Which impulse class corresponds to a total impulse of 1280 Newton-seconds?

Which impulse class corresponds to a total impulse of 1280 Newton-seconds?

• A. "H"
• B. "I"
• C. "J"
• D. "K"

Answer: (C)

Total impulse class is determined by the motor’s total impulse value, which falls into specific ranges. Each class covers a band of impulse in Newton-seconds. The range from 640 to 1280 N·s includes 1280 N·s, so a motor with that total impulse belongs to that class. It sits at the upper end of this range, with the next class beginning just above 1280 N·s. So the 1280 N·s value corresponds to the class that spans 640–1280 N·s.

Total impulse class is determined by the motor’s total impulse value, which falls into specific ranges. Each class covers a band of impulse in Newton-seconds. The range from 640 to 1280 N·s includes 1280 N·s, so a motor with that total impulse belongs to that class. It sits at the upper end of this range, with the next class beginning just above 1280 N·s. So the 1280 N·s value corresponds to the class that spans 640–1280 N·s.