In Progress -

For the VERY latest information concerning amazing new discoveries about the Lewis and Clark airgun, please click on: the Lewis Assault Rifle section AND see the latest notes in the What's New section of this website.

Large bore antique airguns have always been a specialty of the Beeman Airgun Collection. In the last three decades, Mrs. Beeman and I have been fortunate to acquire one of the largest collections of Austrian large bore airguns and information about them. This is a preliminary presentation about some specimens from that, starting with the best known of these arms: the famous Girandoni system airguns first developed slightly before the 19th century. The eventual demise of these military airguns by about 1810 had little to do with their effectiveness, but was more involved with the logistics of keeping them charged in combat, the inability of contemporary gunsmiths to maintain the guns, and with the political implications of such weapons which mistakenly were believed to be "silent". That the design was widely copied later in civilian circles indicates that it was well accepted by discriminating civilian gunsmiths and shooters. The system really was more suited to hunters who do not fire so many shots as a soldier, who can have the air reservoirs pumped up at leisure - even by a servant, and whose lives generally do not depend on the gun. Virtually all of the 19th century copies of the Girandoni system airguns proudly bear the name of the maker and the city of his shop. Truly outstanding copies, sometimes richly ornamented with gold and silver coatings and inlays, deeply engraved, and bearing superb, ornate stocks bear the names of such makers as Contriner, Lowentz, Fisher, etc.. Lowentz and Schembor of Vienna and Staudenmayer, Fisher, and Mortimer of London produced a very few high quality Girandoni system repeaters and even single shot air rifles and shotguns with the characteristic Girandoni styling. There are other makers of lesser rank and quality. Copies made after 1900 generally are unsigned and some are crude, even clumsy. The Girandoni system is not easy to reproduce in high quality.

After some detailed coverage of the Girandoni military repeating air rifle, we will consider the Girandoni repeating air pistol, several Girandoni style airguns in the Beeman Airgun Collection and some of the myths about the Girandoni system guns.

They following material is only a preliminary posting of our research. The most intense research is now concentrated on the Girandoni repeating air rifles. The next phase will concentrate on the Girandoni system airguns and Girandoni style air guns. One of our major research objectives is to greatly increase the knowledge, understanding, and appreciation of these special airguns. We constantly are seeking additional specimens, references, and information so that we may present the best single source of information on this group.

What is our background in this area of study? Mrs. Beeman and I have been intensely interested in antique large bore airguns, especially the Girandoni system rifles and pistols, for over three decades. This began long before our interest in collecting and studying airguns of the 20th century. During that time we have studied such airguns with the late Henry Stewart (who started us on the trail to the Lewis airgun) in his astonishing gunroom, and in person in the collections at the Tower of London, Beeman Airgun Collection, Virginia Military Institute, Smithsonian Institute, U.S. National Firearms Museum, U.S. Army War College, Fort Clatsop Museum, German National Museum, Military Museum of Turkey, Kopenhagen Tøjhusmuseum (Royal Danish Arsenal Museum), Milwaukee Public Museum, Zurich Landmuseum, Bern Historical Museum, Solthurn Zueghaus, Deutsch Jagdmuseum - Munich, Jagdmuseum Kranichstein - Darmstadt, Waffensammmlung des Kunsthistorischen Museum and Heeresgeschichtliches Museum – Wien, Staatliches Museum – Schwerin, Victoria and Albert Museum – London, and several other important gun collections throughout the world.. The Jagdmuseum Kranichstein in Darmstadt, Germany and the Heeresgeschichtliches Museum in Vienna, Austria were especially valuable in our quest for information on this design. In most cases, Mrs. Beeman and I were allowed to work in the private research facilities of the museums, in discussion with and active participation of the arms curators, studying, photographing, and even disassembling these incredible arms. In addition, we have studied airguns at innumerable gun and airgun shows in America and overseas and we carry on a long and vigorous exchange of information with other museums and leading collectors all over the world. We are enormously fortunate to have been able to develop the Beeman Airgun Collection. A great deal of study has been done in that collection, which includes several models of the Girandoni design. Antique large bore airguns are the main emphasis of the Collection, apparently the world’s largest such collection.

In addition to developing a reference library on these guns, I have had the wonderful opportunity to study original references in person at many museums and at the U.S. Library of Congress. Only a minor amount of the basic literature about the Girandoni-system airguns is available in English- and some of that is represented by very weak material in secondary sources, such as W.H.B. Smith, Eldon Wolff, and especially such popular general audience works as Nonte and Wesley.I have concentrated mainly on the key works, which are in German. I have also studied some of the less important papers which are in Italian and even French. It is only too clear that many of the so-called references are simply wrong, have incorrect dates, and have repeated popular myths about these guns. (For instance, virtually everyone had been repeating centuries-old misinformation about caliber, magazine capacity, and air bypass mechanisms.) Some of Baer’s writings, though wonderful and often original, continued to repeat incorrect information. (As does some of the material in Joe Mussulman’s truly outstanding Lewis and Clark website – he is committed to correcting those few points soon.). Even some of the great recent work by Geoffrey Baker and Colin Currie needs additional information and fine tuning, due to photographic distortion, lack of access to certain parts of the museum specimens, and mistakes in the literature on which they were depending. More than anyone, these authors are aware of this and are furiously working to make their book highly accurate for the sake of those who would like to recreate one of these guns. We have been supplying very detailed information on the Beeman Girandoni. Colin Currie, working with Geoffery Baker on that detailed structural guide to the Girandoni airgun, flew to the USA in December 2005 to examine museum quality reproductions and castings of this gun and to confer with master gunmaker Ernie Cowan and gun historian Rick Keller about them. Working together, we are correcting and enlarging our own and each other’s work. I sincerely believe that the five of us will soon produce the most through and accurate information pool ever available on this incredible gun design.

Presented here is information which finally develops a fairly clear picture of the features and history of the Girandoni military repeating air rifle. This information has become especially interesting and relevant because so much of it is new. The operation and special features of this gun, even its shortcomings, may be even more important to us than its fabled firepower.

After inventing an ingenious, but unreliable and unsafe, multiple feed system for powder burning firearms in the very late 1700s, Bartholomäus Girandoni (also spelled Girandony, Girardoni, etc.) of Vienna very successfully adapted the system to large bore airguns. Most of the following details are from the wonderful presentation of the design and details of this gun recently published by the British gun researchers Geoffrey Baker and Colin Currie (2002) and the meticulous and precise physical research of Ernie Cowan and Rick Keller, both combined with research and analysis by Robert Beeman.

