I have looked in several locations, but I have not been able to determine how much black powder to use for ejection. Is their an equation? I'm going to use a Madcow Squat for my Level 1 and it has a very small cavity for the parachute.
Ouch! I've only used 1.1gr for drogue and 1.5gr. for main with shear pins on my 4".Well,, a lot of folks use a down and dirty way to calculate ejection charges, 1gr for each inch of airframe diameter. 1" diameter = 1gr bp, 4" diameter = 4gr. ect ect ect.