Build your own cruise missile (and other fun stuff)
Probably old news for many readers but this site interested me; the owner is an expert on pulse jets (as used in the VI missiles of WW2), recently appeared on Junkyard Wars and is currently trying to build his own cruise missile for $5000. Sounds like good clean fun.
And so to bed...
Later edit: Sorry, Scrapheap Challenge, not Junkyard Wars