Re: air canon question... T-30 !!!! [TANKS]

["Aahz." <ErickKilmer-at-comcast.net>]

Steve Edwards wrote:

> note #1:   If you're going to use PVC for an air cannon, make sure it's 
> pressure rated.
> 
> note #2:  When PVC fails under pressure, it doesn't just crack -- it 
> explodes violently.
> 
> note #3:  Popoff valves are a very good idea.
> 
> Rule of thumb for reasonable performance from an air cannon using 
> "lightweight" projectiles:
> 
>    barrel length = desired fps / 20 ( ~15" for 300fps)
> 
>    air resevoir volume = barrel volume x 2
> 
>    resevoir pressure = 80-100psi
> 
> Theoretical performance for a .69 x 12" (17.4 cal) bbl with 9cu-inch 
> resevoir -at- 100psi and a .62cfm valve: 288fps
> 
>    - Steve "yes, it's another spreadsheet" Edwards

        So, the long and the short of this is... what? Is it reasonable to 
build an aircannon for this scale of tank?

Erick
(I think we need a spreadsheet just to track all the Steves)