V Terms Here are a complete list of V Terms as printed in the FARs §1.2 thru §1.3, Part I - Definitions and Abbreviations. I know that this can be a bit confusing at first, but most are pretty logical and easy to remember. V Term Definition VA means design maneuvering speed VB means design speed for maximum gust intensity VC means design cruising speed VD means design driving speed VDF/ MDF means demonstrated flight diving speed VEF means the speed at which the critical engine is assumed to fail during a takeoff VF means design flap speed VFC/ MFC means maximum speed for stability characteristics VFE means maximum flap extended speed VH means maximum speed in level flight with maximum continuous power VLE means maximum landing gear extended speed VLO means maximum landing gear operating speed. VLOF means lift-off speed VMC means minimum control speed with the critical engine inoperative VMO / MMO means maximum operating limit speed VMU means minimum unstick speed VNE means never exceed speed VNO means maximum structural cruising speed VR means rotation speed VS means the stalling speed or the minimum steady flight speed at which the airplane is controllable VSO means the stalling speed or the minimum steady flight speed in the landing configuration VSI means the stalling speed or the minimum steady flight speed obtained in a specific configuration VTOSS means takeoff safety speed for Category A rotorcraft. VX means speed for best angle of climb VY means speed for best rate of climb V1 means 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. V1 also means the minimum speed in the takeoff, following a failure of the critical engine at VEF' at which the pilot can continue the takeoff and achieve the required height above the takeoff surface withint the takeoff distance. V2 means takeoff safety speed V2 MIN means minimum takeoff safety speed