RE: Is a lot of elevator needed to rotate, typical of heavier wingloading?
P-51''s have a long nose and therefore tend to be noseheavy. I have proven this from a 3.6 oz Strega EPP Mustang to the 60 size WM P-51.
I wanted to also add that not only is elevator efficiency lost with a nose heavy airplane, but a key factor in wing efficiency is lost as well.
The center of lift and center of gravity must be fairly close. My 2c