Model Rocket Engine Naming Convention
The name designation for a model rocket engine is based on the engine classification, the amount of thrust it produces, and the delay between burnout and the ejection charge ignition.
For an example, a B6-4 model rocket engine would be:
- Class B (see the B-class engine definition, 2.51 to 5.00 Newton-Seconds of impulse)
- Provide 6 Newtons of thrust
- 3 second delay from burnout to the ejection charge
Please note that the last number can have a few variations:
- P means that the engine is plugged and there is no ejection charge.
- A value of 0 (zero) indicates this is a booster engine for a multi-stage model rocket.
Additional Nomenclature for Aerotech Engines
Model rocket engines from Aerotech have an additional field in their name.
For an example, a D15-7T Reload Kit 24/40 model rocket engine would be:
- Class D (see the D-class engine definition)
- Provide 15 Newtons of thrust
- 7 second delay from burnout to the ejection charge
In addition, the letter T after the 7 comes is the propellant type:
- R : White Lightning Propellant
- J : Black Jack Propellant
- T : Blue Thunder Propellant
- W : White Lightning Propellant
The 24/40 indicates the type of Reloadable Motor System required.
- 24 indicates a 24mm system
- 40 indicates the maximum thrust of reloadable motor