Complex sentence: The missile is propelled by a booster rocket that burns for 2.2 seconds, used to clear the missile from the launch pylon and solid rocket sustainer motor that burns for 28 seconds takes over propulsion and exhausts through two nozzles near the trailing edge of the wings.
Split into simpler sentences: The missile is propelled by a booster rocket that burns for 2.2 seconds, which takes it clear of the launch pylon, and two solid rocket sustainer motor that burns for 28 seconds. The sustainer motors exhaust through two nozzles near the trailing edge of the wings.