THE LOVELY CAP MANUAL
This comes straight out the CAP manual, as does the answers to a lot more questions besides, if you know where to look that is. This manual is never talked about often enough in performance, if you know it and know where stuff is, it makes life a lot easier, espeially for Class A v speed questions and additional take off procedure questions. They literally GIVE you the answer!.
So in response to this question, I'd say turn to page 53.
In fact the "golden pages" are p46 (nice load of definitions for you, inluding a very speial one for V1), p53 (as mentioned above) and p64/65 (the two best pages).
In the Oxford feedback the cap manual answers the first six or seven question on the first two pages alone!!
Anyway.
Hope this helps.
Steve