On Thu, 29 Nov 2001, Tim May wrote:

> If you mean something that runs on fairly conventional fuel, such as 
> diesel or gasoline or alcohol, t's unlikely that enough muzzle velocity 
> will be achievable in a reasonable-length barrel.

See srl.org.

In particular, the natural gas gun they used in the 97 show here in
Austin. It certainly didn't have a problem blowing the tops of the trees
out several hundred yards away (and that was with the slug of air it 
ejected - as it moved through the smoke you could see the donut ring
clearly).


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