Originally posted by sramberg
Thanks for the insight.
"I plan on using masking tape retention, which should be strong enough since there is no ejection charge in the motor."
Sorry to have to burst your bubble... No matter how much tape you use, if you don't vent the burn thru gasses, your booster motor casings will be ejected. I have 3 models set up for B and C6-0 friction fit booster motos, Estes SR-71, Geo-Sat HLV and the Deep Space Transport, every single outboard booster motor casing is ejected at burnout. Which is fine by the way for sport flying!, As long as your not flying in a competition event motor casing ejection is perfectly legal, lots of commerical kits are designed to eject the casing. Ejectiing a motor casing is NOT a violation of the Model rocket SAFETY code, it is a violation of the pink book competiion rules, if the casing doesn't have an attached streamer.
Plugging the motor is also a violation of the Safety code and voids your insurance. Altering your motors in ANY WAY is never a goor idea. A little forethought will eliminate the need for such activities.
It is always better to vent the booster motors either out the side of the pod or back thru the centering rings and out the rear depending on the make-up of your model. a 1/4" paper punched hole is fine for b & c boosters, if your venting out the rear, back thur the centering rings a 1/8" slot on both sides of the ring work perfectly.
Another option is to use 19mm tubeing for the booster motor tubes, taping a 1/2" x 6" streamer to each casing. and let the launch office know to watch for the seperating casing.