The Girandoni system was adopted, in great secrecy, as the Austrian military repeating air rifle (Hummelberger and Scharer, 1964/65). It has been recorded that the system was invented in 1780, but deliveries of these guns to the Austrian army did not begin until between 1787 and 1791. Hoff’s (1977) classic reference on antique airguns and Hummelberger and Scharer (1964/65) indicate that about 1500 Girandoni military airguns were produced and that finally they were retired from service to Olmütz in Bohemia in 1815. Specimens, apparently from 1797, and similar to, but more advanced than the military models, are known from Joseph Lowenz and Joseph Contriner in Vienna. Hoff indicates that other Viennese gunmakers started making most of their copies of the Girandoni system well after the Austrian Army had given up all interest in such guns in 1815. Samuel Staudenmayer also began to make modified versions of these guns in his London shop from about 1806 to 1832.

Full length view of the Beeman Girandoni repeating military air rifle, right side. This is the actual specimen which most historians now believe is the very airgun carried and used by Meriwether Lewis in the Lewis and Clark expedition of 1803-06. There is an extensive section of this website devoted to a carefully detailed discussion of these exciting discoveries! This actual specimen was donated by Dr. and Mrs. Robert Beeman to the U.S. Army War College's Heritage and Education Museum in Carlisle, Pennsylvania on September 25, 2006. It is on display at the NRA's National Firearm Museum until May 2007.

Figure 1(above). Girandoni military model repeating air rifle invented by Bartholomäus Girandoni, Vienna, Model of 1780. Breech loading, rapid fire repeater, issued with two extra air reservoirs and four extra 20 shot speed loading tubes. A special long hand pump was provided to every other soldier. The magazine has always been described as holding 20 balls, but the actual total ball capacity of this model is 22 lead balls of .463" (11.75 mm) caliber. . Note that the air reservoir serves as the buttstock. (All photos of Beeman collection by Robert Beeman; reproduction forbidden without written permission of Robert Beeman.) ©2002, Robert David Beeman

Fig.2. Left side, loading block protruding in resting position. Note especially the junction between the iron air reservoir and the brass receiver. Corrupted or non-original copies may display significant differences at this point.©2002, Robert David Beeman

Fig. 2a. Air reservoir cap (left image). This brass piece is screwed into the forward end of the iron air reservoir. The air valve assembly is threaded onto the back side of this brass plate. The cap with attached valve assembly is removed by twisting w/ the cap removal key at the right. Beeman Girandoni original cap and photo. Key made by E. Cowan, 2004.©2005, Robert David Beeman

Figure 3. The combination air intake/exhaust valve and valve housing from the front of a Girandoni air reservoir. The housing is threaded to the rear of the air reservoir cap (above). Such valves, with a single coil spring around a valve spindle with a valve seat at the forward end, were common in butt reservoir guns for at least one hundred years prior to the Girandoni airgun. The actual Girandoni airguns are unusual in having a coil spring made of brass – very advanced for the period and difficult to make, but necessary because moisture from air condensation would rust an iron or steel spring.. The three parts at the left are from the Beeman Girandoni airgun; the three parts on the right were made by Ernie Cowan in 2004 for a museum copy of this gun. Beeman collection and photo.©2005, Robert David Beeman

Fig. 4. The Girandoni system - upper two images show tubular ball magazine on right side of gun, distinctive loading block traversing the receiver. Note that receiver casting is a single top piece. Again notice the smooth transition in lines between the receiver and the air reservoir in this authentic specimen. Lower image shows the sliding loading bar with its ball socket and with the right hand retaining screw removed. These loading bars were tapered so precisely that, before the magazine spring was added during reassembly, the bar would slide into an airtight battery position by its own weight! Caution: due to camera angle and the level of the ruler relative to parts, measurements from such photos may be only approximate. Beeman collection.©2005, Robert David Beeman

Fig.5. Ramrods/Cleaning Rod Tips. Top image - Beeman Girandoni, rod may be an early replacement. Lower - museum copy of correct ebony rod with bone tip cleaning rod for museum copy Girandoni military repeating rifle. Note that in breech-loading airguns, the only function of the rod was for bore cleaning and pushing back stuck balls, not for ramming. Steel rods are NOT original; guns with steel rods should be examined for damage to the delicate, shallow (only 0.005") rifling. Upper rod from Beeman Collection. Lower rod by Ernie Cowan. Photo by R. Beeman.©2005, Robert David Beeman

Figure 6. Inside view of the Beeman Girandoni military air rifle lock with hammer in the resting position. The heavy flat mainspring extends along the forward two thirds of the lock plate. This unusually strong mainspring allowed much greater stored air pressure than a V shaped spring (thus allowing the potentially higher power of the Girandoni design.). The boat shaped air release wedge and striker latch are visible along the bottom rear edge of the lock plate. Note the shaft of a drift punch, restraining the mainspring, just barely visible below the large hole which is bisected by the forward edge of the hammer. The tumbler wedge, sear bridle, and sear lever are evident to the right. Beeman collection. ©2002, Robert David Beeman

Fig. 7 Inside view of the Beeman Girandoni’s lock, without mainspring. Note the tumbler and sear in full-cock position. The bridle at upper right holds these parts in their proper relationship. (Unless otherwise noted, all scales in this report are metric, marked in millimeters.) Beeman collection.©2005, Robert David Beeman

Figure 8. Beeman Girandoni repeating air rifle with lock plate removed. Note that only the upper part of the one piece receiver is solid cast metal. Stock wood and the separate trigger guard form the bottom half of the receiver a potentially weak area of the original Girandoni design. The brass Beeman Museum disc is 7/8" (22 mm) in diameter. Beeman collection.©2002, Robert David Beeman

Figure 9. Original receiver of the Beeman Girandoni military repeating airgun. Only the separate trigger guard parts, and stock wood to be added later, form the bottom half of the receiver. Note the tiny bit of lower lock plate support ledge, at the far left side of the receiver cavity, which allows easy alignment and assembly of the lockplate into the finished gun. This “little notch” is diagnostic of the airguns which followed the original Girandoni design in the decades following its introduction – it appears on several Girandoni style single shot and repeating air rifles and shotguns, even a repeating air pistol, in the Beeman Collection. Beeman collection and photo.©2005, Robert David Beeman

Fig. 11. Reproducing the receiver for a museum copy. First, the actual receiver must have a plastic casting (top two images) made by making a flexible mold around the receiver, removing the receiver and then adding a special fluid to the mold cavity which expands, as it hardens, to the same degree as the later molten brass will shrink as it cools. A rammed sand mold is made around this plastic casting, with a separation line. The plastic casting is removed and the rammed sand mold filled with molten brass. The resulting brass casting (3rd and 4th images) is removed after cooling and then roughly machined to shape (bottom image- note fin for clamping while working the piece. It will be ground off as one of the last steps.). Beeman photos of work by Ernie Cowan.©2005, Robert David Beeman

