I just recently played a single game where I flew an F4U-1,fully loaded with fuel, for several sectors while tracking a bogie and achieved altitude of about 27K...and the bogie turned out to be a single B-29 which I shot down in combat.
I did not film this sortie...I wish I had.
What was curious to me was the B-29 pilot's response to being shot down by a 27K F4U-1; his comment was something like...BS! No way you could catch me up here doing 324 mph! I think he was correct, IF, he had maintained his altitude and speed, but since I was climbing, the only way that I could have caught him was if he reduced his speed to engage me in combat from his guns...and he lost that battle.
Never underestimate the F4U, high, or low.
OH! And by the way, he called me out on channel 200 and said I only had one star and no kills! I "lol'd" and said something like; score says it all. You'd think that after 12 years I'd know how to kill a high flying B-29 who slows his speed so that I can catch him? What? He slowed down? Well, yes, figure the problem out...
if he is flying level at 27+K at 324 mph, how can my climbing F4U-1 catch and shoot him down without him slowing his speed allowing me to catch him and get within gun range?
If he has film, I'd love to see it!