dilwad wrote:
Seeing that pic of Brett's new gun got me thinking about barrel designs and forces. Thought I'd be lazy and avoid doing an experiment by asking the brains trust if anyone (hopefully legendary boys) has some info/spec on:
- Gun Rubbers E (youngs modulus/modulus of elasticity) or k (Hookean spring constant) values
or
- Spear velocities that their guns produce
Hopefully I'll turn it into a wacky barrel design to try out next summer.
Thanks
Was wondering about this myself earlier today so I just went through some video.
1.5m spear crossed a point on my screen in 0.1 seconds (go pro footage at 60fps, took 6 frames, possibly less)
So with pretty loose figures to work with, I get 15m/s and 54km/h
The gun is a 1m picasso asegai with 1 x 16mm rubber, fairly well worn in I think - would like to see what a new rubber would do