Flex T/O vs. V1/Vr
Hi y´all!
New to this forum i came here thanks to google and i will try to find an answer to following:
Im flying F70 and F100s but i think the question can be valid for all aircraft.
Why is it required to increase V1 and Vr values when using Flex T/Os?
I mean, theres a note on the Take off and landing cards (Speed booklet) saying that you have to increase V1 and Vr by 1 knot every 5° OAT above 30°. The manual says that this also applies for assumed OATs. eg 4 knots more when using flex 50° T/O.
I can imagine some answers but i think they are not 100% correct.
Thanks in advance and
kind regards
Leo