What does the motor designation I220-8 indicate about the rocket motor?

The correct interpretation of the designation I220-8 indicates that the motor has an average thrust of 220 Newtons with a burn duration of 8 seconds. This designation typically follows a convention used in rocketry to provide critical performance characteristics of a rocket motor at a glance.

The first part of the designation, "I220," signifies the average thrust level. In this case, the "220" clearly indicates that the motor produces an average thrust of 220 Newtons. The second part, "-8," denotes the burn duration, which is 8 seconds in this instance. This information helps rocketry professionals and hobbyists quickly assess the motor's capabilities in terms of the force it generates and how long it will sustain that thrust during flight.

This understanding is crucial for designing rocket missions, as thrust and burn time are essential for calculations related to altitude, speed, and payload capacity. The choice accurately reflects these characteristics, making it a central aspect of rocket motor specifications.