Hogenbor:
The best overall Mossie book is (appropriately) "Mosquito" by Martin Sharp and Michael J.F. Bowyer. (Going from memory for the first names, but it's definitely Sharp and Bowyer.)
Unfortunately, the book doesn't have particularly good performance graphs - there's a couple stuck in there without reference to context, weights, yadda yadda. Best doccos are in the British National Archives, AIR18/716, again going from memory.
I also think there must be some performance-related documents in the reference library of the Mosquito Museum. I'm a member, but have not had time, during my brief visits to the U.K., to set up any time to look.