Few hours ago,
D
Deleted member 68059
posted an interesting doc in the twitter:
link
The doc notes that Mustang (I ?) have had lower drag than Spitfire V, but some details can raise the eyebrows. 1st - engine type on the Mustang - the F32 is noted, and that one was the 2-stage intercooled version that XP-51J was supposed to get in 1945; obvious question is 'what engine was actually on the Mustang?'.
Then, Mustang did just 1 (one) mph more than Spitfire V, despite, at least according to the doc, it had 1150 HP at 19000 ft, vs. Spitfire V with 1130 Hp at 19500 (both values are with ram effect). Something seems amis here - the F3R engine even with full ram seems incapable of making more than 1100 HP already by 15000 ft, and if the better V-1710 is installed, like the -81, Mustang will make 390-400 mph between 17000 and 20000 ft.
Mustang tests.
Any takers?