i was browsing around on instructables.com a few night s ago and came across this. How to make a pulse jet engine out of an old jar.

Linkage: here is your linkage

the videos on page 3 don't always work but there are plenty more on youtube. have the sound turned up nice and loud for full effect.

theres also an instructabe on how to make a coke can aluncer somewhere. i tried that a few nights ago and it works, but not very well...