> The directions for a LOC EZI 65 call for drilling two small holes in
> the body tube 180 apart. I will most likely never fly on anything
> larger than an "I" which would put it around 2500'. Should I go ahead
> and drill anyway or is this just "overkill" for the lower flights?
From what I've heard, holes like that are to prevent your recovery system
from deploying prematurely. The air pressure outside the rocket is lower
than that inside the rocket, and this action tends to push your nosecone off
prematurely. I imagine it depends on the size of the body tube, the
altitude you're going to, and how fast you're getting there. I've never
seen a rule of thumb that governs when you need to start drilling tiny vent
holes in your rockets. A lot of people tend to do it if the rocket tube is
3 inches in diameter or more, or if they're going over 2-3000 feet. Wish I
had some sort of empirical data that shows when it's necessary, but when I
asked around last, no one could seem to give me a hard and fast rule. "When
in doubt, why not do it, just in case" is what I decided. Unless the holes
are too large, they won't hurt anything.