 At specific altitudes, exhaust produced by missile launches could cause an engine compressor stall.This led to the development of a bleed system that temporarily blocks the frontal intake ramp and reduces engine power during missile launch.With the TF30, the F-14's overall thrust-to-weight ratio at maximum takeoff weight is around 0.56, considerably less than the F-15A's ratio of 0.85; when fitted with the General Electric F110 engine, an improved thrust-to-weight ratio of 0.73 at maximum weight and 0.88 at normal takeoff weight was achieved.