Description and Technical Data of Hydropneumatic Speargun.
Operating Principle of Hydropneumatic Speargun.
Technical Service of Hydropneumatic Speargun.
Spearshafts and Speartips.
Handgrip Position of Hydropneumatic Speargun.
Description and Photoalbum of Spearfishing Equipment.
Links.
Ukrainian
The modified Sten is also very interesting. At an 80 bar working pressure I can see why he wrapped the gun's outer body tube with Kevlar! I can also see that it was originally the "87 model" judging by the handgrip (I sent you the Mares parts diagram for this model some time ago), although it has been heavily modified with the new yellow grip. The winch and cable system would be the only way to load such a long gun, but may be a nuisance to carry in the water. Maybe he only needs one shot while lying on the bottom and shooting from ambush. I am surprised at the size of the large muzzle ports, there is not much metal left to hold it together. His braking system must reduce the impact on the muzzle, but perhaps it is made of stronger material. Your hydropneumatic system has a big advantage by hydropumping with multiple short strokes of the shaft, it eliminates the long travel of loading (and maybe bending) a pneumatic gun's spear. That is why he needs that winch. The cable would not want to break during loading! Regards, Peter Currer.