For a K1100 motor, which statement is true about its burn rate compared to a K550?

The K1100 motor burns out twice as fast as the K550. This is primarily due to the design and propellant characteristics of each motor. The K1100 typically has a higher thrust-to-weight ratio and may be designed for a more aggressive performance profile, leading to a shorter burn time compared to the K550.

Understanding the performance parameters of rocketry engines is crucial for predicting the flight characteristics of a rocket. In the context of rocketry, burn rate refers to how quickly the propellant consumes, directly affecting altitude, speed, and overall flight dynamics. Therefore, when comparing these two specific motors, the K1100 experiences a faster burn rate, resulting in a shorter operational period before the propellant is exhausted, thus explaining why it would burn out twice as fast as the K550.