I am looking for peoples opinions on these things, specifically for a 12in
I have an airframe with a 11in ID that has a 24in space between bulk plates.
The NC is 10lb(might be 20lb after nose weight) and the parachute is 10lb.
At an expected altitude of 6000' the pressure difference is 3PSI.
This would put ~330lb of force on the nosecone(assuming no leaks) enough to
break shear pins and seperate the NC.
So I was thinking of adding a 1/4in vent hole. Bigger? Effect on ejection
I am considering 4x #4 pins. These break at about 70lb each for a total of
280lb of retention force.
I would break these with a 4g -->5g charge, still need some test firings.
Thats all, just looking for opinions, good or bad.
18 years ago