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"Katran" double barrel pneumatic speargun

popgun pete

Well-Known Member
Jul 30, 2008
2,278
378
123
Australia
#1
Although not a particularly polished presentation you can see a double barrel "Katran" pneumatic speargun being discussed and demonstrated here in a Ukraine (I assume) dive shop.


The gun cannot be too highly pressurized given the way in which it is loaded against the dive shop floor and seemingly fired a couple of times into that same floor!!

A danger inherent in muzzle loaded guns of a double barrel configuration is you face an already cocked to shoot spear when you start to press the second shaft into the gun. Picasso have a patent on a double spear pneumatic speargun, but I have never seen one and do not know if they were ever produced in any numbers. Possibly it was a pre-emptive patent merely designed to register the idea without any intention of manufacturing it. Even if there is some type of lockout on the gun intended to stop you from being accidentally shot my view is that such guns are inherently dangerous unless they can be loaded from the rear and that is why there have been a few double shot band guns offered over the years.
katran double barrel.jpg
 
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popgun pete

popgun pete

Well-Known Member
Jul 30, 2008
2,278
378
123
Australia
#2
"Katran" appears to be a supplier/shop so I am not sure who made that double barrel pneumatic speargun.
https://katrangun.com.ua/podvodnaya-ohota/podvodnye-ruzhya-pnevmaticheskie/
I looked through 13 pages of spearguns showing all types of guns including Zelinka models using that moving inner barrel system, but no sign of the double barrel speargun. Some guns of interest are:-
https://katrangun.com.ua/podvodnaya-ohota-ruzhya-pelengas-varvar-70-s-regulyatorom-sm
https://katrangun.com.ua/samoe-dorogoe-podvodnoe-ruzhe
https://katrangun.com.ua/samoe-dorogoe-podvodnoe-ruzhe-zelinka-hlebnikova-perun-600-m
https://katrangun.com.ua/evgenij-korolevskij-zelinka-titan-600-mm
 
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popgun pete

popgun pete

Well-Known Member
Jul 30, 2008
2,278
378
123
Australia
#6
Thanks, so it is this one for the double gun
Ружье для подводной охоты "Двухстволка" or Shotgun for underwater hunting "Double Barrel"
 
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popgun pete

popgun pete

Well-Known Member
Jul 30, 2008
2,278
378
123
Australia
#7
Is there a web page or link where we can see the internal layout of this “double” gun and particularly how the lock-out device works for the cocked barrel on the gun. As mentioned earlier double barrel, muzzle loaded guns have a potential hazard when loading the second barrel as if the already cocked barrel discharges then the operator may be shot, particularly with a long barrel gun as the gun will be loaded off the diver’s foot. The only relatively safe double barrel gun was a double hydropneumatic where the first shaft was loaded in the usual way and the second shaft was pushed in with no effort and then that barrel charged with a lever operated hydropump working from the rear end of the gun. Such a gun is very heavy as hydropneumatic guns do not float being low water displacement and high density.
 
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popgun pete

popgun pete

Well-Known Member
Jul 30, 2008
2,278
378
123
Australia
#9
I can guess how it works as the twisting lever or screw action device in the rear of the gun tells me that it is a releasing valve gun and probably a Zelinka system. If you temporarily imprison the releasing valve in a Zelinka type gun then there is no possibility of a shot, unless the separate inlet valve "O" ring in the piston breaks and air can then flow in the reverse direction from the gun reservoir or tank back into the inner barrel. The same situation occurs in the "Alpha C1", if you screw the rear butt right up then the gun cannot shoot (safe mode). For a double spear, double barrel gun the second barrel could be another releasing valve system or a rocker type sear lever, probably the latter to keep the weight down. Even so a double gun will always have that risk of a spear ready to shoot and if the gun is torn from your hands by a powerful fish after the first shot then there is an armed gun being towed around on the end of the shooting line which could be very dangerous. Once I contemplated a double pneumatic speargun with a collet built into the muzzle that screwed down onto the second shaft which had a small diameter raised step to ensure that the shaft was properly caught, however the collet would be slow to undo and a second shot would be delayed.
 
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popgun pete

popgun pete

Well-Known Member
Jul 30, 2008
2,278
378
123
Australia
#15
Message already sent.

Захар предложил мне написать вам о вашей очень интересной двойной
пневматической арбалет. Мне интересно, если вы могли бы предоставить
некоторую информацию о внутренней планировки и функционирования вашего
подводного оружия. Мы смотрели видео, но как не-русский ораторов мы не
можем понять все, что сказано, однако некоторые аспекты очевидны из
изображений.

Дискуссия на форуме "глубокий синий "

Zahar has suggested that I write to you concerning your very
interesting double pneumatic speargun. I am wondering if you could
supply some information concerning the internal layout and the
operation of your underwater weapon. We have watched the video but as
non-Russian speakers we cannot understand all that is said, however
certain aspects are obvious from the images.

Discussion on forum "Deeper Blue"
 
Likes: Zahar