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Idea for a long-range/hi-power mini speargun

Thread Status: Hello , There was no answer in this thread for more than 60 days.
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deirmendjian

New Member
Aug 25, 2005
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Waylayed away from decent conditions in the south-east in the UK, I've been drooling thinking about coming home to the California coast for Christmas. Naturally, when I'm not reading, studying, eating or drinking, my mind floats off to my other obsession: modifying/making spearfishing equipment.

I just dropped mad cash on a Mares "mini mini" Sten. The range is supposed to be 10+ feet, which is great for a 16.5 inch gun. But that doesn't stop me from wanting more. I've been thinking about this for a bit now. Why not get a small bit of latex tubing, with as large of a wall size and outer diameter as possible (maybe 2 or 3 inches OD, small ID), retrofit it onto a JBL mini-carbine or something along those lines, and wreak havoc with that? I anticipate many objections.

1. Small ID is tough to work with, may not be optimal. Make it a bigger ID then.

2. A small shaft is NOT going to go that far in the water, no matter how much power you put behind it - the principle of diminishing returns (that's economics, not physics, but oh well). Point taken. But the penetrating power is likely to be better with a bigger, stronger band, as is shaft speed, so I still think it could be worth tinkering with.

3. The increase in power will make it difficult to fit/clip/harness the band in a way such that it is not always dangerously at risk of snapping. That's a problem that can be remedied by careful, cautious knot tying and using the right sorts of materials, plus stress testing before harnessing your band-rig on the gun.

4. The increase in power may decrease accuracy: small guns can't handle it. That's a problem I don't have an answer to; maybe add a wrist harness of sorts, ala the old Wrist-Rocket, to remedy this problem.

Imagine a mini (under 20") that you could take monster fish with from good distances (20 feet +). This, my friends, is the holy grail of spearfishing. Or is don quixote getting the best of me?

The same principle, I think, could apply with full size guns. Why have 3 or 4 smaller bands - making your gun a royal pain in the ass to cock - when you can have one oversized band? For some this may make the gun impossible to cock. For people with good upper body strength, though, this seems to me a better option. I'm imagining a gun with a foot-stirrup and a lever-mechanism attached to the band that would make cocking easier, a gun that would have the added advantage of being able to launch grooveless freeshafts.

Thoughts?
 
"I just dropped mad cash on a Mares "mini mini" Sten. The range is supposed to be 10+ feet"
I think you are going to be very dissapointed in the range department when you get in the water...................
cheers
dave
www.spearo.co.uk
 
I think big rubbers are a waste of time, I am not superman but I found the 20mm bands on RA guns a bit much when new.
I would prefer to use 2 smaller diameter bands to give more power than one big one that is not only hard to pull but also more dangerous should anything break or give way.
The consequences of a failure when pulling a 22mm band would not bear thinking about, severe lacerations would almost certainly be the result.
Why do you need a "don quixote" gun anyway?
a 75cm rubber gun will shoot further with more accuracy than ANY hopped up 16" pneumatic.
 
Huan and David,

I hunt in southern california, on shore-dives around rocky structures, so I find myself doing just fine with a pole-spear most of the time. I wanted the sten for certain "situational" circumstances: i.e., taking on a holed-up fish, hunting in the kelp (where range doesn't matter half as much as maneuverability does). The 8mm shaft is supposed to pack quite a punch, and though it was expensive, I'll measure its worth with how many fishes it manages me over the years to come. If it ends up being shitty . . . I'll send it back, but I think that it will suit me just fine for my purposes.

I know the idea is impractical, but one of my favorite ways of wasting time is to spend it tinkering with spearfishing stuff. The idea of a small (no more than 30") long-range speargun with a single large band is still tantalizing to me - I think it can be managed, with reasonable safety, with some creativity and ingenuity. Anyhow, I'll let you know if I ever get around to making one.

James
 
Build a Roller gun if you want high power in a small package.
You may need to use a heavier spear 7.5mm? but the overall result will be a small maneuverable gun with plenty of power.
I think Seatec make one, (albatross?) ask Dave as he is the dealer for Seatec.
 
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