takeoff decision speed


The speed from which a decision to continue the takeoff, following the pilot's recognition failure of the critical engine results in a takeoff distance to a height of 35 ft at V2; (takeoff safety speed). It will not exceed the usable takeoff distance or the speed at which the first action is taken to bring the airplane to a full stop that will not exceed the accelerate-stop distance available. V1 is dependent on aircraft weight, airport altitude, and ambient temperature. V1 must not be less than the minimum speed for control on the ground (VMCG), greater than the rotation speed (VR), or greater than the maximum brake energy speed (VMBE). Also called the takeoff decision speed. See also VMCG and VMBE.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
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The crew verbalized concerns with the flight controls as they began the takeoff roll but did not reduce thrust, activate the thrust reversers or apply brakes until well after V1, takeoff decision speed.