http://www.arbaletepneumatico.com/
Here is something very different, a pneumatic speargun that looks like a timber stock arbalete. The rectangular shape (or at least the housing for it) pressurized air tank is situated under the pistol handgrip and a tube must run up inside the handle to connect to the rear of the inner barrel tube, however in this case the actual “inner barrel” is encased in a long timber stock. So in a sense it is a rearrangement of a rear tank pneumatic gun, but with a few directional changes as the air flow moves from tank to barrel during the shot as the layout is non-linear. Start pressure is 20 Bar and you can see what looks like a hand pump connection sticking out on one side of the rectangular tank block at its rear. I don't know how the trigger mechanism works, or how that mechanism traverses the pressure boundary, but if it uses a mechanical sear catch then there must be an intermediate pressure housing or block with a sear lever activating transmission pin crossing a pressure boundary wall. Wherever you have angled joints there are possibilities for air leaks if the pressurized components ever move with respect to each other, such as if the entire assembly is exposed to unexpected impacts or stresses. The rear handle pneumatic guns we are familiar with have all the components buried inside the air tank, whereas the classic layout mid-handle pneumatic guns relied on the mid-handle body section as a connector, but with the inner barrel tube running the full length of the gun the inner barrel was still the structural member holding those guns together against the air pressure trying to blow them apart. Only the early mid-handle versions had the barrel projecting forwards from the mid-handle body with the rear tank containing nothing but an air tank. Thus this “Arbalete Pneumatico Santino” is somewhat the same, however it would be interesting to learn more about the internal mechanical layout.
Here is something very different, a pneumatic speargun that looks like a timber stock arbalete. The rectangular shape (or at least the housing for it) pressurized air tank is situated under the pistol handgrip and a tube must run up inside the handle to connect to the rear of the inner barrel tube, however in this case the actual “inner barrel” is encased in a long timber stock. So in a sense it is a rearrangement of a rear tank pneumatic gun, but with a few directional changes as the air flow moves from tank to barrel during the shot as the layout is non-linear. Start pressure is 20 Bar and you can see what looks like a hand pump connection sticking out on one side of the rectangular tank block at its rear. I don't know how the trigger mechanism works, or how that mechanism traverses the pressure boundary, but if it uses a mechanical sear catch then there must be an intermediate pressure housing or block with a sear lever activating transmission pin crossing a pressure boundary wall. Wherever you have angled joints there are possibilities for air leaks if the pressurized components ever move with respect to each other, such as if the entire assembly is exposed to unexpected impacts or stresses. The rear handle pneumatic guns we are familiar with have all the components buried inside the air tank, whereas the classic layout mid-handle pneumatic guns relied on the mid-handle body section as a connector, but with the inner barrel tube running the full length of the gun the inner barrel was still the structural member holding those guns together against the air pressure trying to blow them apart. Only the early mid-handle versions had the barrel projecting forwards from the mid-handle body with the rear tank containing nothing but an air tank. Thus this “Arbalete Pneumatico Santino” is somewhat the same, however it would be interesting to learn more about the internal mechanical layout.
