I am mindblowing my head to find out what is the effect of more flap setting in the ASDR.
I have some performance numbers, 737.
Constant weight/constant field length
FLAPS 5
V1 149 (Balanced V1)
VR 155
V2 163
FLAPS 15
V1 145-147
VR 149
V2 157
This new V1 range shows that not only TODR decreases (Vgo 145) but also ASDR increases a bit (Vstop 147).
Initially I thought that the Vstop reduction was due to lower VR but, this doesnt make sense obviously.
Taking into account ever possibility separately,
1) TODR with more "approved t/o" flaps is less due to earlier rotation (AEO and OEI)
2) ASDR should be also less, as far as I can understand, because of lower rotation speeds. The slightly less acceleration possibility is rulled out because the TODR is reduced with more flaps.
How the heck ASDR is slightly increasing?
I am misintepreting something.