Fig.12.Rear surface of the receiver of the Beeman Girandoni military air rifle. The bean-shaped black area above the steel striker pin sleeve is the entrance to the air passage which was drilled and filed into the solid metal casting when the gun was made. The valve body of the air reservoir screws onto the threaded shaft presented here. Beeman collection and photo.©2005, Robert David Beeman

Fig. 13.. Rough shaping of the brass casting of the receiver, rear view, showing the start of the air passage and hole for striker pin sleeve. Again, note the temporary clamping lug on top. Beeman photo of work by Ernie Cowan.©2005, Robert David Beeman

Fig. 16. Head of the air pump from authentic museum copy of the Girandoni Military Air Rifle made from the above diagram. Two especially clever design features are shown here. First, note that the plunger, surrounded by several leather seal rings, can come right to the end to the pump, thus eliminating virtually all dead air space - an arrangement necessary to produce very high pressure in the gun's air reservoir. Second, note that the plunger head with its seal rings can be projected out of the pump body (as shown above) so that sealing oil may be applied directly to the leather seals. The seals may then be pulled into the pump body (as shown below) and a wrench applied to the lock nut- to precisely expand the seals to just the right seal and friction. Note that the pump rod is prevented from turning during this adjustment because its square shaft is held from turning by the square hole in the other end of the pump body. Photos by R. Beeman. Museum Copy Pump by Ernie Cowan.©2005, Robert David Beeman

Fig. 16A - Original Girandoni repeating air rifle pouch with all accessories. Courtesy of Museo Nationale Storico d'Artiglieria, Turin, Italy.

The Girandoni military air rifle is a butt reservoir air rifle with a rifled bore. This conical iron air reservoir serves to hold a supply of highly compressed air and to act as the rifle’s buttstock. An external tubular magazine, along the right side of the barrel is described as holding 20 lead balls which are gravity fed to a transverse loading bar at the breech end of the barrel. A flat spring running the length of the outside of the magazine holds the loading bar to the left. When the gun is held muzzle up and the left end of the loading bar is pushed by the shooter, the bar moves to the right, and a cavity within the bar receives a ball by gravity feed from the magazine. The ball is moved into firing position behind the barrel as the magazine spring is allowed to push the loading bar back to the left.

Until very recently we did not have an understanding of the internal operation of a Girandoni air rifle. This lack of solid information led us into considerable confusion and error. Thanks to the recent exhaustive work of Baker, Currie, Cowan, and Keller, and Beeman, we now have a clear picture of the internal operation of this airgun. Presented here, for the first time, are color diagrams, by Geoffrey Baker, of the functioning of the ingenious lock and valve system of the Girandoni repeating air rifle. (Baker and Currie diagram book, 2002.)

Figure 17. Mechanism of Girandoni military repeating air rifle. AT REST. This, and all following drawings, are scale drawings by Geoffrey Baker, based on two British specimens and cooperative information and images of the Beeman Girandoni air rifle from Robert Beeman and Ernie Cowan. Images reproduced courtesy of Geoffrey Baker and Colin Currie.

Figure 18. Hammer pulled back to point where striker latch is about to jump up and engage wedge on tumbler and sound the first click of cocking.

Fig.19. Hammer pulled back to point where sear engages half-cock notch on tumbler. Second click. Hammer may be left in this “safe” position. In this mode the trigger should not be able to cause the hammer to fall and have gun discharge.

Figure 20. Hammer pulled back to engage sear in full cock notch. Third click. Gun is now ready to fire whenever trigger is pulled.

Figure 21. Trigger is pulled, allowing hammer to start forward and have tumbler wedge engage notch of striker latch. Wedge will push the striker assembly against air valve and start to release compressed air from reservoir

Figure 22. Tumbler wedge is beginning to push on the striker assembly which has started to force open the air valve in the reservoir. Air pressure is building to force the ball up the barrel. The wedge will be forced out of the striker latch notch as the tumbler’s wedge rotates further, clockwise, to the rear.

Figure 23. Wedge is now rising out of the latch notch. Air valve is fully open. High pressure air is forcing the ball up the barrel. In the next stage the wedge will move back and slide out of the striker latch notch. The air pressure and the valve spring in the reservoir will then force the air valve shut. The hammer will then move forward and return to the rest position as shown in the first operation figure above.

Fig. 24. Girandoni Military Repeating Air Rifle. Close-up photos of the sear engaging the tumbler's cocking notches in a normally operating specimen in Europe. Upper image: sear engages the "safety" position of the half-cock. The deep lip of this notch prevents the sear from releasing if the trigger is pulled. Lower image: Sear engaging the full-cock position. Note that the tooth of the sear can easily be rotated out of the full-cock notch, thus discharging the gun, simply by pulling the trigger. (Again, note the much deeper, ledged half-cock notch at the left.) Photos of a British specimen, courtesy of Geoffery Baker.

Fig. 25. Detail of first click when cocking. As the hammer turns the tumbler counter-clockwise during cocking, the striker latch (orange) is snapped up as the rear lip of the tumbler wedge passes the point at the tip of the lower arrow. Firearms lack a striker latch, therefore firearms do not produce a click at this point during cocking. (This, and all following diagrams, by Geoffery Baker.)

Fig. 26. Detail of second click when cocking. As the tumbler turns counter-clockwise, the sear (yellow) snaps into the normally deep half-cock notch at the tip of the lower arrow. The depth of this notch normally prevents the sear from coming out of the notch. This prevents the gun from discharging and serves as a “safe” position. (Early production of the Girandoni air rifles did not have a half-cock position.)

Fig. 27. Detail of third click. As the tumbler rotates counter-clockwise, the sear tip snaps into the full-cock notch at the point of the arrow. The gun will now discharge when pulling the trigger causes the sear to slip out of this shallow notch.

Figure 28. Exposed detail of hammer at forward rest position. Tumbler rebound stop is resting flat on the mainspring. Note the roller bearing on the back of the tumbler; a very advanced feature for the period. Several parts removed from drawing, and lower part of hammer made transparent, to aid clarity.

Figure 29. Exposed view of cocked hammer and mainspring. Tumbler is pushing down mainspring into its cocked, tensed position. Pulling the trigger allows the sear (yellow) to move out of the full cock notch and release the potential force of the mainspring to push against the rear section of tumbler and cause it to rotate around the tumbler pivot pin.

