Russell,

On Fri, 01 Sep 2006 19:47:35 +1200, Russell McMahon wrote:

> Build a valveless LPG powered pulsejet in 2 hours.
> (Learn to weld first)
> Well stocked pipe and plate box useful.
> 
> Might even be real.

Did you miss the episode of Scrapheap Challenge (I believe it's shown there) where they had to build jet powered drag racers?  One team used a 
turbocharger and homebuilt combustion chamber, but the other built a plusejet using just tubing, and it was very effective (I think it won the drag 
races 2:1).  Scarey, though, sitting with your head only inches in front of a set of glowing red pipework.  OK there was a heat shield, but I wouldn't 
have done it!  The loud bang when it was started, using an electric fan to get the initial compression, was frightening enough...

I felt it was a bit of a cheat, since the three contestants had no real knowledge of the subject, and their Expert had a design all ready to be built, 
measurements and all.  Still impressive, though.

Cheers,


Howard Winter
St.Albans, England


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