The Rocket Motor Sizing Utility will help the user derive initial sizing estimates for use as starting conditions in the Rocket Motor Simulation Module. Generally, the rocket motor designer is given a list of performance requirements, which may include:

• Total Impulse
• Thrust vs. Time
• Maximum Thrust or Acceleration
• Action Time
• Rocket motor exterior case diameter
• Operating Temperature Range
• Storage Temperature Range
• Vibration & Handling Environment
• Minimal or Reduced smoke signature request

Based on these design constraints, it is up to the motor designer to generate potential starting solutions for further simulation and analyses.

The Rocket Motor Sizing Utility starts with some generic propellant thermochemical and burn rate information, grain diameter, and nozzle efficiency estimates and parametrically varies internal operating pressure of the rocket motor to generate a series of required nozzle areas and corresponding motor performance estimates.

Access the Rocket Motor Sizing Utility from the Interior Ballistics submenu under the Analysis Menu as shown below.

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