VYSE

VYSE Definition

VYSE, also known as Best rate-of-climb speed (BRCS) with one engine inoperative, is a critical concept in aviation. It refers to the airspeed that enables a light twin-engine aircraft to gain the maximum altitude in a given period of time following the failure of one engine.

In a scenario where one engine fails in a twin-engine airplane, VYSE becomes the optimal airspeed to maintain in order to minimize altitude loss and ensure maximum climb performance. At VYSE, the aircraft is able to climb at its highest angle of climb, which results in the most efficient use of available power.

Maintaining VYSE is crucial because any other airspeed, either higher or lower, will result in a suboptimal climb rate. Flying at a speed higher than VYSE, for example, will cause the aircraft to gain speed but lose altitude, while flying at a speed lower than VYSE will cause the aircraft to gain altitude but lose speed. Both scenarios lead to inefficient climb performance.

VYSE values typically vary depending on the specific aircraft type, gross weight, density altitude, and the number of engines in operation. Pilots must consult the aircraft’s performance charts to determine the appropriate VYSE value in different flight conditions.

In summary, VYSE is the airspeed that enables a light, twin-engine aircraft to climb to its maximum altitude in a given period of time following an engine failure. It is a critical concept in aviation that helps pilots efficiently recover from engine failures and ensures safe flying.