Water rocket launch from 5-28-05

Introduction
Cutting the channels for o-rings is one of those things that always seems to be glossed over in water rocket guides. One moment they mention cutting the grooves, the next *POOF*, the groove is cut and they’re talking about some entirely different part. For those who might be reading this section out of any sort of context, what I’m basically talking about is (to me) the single most important component in a water rocket launcher...the o-ring and channels.

Introduction
Sooner or later if you keep playing with water rockets, you're going to want to do some more complex rockets. That means splicing and/or painting. Unfortunately, clean bottles do not fall off trees (especially if that's where they land) so you're going to have to do the cleaning yourself. To save the more skilled people extra reading, I'll bottom line it for you...mineral oil and/or alcohol will get off most of the glues used (in the US) on soft drink bottles.