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v2 definition

Asked by: 2814 views Aerodynamics

hi

what is V2 and why is there no mention of rudder effectivity, only climb performance data.

what is vymc then, is that not V2 with the critical engine inop? the blue line.

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1 Answers



  1. Kris Kortokrax on Jul 03, 2019

    V2 is defined in 14 CFR Part 1.2

    “V2 means takeoff safety speed. ”

    Takeoff Safety Speed is defined in 14 CFR Part 1.1

    “Takeoff safety speed means a referenced airspeed obtained after lift-off at which the required one-engine-inoperative climb performance can be achieved.”

    There is no such number as “vymc”.

    If you want to know more about V2, take a look at AC 23-8C which deals with certification of Standard category aircraft and AC 25-7D, which deals with certification of Transport category aircraft. These ACs discuss the requirements for certification and the methodology used to determine the speeds.

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