Figure 30. Detail of the striker assembly. (Upper diagram is a side view. Middle diagram is a top view.) When the air valve closes, propelled by high pressure air in the reservoir, it gives a sudden acceleration to the striker assembly. The striker latch guide screw limits the forward movement of the striker latch towards the barrel. The first operational figure above shows that this screw is supported at both ends to resist the beatings of the striker latch being driven forward. Its outer head is rounded for appearance and protection to the shooter’s finger. The striker latch guide screw does not have any adjustment role[4] Note that the striker latch is not symmetrical. Lower image shows actual parts from the Beeman Girandoni. ©2005, Robert David Beeman

After moving a ball into firing position, the gun is cocked by pulling back on a hammer-like cocking lever. Moving the cocking lever back causes an internal tumbler on the inner end of the cocking lever (hammer) to force the mainspring down into a compressed position. The cocking lever is held to the rear, against the pressure of the mainspring, by the half cock or full cock sear notches. When the trigger is pulled and the tumbler is in the full cock position, the rearmost section of the trigger forces the sear out of the full cock notch. The released force of the mainspring forces the tumbler to rotate, bringing the tip of a wedge shaped part on the tumbler into the notch of the striker latch. The force of the mainspring is converted into a straight line motion as the wedge pushes the striker latch and thus the attached striker pin against the forward end of the air reservoir’s valve. The tip of the striker pin forces open the valve and releases a short blast of compressed air to force the ball up and out of the barrel. The wedge then slips past the striker latch and the air valve spring, aided by air pressure in the reservoir, forces the air valve shut and returns the striker assembly back into its resting position. Movement of the wedge is reversed during re-cocking, depressing the striker latch and allowing the wedge to pass without disturbing the striker assembly and air valve. This all can be repeated so rapidly that all 22 balls could be fired in less than a minute.

Fig. 31. Lead balls for the museum copy. Right: unfired ball. Left: Ball fired by the author into soft material from a museum copy of the Beeman Girandoni, 750 psi air pressure. This may be one of the first balls fired from a military Girandoni for the last century or two! Discharge sound was lower than a firearm of equal power, but quite loud. Beeman collection and photo.©2005, Robert David Beeman

The Girandoni lock system is a quite sophisticated, well-designed timed release design and the repeating mechanism reveals its genius by its efficiency and simplicity. Baker and Currie (2002) make the very interesting observation that there wasn’t another conventional military shoulder arm comparable to the firepower of the Girandoni repeating air rifle until the 1860 Spencer repeating firearm rifle of the American Civil War. However, the Spencer had only a seven shot magazine and had to be reloaded frequently by the rather clumsy Blakeslee loader. The Girandoni military air rifle had a gravity feed ball magazine listed at 20 rounds. Each Girandoni-bearing military shooter was issued two extra air cylinders and four very efficient speedloader tubes, each containing twenty additional balls. A fully loaded Girandoni kit had eighty of those large caliber balls ready for rapid action! In typical use, discharged, or partially discharged, air cylinders would be exchanged for fresh full ones by runners going back and forth to stationary wheel pumps or special two axle wagons designed to carry up to 1000 pre-charged air cylinders, both positioned behind the combat lines. Certainly the soldiers were not going to fully pump up their three cylinders in regular use as this would require about 4500 strokes with the hand pump! Even a single cylinder could have taken over an hour and one-half of hard pumping action! But the long slim pump, designed almost without dead space, while inefficient in the filling of cylinders, would be useful in “topping off” high pressure in partially expended cylinders.

The outstanding study of the history of the Girandoni Military Repeater Air Rifle by Walter Hummelberger and Leo Scharer (1964) reveals that the success of the Girandoni air rifle in warfare has been a mixed matter. About 1780, the Austrian military authorities, driven by Emperor Joseph’s personal involvement and great enthusiasm for the Girandoni airguns, had secretly begun the development of the so-called Austrian Military Model 1780 Repeating Air Rifle. By August 24, 1787, when Istanbul declared war against Russia, some air rifles and pumps were the only things that were ready for war. It was realized from the beginning that it might not be practical to provide all the compressed air for these guns from little individual hand pumps. So Girandoni developed a wheeled pump to fill the removable air bottles of the guns. Originally, it was planned to have one such wheeled air machine for each five air rifles, plus the long hand pumps, but only two of the wheeled pumps actually were produced[5]. Later, it was decided to issue a hand pump to only every other soldier, underlining that the soldiers mainly were expected to depend on pre-charged air bottles brought to them by runners. Girandoni developed a two axle wheeled wagon, or transporter, to safely carry up to 1000 of the pre-charged air bottles.

The conical butt reservoir may seem primitive, but actually this shape is extremely functional. One of the most annoying features of many airguns with buttstock shaped air reservoirs in the Beeman collection is the difficulty of getting the vertical axis of the buttstock to line up with the vertical axis of the receiver. A conical butt reservoir is round in cross section and thus there is no alignment problem; one only need screw it onto the receiver until it is snug. Thus the flat ring gasket between the receiver and reservoir, made of cow horn, can be of any reasonable thickness, regardless of tolerances, wear, oil swelling, or humidity. The reservoir shape has little ergonomic disadvantage as recoil is negligible.

The steps in making a conical butt reservoir are shown in the illustrations. Riveting the edges of the rolled edges is a somewhat difficult operation, even today. However, the real trick is brazing the rolled edges and the base cup. At first, standard brazing technique was used, but this just would not result in a leak proof reservoir. Finally, the answer was found in information about 19th century steam tank fabrication. The old, but very effective, technique was to heat the riveted reservoir red hot and submerge it in molten brazing metal! Learning this also answered something that had puzzled us: why were the Girandoni reservoirs coated, inside and out, with copper like metal? This inner coating also provided a rust proofing against moisture resulting from the expansion of compressed air. Making the reservoirs, in an authentic manner, will be one of the major challenges to those who would attempt to replicate these guns today.

