Which motor in the given examples is NOT a High Power Rocket motor?

Which motor in the given examples is NOT a High Power Rocket motor?

• A. An F90 with 40 grams of propellant
• B. An H60 with 62 grams of propellant
• C. A G35 with 66 grams of propellant
• D. All of the above are High Power Rocket Motors

Answer: (C)

Total impulse determines the motor class. Low Power motors are designated by letters A through F, while High Power motors begin at G. The letter tells you the range of total impulse the motor can produce, not the amount of propellant alone. An F-class motor like F90 is in the Low Power category, so it is not a High Power Rocket motor. A motor labeled H-class (H60) and a motor labeled G-class (G35) are both High Power. Therefore, the only motor that isn’t High Power among the examples is the F-class motor, F90.

Total impulse determines the motor class. Low Power motors are designated by letters A through F, while High Power motors begin at G. The letter tells you the range of total impulse the motor can produce, not the amount of propellant alone. An F-class motor like F90 is in the Low Power category, so it is not a High Power Rocket motor. A motor labeled H-class (H60) and a motor labeled G-class (G35) are both High Power. Therefore, the only motor that isn’t High Power among the examples is the F-class motor, F90.