Soar to New Heights with the 2026 Commercial Pilot License (CPL) Practice Exam – Ready for Takeoff!

Establishing the best glide speed during an engine failure en-route is crucial for maximizing the distance you can cover while descending. The best glide speed provides the optimal lift-to-drag ratio, allowing the aircraft to maintain altitude for as long as possible and to cover the maximum horizontal distance before landing. This is particularly important when you have lost engine power, as it enhances your ability to reach a suitable landing area or airfield.

In the event of an engine failure, maintaining this speed helps you maintain control of the aircraft and prevents an accelerated stall, which can occur if you allow your speed to drop too low. Pilots are trained to identify and memorize the best glide speed specific to their aircraft, ensuring they can react promptly and effectively in an emergency situation.

Other choices such as best climb speed and configurations like flaps full down may not be appropriate in this scenario. Best climb speed is not relevant when trying to maintain altitude after a loss of power, and deploying flaps may increase drag, further reducing the aircraft's glide performance. Adjusting the fuel selector valve, while important in different contexts, does not directly aid in managing an immediate engine failure situation.