Emperor Joseph personally was involved in the most detailed matters of the Austrian military airgun project and their use in combat. He realized early that the air guns must be “deployed correctly and maintained at the best standard. It is necessary that the simple soldier, whose intelligence is generally quite limited, is given this training immediately upon receiving the gun – and that the training is delivered in individual parts and not too much at once.” It was determined that two corporals would have to be especially trained to train and supervise the rank soldiers in the use of the Girandoni airguns. Thus every 20 air-riflemen would be supported by these two special corporals plus a specially trained officer. In addition, there would be a specially trained journeyman gunsmith for each 100 airguns and a supply of replacement seals, air reservoirs, mainsprings, etc.. . Even with this intense support, there was considerable malfunctioning and poor maintenance of the airguns. Emperor Joseph was soon complaining that “we appear to have a miserable bunch of riflemen, none of who is suitable for service with the air rifles.” By end of November 1788 the Emperor seems to have ordered that the air rifles be taken away from the troops. The General Artillery Director, the Duke of Colloredo himself, reported on July 21, 1789: “Due to their construction, these guns were much more difficult to use effectively than normal, as one had to handle them much more cautiously and carefully. In addition, the soldiers using them had to be supervised extremely carefully, as they were unsure about the operation. The guns become inoperable after a very short time – so much so that after awhile no more than one third of them were still is in a usable state. We needed the whole winter to repair and replace them.” After this it was deemed wise to take back the airguns and issue them only to select, specially trained Tyrolean sharpshooter units. The last order given by the Emperor prior to his death was “to select the most promising and skilful soldiers to use these guns.” Because of extensive service work, and most importantly, the lack of Emperor Joseph’s interest and involvement, the airguns still had not been issued on December 16, 1792. However, the Tyrol Sharp Shooter Corps indicated “that these weapons were really accurate and effective” in the Turkish War and in 1790 against Prussia. (Contrary to many accounts, they never saw service against any of Napoleon's troops.) The air rifles were later supplied only with the wheeled and short hand pumps behind the lines – the idea being that captured airguns would not be very useful without the pumps!

Thus, the Girandoni air rifle in combat required persons highly trained in its use and supported by wheeled air pumps and wagons of pre-charged air bottles. These air guns easily were put of service and needed constant and expert tending. A Girandoni air rifle was predestined to give inexperienced users trouble and charging with individual hand pumps was punishing to the user. The dependability of the gun for lethal combat, under field conditions, especially without the backup of dozens of other airguns, was not high.

Because of the sophisticated nature of the flat mainspring and the timed release mechanism, Baker and Currie (2002) suggest that the Girandoni system is capable of much greater power than air rifles of less advanced design. As of May 2003 they were only willing to indicate that this system could project a lead ball, of about one-half inch diameter, of about 210 grains to a muzzle velocity of at least 500 fps for about 117 ft. lbs. of muzzle energy. Colin Currie reported (personal communication May 18, 2003) that the Royal Armories of Leeds, England recently charged the Heiberger .433 caliber air rifle, a formerly single shot air rifle made about 1750 but converted to a 23 shot Girandoni-style repeating system[6], apparently in the early to mid-1800s, to about 800 lbs/sq. inch and achieved a muzzle velocity of over 900 fps with balls of 120.4 grains for a muzzle energy of 217 ft. lbs. He reported that 1500 strokes were needed to pump up the Heiberger‘s buttstock reservoir to operating pressure after 20 shots had been fired from one charging/loading.

Larry Hannusch (personal communication, Nov. 27, 2002) reported that he has fired his own large bore Girandoni-system rifle (by Lowentz) producing 200 ft lbs. muzzle energy at 750 psi pressure, but that a muzzle energy of up to 150 ft. lbs. would be more typical at conservative pressures. Many references to the Girandoni air rifles mention lethal combat ranges of 125 to 150 yards and some extend that range considerably. Currie and Baker also suggest that the Girandoni system could operate well at pressures well above 1000 psi, perhaps to double of that, and that they feel that the working pressure as supplied by special pumps, and thus the potential power, of the original guns was far higher than the figures normally quoted. Keller and Cowan (personal communications 9 November 2004 and 14 February 2005) think that the original air reservoir pressures topped at about 800 psi. The potential muzzle energy will be more accurately determined from tests now underway with exact museum copies of these guns. The power could be in the .38 Special area of modern firearms, or even, as probably overstated by Fred Baer (1973) into the range of the .45 ACP cartridge, famous in pistols and submachine guns favored by police, gangsters, and the military for several wars of the 20th century. In any case, that heavy lead ball, fired from a Girandoni-system airgun, could be a very lethal object! High air reservoir pressures, translating into high power, could be an advantage in battle where charged cylinders were being shunted to and from the shooters. However, such pressures and volumes of air per shot for such large bore airguns present such a fearful appetite for compressed air that modern shooters of pre-charged pneumatic rifles resort to SCUBA tanks and motorized pumps for charging.

The power levels discussed above were very potent for the period. However, foot pounds of energy do not tell the whole story. Few hunters today would venture after big game with the energy levels of the old big bore airguns or flintlocks, but those big lead balls, about a half-inch in diameter, have a special effect – as does a deadly arrow with “only” fifty foot pounds of striking energy. One has to respect a gun capable of shattering a huge lead ball against a distant steel plate, especially when a typical Girandoni system gun could deliver about 20 of those heavy missiles within the minute and another 80 rather suddenly! The simple great inertia and the large wound channel of those big lead balls also makes them far more dangerous than paper figures would suggest.

Side Note on the Beeman Girandoni military air rifle: We purchased the illustrated specimen from the private collection of an American antique gun dealer about 1975 without any provenance. The master gun reproduction maker/historians, Ernie Cowan and Richard Keller, have made just four ultra precise museum copies of this specimen. They are extremely impressed with the excellent craftsmanship and engineering - all parts are arsenal marked as matching and very well fitted. The air reservoir bears a brazing metal coating - a feature of the Girandoni produced airguns. Cowan and Keller, directly studying the actual gun, indicates that not only are they convinced that this was one of the military models of the Girandoni military air rifles, made somewhere in the middle of the actual Girandoni production (construction details, such as the presence of a half cock, would place it about 1798), but that it probably was an actual combat gun which was illegally possessed outside of the military circle. This is evidenced by the apparent removal of the serial number on what clearly is an authentic Girandoni military model. The receiver profile seems to be somewhat lower and thinner in the locations where the serial number would be expected and the front of the air reservoir end cap, where another serial number would be expected, appears to have been filed shorter. (Close examination shows that the front of this tapered brass piece falls a little short of the diameter of the adjoining receiver.) The true military status of this wonderful specimen, as revealed by factory markings and exact measurements, was confirmed by the British airgun historians, Currie and Baker. They have been producing a series of books detailing the construction of famous historical types of airguns. Their feeling is that this airgun is an authentic military production specimen diverted to the civilian market. Baer (1973) indicates that Girandoni was accused of diverting some specimens to the more profitable civilian market. Some specifications: Unloaded weight = 9.2 lbs., loaded w/ 20 lead balls = 9.6 lbs. Weight of empty air reservoir assembly = 3.0 lbs. The barrel is wrought iron. Rifling is excellent, and relatively shallow (about 5 thousands of an inch), commensurate with high efficiency in an airgun.). The air valve consists of three stacked pieces of hard leather, cut to a 60 degree slope to match the slope of the brass valve seat. The front sight is brass or bronze. Finish of protected iron surfaces is a dull dark, hot bluing.

