Originally Posted by
some
Hello. Is there a good publication explaining not only what are those four segments of take off, but also why they have their criteria. Specifically, V2 during second segment. E.g. what happens if V2 is significantly exceeded during the second segment? Any mathematical models or real flight tests used to prove it?
Thanks.
Not sure if this answers your question at all or maybe I’m not understanding what you are asking. V2 is not the normal climb speed if that is what you are thinking when you are reading about these segments. We regularly climb just after takeoff at a speed that is at least 20kts above V2 until flap retraction. The airplane still flies and climbs well and you can really get as fast as the maximum flap speed which is very far above V2. The only time we would climb at V2 on a takeoff is if an engine is lost after V1.