How to Mount the Engine Assembly for Model Rockets

"In engine mount assembly I want to do a quick review. The engine mount assembly does include the engine mount tube, the centering rings for the engine mount and the engine mount clip. When you're mounting an engine what you do is you; the instructions will tell you where to mount various items of the rocket engine mount. And these instructions it tells you to mark your engine mount tube which is this at various locations. In this instruction set and this does not always happen; in this instruction set you're given a nicely convenient ruler in inches and quarter of inches, even I think it says eighth; it has eighth of an inches in here. So that you can measure where they tell you to measure your body tube; I'm sorry your engine mount tube. This is very critical because this is where each end of the tube; first the ability in the rocket to make sure that your engine is centered, it's secure which is very important so that when the engine or when the rocket launch; launches the engine doesn't fly threw the body tube and cause it, in the rocket world; the bottle rocket world it's called a "Cato" or catastrophic event."