There are several oft-repeated tales about Girandoni system airguns which we now know to be fanciful. Some historical accounts simply are not true or they may contain comments that are not true.

First, One of the most common myths is that Napoleon ordered the hanging of anyone in possession of an airgun. The late Arne Hoff, famed arms historian and curator of the Royal Danish Arsenal, and others, have commented that this story, told as the “eye witness” war experience of French General Mortier, has now been quite thoroughly refuted (Baer, 1973). This story may have grown from the fact that many towns, fearing these unfamiliar, terrifying guns - even without any negative incidents, banned airguns. A death penalty was common for many offenses, so it is possible that some airgunners were put to death. One story relates that the city fathers had a gunsmith, who knew how to make airguns, blinded!

Second, apparently there never was any incident of the air rifles being used against Napoleon’s troops.

Third, it is often related that these guns were silent. A number of city, and other governmental decrees of the 1800s, made the guns illegal, often largely on this basis. I can state from personal firing of a fully-charged museum copy of the Girandoni military air rifle that the discharge sound is quite audible, though by no means as loud as a similar large bore flintlock firearm. However, the fact the guns discharge without smoke or muzzle/pan flash does make locating the position of someone firing such a gun much more difficult. (Modern note: Powerful, modern, silenced, 9mm PCP airguns are being used by U.S. Seals in Iraq to snipe at insurgents. Firing an M-16 at dawn or dusk could attract a lot of return fire to the flash point.)

This combination of a Girandoni system and an older Heiberger single shot air rifle is especially interesting.

Upper images -RHS and top views of the Heiberger/Girandoni Combination. Middle image: Barrel and repeater assembly removed from Heiberger converted airgun, rear view. Note that the decorative lines of the second rear sight, loading block retainer bolt heads (grooved rectangular units on top of each end of the loading block), plain finish, magazine spring, magazine length, and magazine hatch handle are exact Girandoni styling. Also note the brass bore liner which reduces the volume of the transfer chamber (the round profile rear extension) between the reservoir valve and the lead ball in firing position. This bore liner would also jet the air towards the ball and serve to reduce rust due to adiabatic condensation. The round profile extension (steel?) behind the wrought iron barrel/loading bar assembly surely is an addition specifically made to fit it to the Heiberger action - no such extensions are known in other Girandoni-system airguns and the profile, length, and threads exactly fit the Heiberger action. (This extension has rifling continuous with the rifling in front of the loading block - this would be the result of relining and rerifling the entire barrel or of "freshening" the original rifling.) (BTW: Owner David Swan, in England, assures me that the Girandoni-system addition is NOT marked as to maker - the report in Airgun Hobby magazine that it was marked with the Contriner name was an editing error.) David uses 11mm (.433") lead balls, which may be a loose fit in the bore.. The barrel is rifled with 12 grooves with a right hand twist, with 1 turn in 25.5 inches, a much faster turn than found in flintlock firearms of the period. The rifling twist of this arm is a little faster than the 26.25 inch twist of the original Girandoni military air rifle barrels, evidently an adaptation to the higher velocity of the slightly smaller projectile of this gun. The ID of the magazine tube is 11.9mm (0.470") and the loading block ball recess is 12.1 mm (0.476") in diameter; measurements consistent with these parts having been acquired from a standard 11.75 mm Girandoni military air rifle..

Lower picture: Lead balls, .11 mm (433") caliber, before and after being fired at a steel plate from the converted Heiberger repeating air rifle in 2002. Note lack of any rifling marks.

Fig. 32. Single Shot Air Rifle by C. Heiberger of Vienna, made ca. 1750-1760, converted to Girandoni system repeater action, apparently using the barrel, magazine, and action from a Girandoni-system air rifle. Conversion ca. 1815-40. This conversion could have been rather easily accomplished by simply adding a short barrel extension to a barrel assembly, with attached loading block, magazine tube, and even sights, from a disabled Girandoni-system airgun into the Heiberger receiver. Note that the Heiberger conversion has two rear sights: an original one on the receiver and a Girandoni style one which came with the added barrel/repeater assembly (that forward Girandoni sight is too low to be seen by the shooter over the original rear sight!). This 23 shot repeater has a standard V-shaped internal mainspring. The nature and size of the external cocking lever ("hammer") indicates that the mainspring was very powerful. The round section buttstock air reservoir may also be a later Girandoni-system item. Fires very loudly and flattens its discharged balls very impressively against a distant steel plate. The high sound may be a side effect of loose ball fit.

Probably a "one-off" item, of considerable power and great firepower, without decoration but in excellent condition. While understandably lacking many design features of the Girandoni military repeater, it functions well and would have been a fearsome weapon. The Heiberger does have at least a couple of superior features not found in the later regular Girandoni air rifle design: an air bypass lever (on the left lock plate) and a far stronger fused two-part receiver body of heavy cast bronze both top and bottom. This particular gun may be the only such conversion ever made; no other such specimens are known. No case or pump are known for this gun. Of course, because it was built as a hunting arm, rather than as a military arm, no speed loaders ("spare magazines") are known. The workmanship of the conversion is of a considerably lower quality than the original Heiberger gun. It does not appear to have been done by a highly skilled gunsmith. This Heiberger/Girandoni-system conversion gun had been stored as No. 425 in the Salm-Reifferscheid Armory, Schloss Dyck (Dyck Castle, near Düsseldorf, Germany) until 1992 and apparently has never left Europe. Courtesy David Swan collection, photos by David Swan.

Figure 33. Girandoni Repeating Air Pistol - About 1800. Approx. 9 mm. This superbly-made, gold-plated, silver inlaid, deeply engraved pistol on the exact Girandoni system clearly was made for an important, perhaps royal, user. Note that the barrel is signed "Girandony" - a spelling that was used by Girandoni. It has been suggested that this pistol was made by the master airgunsmith Joseph Contriner for Girandoni, but he signed his work "JC" - the lock on this gun clearly shows a "JG". Bartholomäus Girandoni did have sons named Bartholomäus and Johann Girandoni. This suggests, as was previously not known, that Johann, described as especially talented and trained by his father in technical skills, may have been involved in the production of the Girandoni repeating airguns - perhaps in the Contriner shop in Vienna, after his father's death in 1799. This very specimen is shown on pg. 93 of Wolff (1958)Courtesy of Beeman collection.©2005, Robert David Beeman

Notice, even on the single shot guns, the flask shaped air reservoirs and the diagnostic "little notch" which aligns the lock plate in the receiver body. Research is only beginning on these specimens. Additional information, input, and specimens are all much needed and solicited for this research. This photo series is only intended to give a general impression of some of the variety of these guns.

