[Bearcat]

The P-51 was designed to be a high altitude escort fighter.

Its flight characteristics are optimal at high altitudes.

It is not designed for tree-top level dog fighting, which perhaps explains your difficulty.

Best,
Lefty

True but not true... From all accounts I havce heard.. personally and on paper... the Mustang was a pretty good fighter at any altitude... as long as you kept your speed up.