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It is also worth noting over in Europe pneumatic spearguns are very frequent winners of speargun competitions...
I agree, just to clarify for all I was referring to strictly speargun competitions where they do target shooting/power testing/accuracy competitions etc..I’m not so sure it that but I think that’s because of comp spearos being a conservative bunch. E.g. if you look at the World champs I don’t think (m)any of them shoot oleos, yet they all tend to be Med guys.
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I agree, just to clarify for all I was referring to strictly speargun competitions where they do target shooting/power testing/accuracy competitions etc..
How has the reliability been of the Mares mirage been at 33BAR Gecko?
Yeah, I have been thinking about this method too lately. What's cool about @quakeos approach is that he is trying to do all this with as few custom parts as possible. He could eventually sell or share plans for a new front of the muzzle and an adapter for the pump.
I guess he hangs the pump on his float between shots but personally, I wouldn't mind a smaller pump, perhaps a lever type one. I wouldn't mind an increase in pump strokes if it gave me a much more storable pump.
If I was having a go at making this work for me, I would probably make a pump half the length of the Salvi pump perhaps with some sort of better hand grip at the muzzle end of the pump so I could really put some force into it. But I would want the pump small enough that I could stick it on the belt.
While the safety issue is certainly present, I think the least attractive part of the "muzzle pump" setup is that I would have to lift the gun upside down out of the water when inserting the shaft. I'd really like not having to do that with a 150ish cm long shaft in bluewater and waves. I suspect that's how Chris is loading this gun and if not, then that's probably why he had water behind the piston.
[edit]...We forget even at 20 bar just how much stored energy these spearguns have and how skyrocket-high efficient they can be! [edit]...
[edit]...As for stored energy, at say 20 bar, we don’t really have more than a 2-banded gun, right? I think we have less and way less than some pulley guns. But we have better efficiency. [edit]...
50 bar
D=8 mm