From: email@example.com (Gerald L. Hurst)
Subject: Re: Way Cool Vortex Cannon
Date: 9 Nov 1996 05:02:54 GMT
In article <9611072033591.DLITE.firstname.lastname@example.org>, email@example.com
(Douglas Ready) says:
>I am planning to build an improved vortex
>cannon from a heavy wall stainless steel
>200 litre drum ( looks pretty much like
>a USA 55 gallon ).
>Has anybody ever done or seen anything like
>this and care to offer any suggestions?
I've made a few vortices with explosives, including small shots of
condensed HE in 55 gal drums. I'd start with say 50 grams of
whatever explosive in the middle of a stack (1 or more) of truck tires
on the ground and go from there. The well-formed smoke rings from
such a shot move quickly at first then slow to a hover. The smoky
vortices are visually impressive and make a characteristic. noise
as they race upwards. Precision in the placement of the charge helps.
The tires are reusable indefinitely.
BTW, an upright 55 gal mild steel drum will tolerate 5 grams of
explosive (C-4) stood off from near the center of the base but the
bulging is pronounced.
The tire method is cleaner and lets you use a lot more oomph. I
have not used low explosives for such shots but I can think of
no reason why they would not work.