Norman,
Interesting post...although I stand to be corrected, I believe that some A320's in the basic configuration calculate VAPP as :VLS + 5 + 1/3 TWR HWC, as opposed to VLS+Max (5, 1/3 TWR HWC).
Also, I believe at 700 ft RA the current speed target is memorised by the autothrust to ensure stability. Something to keep in mind.
I was trying to figure out where you got 9kts from your THWC in the example you gave, then realised it should of been labelled 1/3 THWC (just woken up, need coffee).
Cheers.
Last edited by JSF1; 8th Mar 2008 at 09:33.