During an engine failure in flight, what is the minimum airspeed to maintain a zoom/glide?

The minimum airspeed required to maintain a zoom/glide during an engine failure is a critical component of flight safety, particularly in multi-engine aircraft. The correct answer identifies 125 knots as the minimum speed necessary to achieve optimal glide performance.

This airspeed is generally determined through comprehensive aerodynamic testing and is affiliated with the aircraft's specific characteristics, such as its weight and configuration. At 125 knots, the aircraft is typically at a suitable lift-to-drag ratio, maximizing its glide distance and allowing the pilot to maintain a controlled descent profile without the risk of stalling.

Maintaining this minimum airspeed is vital as it ensures that the wings generate sufficient lift to sustain flight. Flying below this speed may compromise the aircraft's performance, leading to an increased risk of stalling and losing control. In contrast to the other speed options presented, 125 knots strikes a balance that is generally applicable to a range of aircraft types while ensuring safety during an emergency situation like engine failure.