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Old 06-21-2017, 08:53 AM   #37
Diving Gecko
Shooter & Shooter
 
Join Date: Nov 2014
Posts: 955
Re: Help Needed, DIY Jap Style Polespear

Quote:
Originally Posted by Ren View Post

I personally would rather run larger ID and less stretch in the case that I need more punch.
Oh no, Ren. I was hoping you'd say the opposite, haha.
I do think the math is for thinner bands (same power at longer stretch) as they will have more "travel" at which they can exert force on the spear before they go slack. Anyways, I can probably only really verify this by shooting penetration tests at thick foam and I am not going to waste my time doing that in Japan. So, I will cut one thick band and one thinner one and see how they feel;-).

Also, as mentioned above, I will try to rig the band so I don't waste any unnecessary band stretch. Spearos are going that way with reverse triggers and shafts with shark fins further back on their guns. On a polespear with a much longer band stretch missing out on a few inches has less of an impact, but it still feels weird to me when I see super long wish bones on many commercial spears.

Anyways, I have most of the bits and bobs, just waiting for the metal parts to show up.
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