- Apr 30, 2009
- Reaction score
My son and I are building a 4 D cluster rocket. It's a BT80 based Patriot Missile using what I believe is a Apogee tube (we got it at a swap meet) that's fairly thin. I'm concerned about over pressurizing the tube if 4 ejection charges go off. Anyone know how I can calculate how much ejection (ie. how many motors with charge) I would need? The tube volume is about 127 cubic inches. Intuitively I think two would probably do it. Do you think I'd need to "plug" no-charge motors to prevent the pressure from escaping from the empty motor?