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E-Class Model Rocket Engine
The E-class model rocket engine is for launching fairly large model rockets, and these engines come in two different variations. This is the largest that black-powder based model rocket engines can be safely manufactured.
- The most popular is the Estes E-class single-use engines, which are designed to be used in Estes model rockets.
- Aerotech reloadable model rocket engine.
Single Use
- Made by Estes, intended for Estes model rockets
- Total Impulse of 20.01-40.00 Newton-seconds
- Length of 3 3/4"
- Diameter of 1" (to fit inside a BT-20 rocket, or engine mount kit).
Reloadable
- Made by Aerotech, intended for highly qualified rocket builders.
- Total Impulse of 20.01-40.00 Newton-seconds
- Diameter of 1" (24mm) (to fit inside a BT-20 rocket, or engine mount kit).
- or, Diameter of 1.13" (29mm) (to fit a 29mm engine mount kit).