Fig. 35. Girandoni-system repeating air rifle by Joseph Lowentz (Lowenz) in Vienna, ca. 1810. This airgun has a bore size about 0.465" and a 17 shot gravity fed magazine with an inside diameter about 0.470". Note the auction tag giving the professional antique gun appraiser's combined value of 1000 to 1200 British Pounds for the combined lot number 164 ot the three airguns shown in the fourth image above. (Dec. 2004: 1 BP= US$1.90). Courtesy of Beeman collection.©2005, Robert David Beeman

Fig.36. Girandoni style single shot airgun, for ball or shot, signed by Lowentz. Almost exact same styling as the Lowentz repeating air rifle above. This specimen shown on pg. 94 of Wolff (1958). Courtesy of Beeman Collection.©2005, Robert David Beeman

Fig. 37. Girandoni-system repeating air rifle by Joseph Contriner in Vienna, ca. 1810. Terrible image of the one of the finest Girandoni-system air guns known. Photo is copied from image of this specimen on pg. 93 of Wolff (1958) because gun is being professionally restored by Ernest Cowan and not available for photos. Gold plated, silver inlaid, deeply engraved- perhaps even more elegant than the Girandoni air pistol shown above. Magazine capacity of about 16 (est.). Courtesy of Beeman Collection.

Fig. 39. Girandoni-style single shot air rifle or air shotgun signed by Stirtia of Vienna, ca. 1820. Unusually long .42 caliber smoothbore iron barrel tightly wrapped with attractive fiber braiding. Courtesy of Beeman Collection.©2005, Robert David Beeman

Made in the 1940s during WW2, this gun doesn't look like a Girandoni, but examination shows that it clearly was built by someone familiar with the Girandoni repeating airgun system. The story is that this gun was built in Austria by a partisan bicycle maker during the Nazi occupation in WW2 . The repeating magazine is spring fed and on the left side of the barrel, for the convenient use of a right handed shooter. The gun was charged with the accompanying bicycle type pump. Smoothbore, as would be expected, but firing a 11 3/4 mm lead ball (.463" caliber) (the very same caliber as the original Girandoni Austrian military repeating air rifles!), this would have been a fearsome weapon against sentries, drivers, military leaders, etc. at ranges up to perhaps 100 yards. To a freedom fighter, the lower discharge sound and the lack of flash or smoke would have been huge values. And it did not need powder, primers, or bullets - only easily cast lead or soft-metal balls! The builder surely drew his inspiration from an Austrian museum which displayed a Girandoni system airgun. The excellent quality reflects the experience of a perfectionist bicycle maker with considerable time on his hands - consistent with such a craftsman in an occupied area.

Note that this gun has a spring fed magazine, rather than the gravity fed magazine of the original Girandoni military air rifle. While a gravity feed mechanism might be simpler, and even more dependable, the spring fed magazine has great advantages for the purposes of this gun. It is more suited for operation from a vehicle or firing slot where it would be impractical to tip up the rifle for loading and it allows firing with minimal motion at the firing point - very important to a sniper.

Basic specs: A husky 12.2 lbs., 45" overall, glare-free, w/ almost camo anodized type finish.

Fig. 42. Austrian air rifle built for an emperor? A truly elegant double barreled rifle - left barrel is a percussion, muzzle-loading firearm. The right barrel is a breech loading, butt-reservoir air rifle - about .40 caliber - Pushing forward on a lever in the trigger guard causes an invisible breech block to rise up out of the top of the receiver for easy, fast loading. Deeply inlaid gold letters include numerals on the left side let you set a four step power selection lever for bunnies to bear! Extremely deep engraving, gold inlays, elegant calf-skin covered butt reservoir- ca. 1850-60? Photo by R. Valentine Atkinson. Courtesy of Beeman Collection.

What may be the pinnacle of evolutionary development of the Austrian Girandoni system is shown in the accompanying picture of a 19th century Austrian side-by-side double-barrel air/percussion combination. The key feature of the genius of the Girandoni system, a sliding breech block with a ball socket, has here evolved into a concealed, vertically moving breech block with a similar ball socket. The firepower of the long magazine has been replaced with the combination of firepower and dependability of a double-barrel gun with two completely different power sources. The round-bottom, conical flask air reservoir has evolved into a leather covered air container shaped like a modern long arm buttstock.

I have commented in the Lukens airgun paper on this website, that, as previously discussed between myself and the late Henry Stewart, that the “shape and style” of the Lukens airgun receivers seemed to be similar to the receivers on Girandoni-style Austrian butt reservoir air rifles in the Beeman collection. Thus, I was obliged to again compare the receivers of Girandoni style repeating airguns with those of Lukens single shot air rifles. Although there is superficial external similarity due to being rounded, as is common, and having the air reservoir connection, barrel base, and lock in similar locations, as would be dictated by function, the receivers, and also the air reservoirs, of the two lines of airguns are very different. Internally, and in all the lock areas, the Girandoni airguns and the Lukens airguns are completely different. The Lukens and Girandoni receivers are vastly different. The Girandoni receiver basically is just a single brass top piece, cast from side to side, with the lower area of the receiver being just the trigger guard and an extension of the wooden stock. A simple notch along the lower, right edge of the brass casting holds the rear tip of the lock plate, simplifying assembly. The Lukens/Kunz air rifles have a two receiver piece brass receiver, cast from side to side and brazed along the center line - the solid metal receiver completely enclosing the central area of the gun, top and bottom. In the Lukens the air transfer tube is brazed into place when the two side shells are joined. In the Girandoni the air transfer channel is a tunnel drilled and filed or cast in place. This is detailed in the paper on the Lukens gun itself.

When Stewart, and later I, made the remark about similarity of Girandoni and Lukens styling we were not aware of the complete contrast of the mechanisms and structure. We were only referring to superficial cosmetic appearance and the presence of a butt reservoir. Similar cosmetic styling, but certainly not structure, of the receiver was found at least as far back as a single shot air rifle by C. Heiberger, a Luftbüchsenmacher (airgun maker) of Vienna, about 1750. And while the Lukens butt reservoir is not very much like the Girandoni reservoir, it is similar to butt reservoirs found on external lock air rifles that go back two centuries.

Conclusion: There appears to be not the slightest indication that the style or design of either gun was influenced by the style or design of the other. The styling of each can be traced as separate back to at least the mid-1700s.

Baer, Fred. 1973. Napoleon Was Not Afraid of It. Pp. 250-257 In: Arms and Armor Annual, Ed. By Robert Held, Digest Books, Northfield, Illinois.

