Is the proper term rocket engine or rocket motor?
I don’t know. I don’t really care. And neither should you! In this document ‘motor’ and ‘engine’ are taken to mean the same thing and both refer to “the thing in the rocket which makes it go ‘whoosh!!’ (or ‘roar’, if flying high power :-)”. If you want a sure way to start a fight with a fellow rocketeer, just argue that whatever term he/she uses is the wrong one.
