A while back my friend Dave and I made one of the big ones with the 2 inch diameter.. We launched rachet balls straight up so high we lost site of em and on their way back down were whistling really loud.. We were using RC car fuel..
_________________________
-D Modifying and Tweaking is a journey, not a destination................................ MKIIa : 60gig - 040103286 - Blue - v2 + PCATS tuner MKIIa : 20gig - 040103260 - Blue - v3a8 + Mark Lord Special Edition Cherry Dock