Yeah, it's a pulse jet. Coincidentally last week I was watching a program on TV called "Scrapheap Challenge" (sister program to "Junkyard Wars" in the US) where the two teams had to make jet powered cars in 10 hours entirely from scrap parts.
One team made a jet using a big truck turbocharger, and the other team built a pulse jet, which eventually won the challenge. Fascinating stuff, and at the time, owning an engine powered bicycle I thought, "Ooooher, a little pulse jet would be cool on a bicycle"!
Only problem I can see is that as it chews thru 1 gallon of gas every 2 minutes, or 30 gallons per hour, it makes a Hummer look positively thrifty! Cheers, Terry.
