dustyyoungblood

Obviously there are tons of variables.... Open track/closed track/shaft size/band stretch%/ target fish/type of point and more..... but for sake of argument. Is there a simple equation/table/ or rule of thumb for estimating "effective range"? I know that Riffe does provide a listed range for each gun they make. I don't have any experience with using them, so I don't know how accurate the listed range is..... Anyone?

If would be useful to have a table to compare these variables to select a configuration that is just what you want. How will a 2x 5/8" band 50" gun compare to a 3x 9/16" band 50" gun? I am sure some

I suppose I can spend the next 30 years collecting all this data and bring it back to the forum

Dan

I think one of the first things to do is determine how range is measured. I used to measure from the tip of the gun, but at some point realized that this is not a constant. Now I measure from my eye to the target. I know at what distance I can see well enough to aim underwater, it's not just a matter of the gun's accuracy. I find that my vision sets a limit that is less than some speargun's purported range.

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Speardiver Gear

Don Paul

I have all the data up to 5- 5/8s bands on a 6 ' barrel.....this is easy.

Take the ''advertised range'', divide by the Young's Modulus of Elasticity while adding 10' for a ET and another 5' for any Ti on the gun.

If we post this here the Chinese will be building all the gear.

Cheers, Don

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''Great mother ocean brought forth all life, it is my eternal home''
Don Berry from Blue Water Hunters.
Speardiver Gear

metelin

ahhh wait a minute, i need to get a calculator

don't worry about range, instead work on your technic to get as close to the fish as possible.

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steve veros

in loving memory of paolo

LunkerBuster

3.5 times the shaft length is about where the gun will no longer penetrate an average fish. I use this based on a 7.5mm shaft which carries a lot of momentum.

the band configuaration has to do with how fast the spear will be going and the amount of recoil...that depends on the fish...for shooting a fast skittish fish like a YT snapper, or a bonito, you better have a light shaft that is a laser. to plug a fat grouper sitting in a hole, a stout heavy slow shaft willl fare better.

i still agree with dan, i estimate from my eye and try to aim as little as possible

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i like to spear fish

ladvr

Take the Jay Riffe shaft/band configuration "effective shooting range" numbers and divide by two. This gives you a good idea of range off the tip of your shaft.

Spearguns - Mid-Handle Series

abdullahddiver

are the effective shooting ranges of the riffes that exaggerated?

ddonnell

Very much so