V1 speed
From Wikipedia, the free encyclopedia
- The correct title of this article is V1 speed. It features superscript or subscript characters that are substituted or omitted because of technical limitations.
The V1 of an aircraft is the V speed which refers to the critical engine failure recognition speed.
V1 is the minimum speed in the takeoff, following a failure of the most critical engine, at which the pilot can continue the takeoff with only the remaining engines. Any problems after V1 are treated as inflight emergencies.
In the case of a balanced field takeoff, V1 is the maximum speed in the takeoff at which the pilot must take the first action (e.g., apply brakes, reduce thrust, deploy speed brakes) to stop the airplane within the accelerate-stop distance and the minimum speed at which the takeoff can be continued and achieve the required height above the takeoff surface within the takeoff distance. In this context, V1 is the takeoff decision speed.
