Originally posted by funkedup
Just be glad HTC modeled the B so conservatively. Manufacturer's testing yielded top speeds in excess of 450 mph.
For the quote below I don't have it's original source. It was posted by Oleg Maddox to the
http://www.simhq.com's IL-2 Sturmovik message board. Oleg said that it was from a western historian. I'm just posting it to show a different view on the matter.
"The printed maximum speed in all books for the NA P-51D Mustang is 437 mph at 25,000 ft. Absolute nonsense. The fastest speed ever actually RECORDED for a P-51 ocurred on 20 October 1944, over Henden RAF base, England. Following RAF complaints that the P-51 would not reach the printed speeds, no fewer than 12 Mustangs from various units--two right off the boat, as well--were tested with USAAF pilots. Both theodolite units and radar were used to measure the speed. The fastest run--I should mention after innumerable flights occupying the whole day--
was 416 mph in a P-51B (s/n 36799 "Carolina Hustler"); this speed was sustained only for 10 seconds before the engine became seriously over-boosted. The longest sustained maximum speed recorded was 405 mph for 55 seconds by a brand new P-51D at 23,000 ft. (s/n 472484). Most of the machines in this evaluation were incapable of exceeding 400 mph under any conditions whatever. The NII VVS tested their P-51B (L-L, s/n 35145) to a maximum of 392 mph at 25,500ft, and climb to 5000m of 6.5 mins. (yes, on 100 octane gas). I suspect that this was exactly correct, despite the fact that all Wetserners try to explain it away. These two events are the ONLY scientific evaluation of the Mustang by any non-Company (i.e. North American) entity in the entire history of the aircraft. Both evaluations prove that the Company was inflating their numbers for 'advertising' reasons...."