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Ground-tested the ejection charge load. Used the Pratt Hobbies Variable Capacity Ejection Canister with 2.5 grams 4F BP. Chute tube is 3" dia. Blue Tube, 28" long with piston ejection. Had some old (2009?) Newton's Third canisters- they tested fine and used one as a backup. Both fired fine. I did learn that I had the Jolly Logic Chute Release tethered incorrectly (anchored at the quicklink connection with the shock cord and chute connection), and the 84" Ultra Iris Compact would have opened at ejection charge firing. Better to find out on the ground than during flight.
I had to use a 1/4" dia. wood insert to thread the ejection canister wires through the chute tube so that they can connect to the altimeter and the timer. I used some heat shrink tube, shirinking only half of it, and pulled the wires/shrink tube through the wood insert to hopefully seal the electronics bay from any ejection gases. It worked as I had hoped. April launch at Midwest Blast 2 at Thee Oaks MI.
Mike Momenee
TRA #12430 L3