Baker, Geoffrey and Colin Currie, 2002. The Construction and Operation of the Air Gun. Vol. 1. The Austrian Army Repeating Air Rifle. 64 pp. www.gunbooks.co.uk. (Very important: based on new work by Baker, Currie, Cowan, Keller, and Beeman, this book, primarily detailed drawings of the gun and its parts, is being corrected and revised for republication in 2005. This book is absolutely essential to anyone interested in the Girandoni airguns. A similar book detailing the construction of aircanes has also been produced by this industrious and exacting pair.)

Beeman, Robert. 2006. Meriwether Lewis's Wonder Gun. We Proceeded On, official journal of the Lewis and Clark Heritage Trail Association. May 2006.

Blackmore, Howard 1965. Guns and Rifles of the World. Viking Press, New York. Redwood Press Limited, Trowbridge & London.134 pp.

Brown, Shaun 2002. Samuel Staudenmayer, Gunsmith, Cockspur Street, London. Arms Collecting 40(3);90-93.

Demmin, Auguste 1893. Die Kriegswaffen in ihren geschichtlichen Entwicklungen , p. 976, Leipzig.

Eichstädt, Ulrich. 2005. Wer Wind sät... VISIER, Dec. 2005, pp.114-120.

Hoff, Arne, 1977. Windbüchsen und andere Druckluftwaffen. 105 pp.. Parey, Berlin.

Hummelberger, Walter and Leo Scharer. 1963. Eine Repetier-Windpistole. Wiener Geschichtsblätter, 204 sqq..

Hummelberger, Walter and Leo Scharer. 1964. Die österreichishce Militär-Repetierwindbüchse und ihr Erfinder Bartholomäus Girandoni. Part 1: Pp. 81-95.1965: Part 2:24-53. Zeitschrift fur Historische Waffenkunde. Deutscher Kunstverlag, München, Berlin.

Konwiarz, Christian 1983. Test Firing a 150 Year Old Air Rifle. The Gun Report, August 1983:14-20.

Munson, H. Lee. 1992. The Mortimer Gunmakers- 1753-1923.Andrew Mowbray Inc, Lincoln, Rhode Island.. 320 pp.

Rothenbücher, C. 1816. Über den Brand der Gewehre. Zeitschrift für das Forst und Jagdwessen im Königreich Bayern 4: 40-42.

Saunders, Tim. 2003. Sniper's Delight. Airgun World pp.72-3. (Heiberger-Girandoni conversion)

Schäfer, Otto, 1961. Die Windbüchsen im Museum Kranichstein. Deutsche Jäger Zeitung.. January 1961:436. Melsungen, Germany.

Stumpf, Manfred 1960 Waffen Almanach. Fachverlag Dr. N. Stoytscheff, Darmstadt, Germany. 256 pp. (See esp. the 1766 Windbüchsen warning on p. 208.)

von Train, J.K. 1844. Die Niederjagd in allen ihren Verzweigungen vol. 1:28-32. Ulm, Germany.

Støckel, Johan F., 1978-82. Revision edited by Eugene Heer: Heer der Neue Støckel. Internationales Lexikon der Büchsenmacher, Feurwaffenfabrikanten und Armbrustmacher von 1400-1900. 2287 pp. Journal-Verlang, Schwend GmbH, Schwäbish Hall, Germany.

Wolff, Eldon 1958, Air Guns. 198 pp. Milwaukee Public Museum Publications in History 1. Milwaukee Public Museum, Milwaukee, Wisconsin.

Wolff, Eldon 1963, Air Gun Batteries. 28 pp. Milwaukee Public Museum Publications in History 5. Milwaukee Public Museum, Milwaukee, Wisconsin.

[1] “Rapping” is the quick snapping of the cylinder down against the pump to top off the air that can be entered by regular pumping. Rapping in air vs. pushing it in can be compared to hammering in a nail vs. pushing it in with a hammer. For many years I have been "rapping" higher pressures into Yewha and other pneumatic guns than could have been predicted on the basis of my tenth-of-a-ton weight. (Both Barnes and Gaylord, have since reported -via personal communication of October 20, 1999 - that such "rapping" can indeed produce air storage pressures in some airguns greater than would be predicted from the body weight of the shooter. The weight of the shooter may be almost irrelevant in determining the air pressure that he can produce.). Recent tests by Beeman, Cowan, and Currie indicate that such "rapping" is not possible with the Girandoni airguns.

[2] An intriguing feature of these pumps is their ingenious design: the upper end of the pump shaft is square in cross section. After pushing the pump head out for cleaning and oiling the seals would be pulled just into the pump’s bore. Then the square shaft passing through a square guide cap would hold the shaft still as the threaded pump seal nut was turned to expand the seals, thus providing perfect fit and tightness.

[3] Geoffrey Baker (personal communication, 10 November 2004) commented: The shorter larger diameter pump would not reach as high a pressure as the longer thinner one. The air vent has lost volume which is not much of a problem at lower pressures .For high pressure it is essential to have as little lost or “dead” volume as possible. Girandoni was a genius. He very cleverly got around this problem by continuing the pump tube right up to the end. Air cane pumps are similar to the shorter one and the air vent is relatively large. Modern pumps like the Slim Jim variety used by the now defunct Brocock Company had a tiny air vent but they are designed to pump to much higher pressures than the aircane ones. (The short. thick pump is the type known from most specimens of antique airguns.)

[4]. The impact of firing seems to loosen this screw.

[5] Girandoni reported that the wheeled pumps actually were a bit slower than the long hand pumps, but even though the filling of an air bottle would require the same amount of energy input from a wheeled pump as from a hand pump, the wheeled pump must have been enormously easier to use. It is staggering to think of the amount of manpower that would have necessary to keep those transporter wagons full of hundreds of fully charged air bottles, plus shunting them to the shooters. This alone could have been a key reason for the decline of the airgun as a regular military weapon.

[6] Almost surely, only one such conversion has ever been made. The Heiberger/Girandoni conversion gun had been stored in Schloss Dyck (Dyck Castle, near Düsseldorf, Germany) until 1992 and apparently has never left Europe. There is no indication that a Heiberger airgun, listed by Wolff (1958) as being in the Mack collection in America in 1958, ever was anything but an original single shot airgun. It is the only Heiberger known by the author to have been in the Americas.

[1] Dr. Robert Beeman is a Lewis and Clark Trail Heritage Foundation member, Professor Emeritus at San Francisco State University, founder of Beeman Precision Airguns, publisher of Airgun Journal and Airgun News, author of many airgun publications and bulletins, airgun designer, airgunsmith, senior author of the Blue Book of Airguns series, airgun expert witness, airgun consultant, and airgun collector and historian.