1/2A-Class Model Rocket Engine
An 1/2A-class model rocket engine is a single-use engine designed to launch a model rocket. 1/2A-class rocket engines typically have the following properties:
- Total Impulse of .63-1.25 Newton-seconds
- Length of 2 3/4"
- Diameter of 1/2" (to fit inside a BT-5 rocket, or engine mount kit) (exceptions are the mini-engines)
