1 results for "Features of the Aero Pack Motor Retainers Fits 38mm tubes with an O.D. of 1.630 inches, such as paper tubes from LOC" between $0 and $29

What does it do? Simply, it also holds the engine in the rocket so it can't be spit out by a strong ejection charge. A secondary feature is that it allows you to quickly swap out the used-up motor for a new one in seconds. It is as simple as screwing off a bottle-top. Just twist off the cap, swap out the motor, and twist the cap back on to hold the engine in place.