Standard to D Model Rocket Engine Adapter

This adapter is easy to use. When you need a smaller engine and the motor mount is for the larger, this is fast. Just pop the engine in and tape shut or no tape. If your engine mount is friction fit and no hook, then add a little tape. They get a little charred from the ejection charge, but no worries. Have used mine for many flights. The only time you will need to replace is if you lose the rocket or somehow manage to smash the plastic. One adapter equals two half pieces.