This rocket flies good on an A8-3 engine. Unfortunately every time it goes out it comes back broken. The recovery parts have been torched several times. I added and carefully packed more wadding to the point it failed to eject and resulted in the second broken fin. This should be a good rocket, it flies good and is easy to pack but I've had nothing but bad luck with it and I don't blame the manufacturer for my problems. Point in case, 10-12-2013, my son put the launch rod safety cap on just before my daughter launched it. The launch guide tube ripped off, the rocket went up anyway, spun out of control, ejected, and still burned up the recovery system for the last time. Next launch will probably be with a C6-5 and the words farewell written on it. Like I said, it should be a good small rocket, just not for me.