Recent content by RayB

The R-2800 produced 2000HP with 52" Hg of boost and 2840HP with 70" Hg of boost. Perhaps a linear projection doesn't work here but it doesn't sound like it would be necessary to go all the way to 150" to produce 3800HP. The Merlin produces 3800HP at more than(?) 150 in Hg but it does start at...

150 in. Hg! Really? The post above, from the US government, indicates that the R-2800 produced 2840HP with 70 in. Hg of boost. That implies that the R-2800 would require about 110 in. Hg of boost to produce 3800HP. In any case, could any air-cooled engine withstand 150 in. Hg of pressure?

Drgondog - The point you're making seems decisive. At the same power setting, the P-51H was about 20MPH faster than the P-51D. Why then did the P-51H in SAC service have a max speed of only about 470MPH when using water? I believe I've read that the P-51D had a max speed of about 450MPH when...

Confusion about V1650-9 power settings The data indicates that the V1650-9 produced 2200+ hp with 90” Hg using water injection and about 1600 hp with 67” Hg dry using 130 octane fuel. Something is missing here: what is the power output using 145 octane fuel without water injection? Wouldn’t...

At the beginning of the video, indicated air speed reaches 544MPH in what looks like level flight. Do you claim that such a speed can be reached without using full power?

Max speed for the Mustang at sea level was 370-375. For the Spitfire Mark IX, depending on the engine, 320 to 340.

The combat weight of the P-47M was 13,275lbs. See spitfireperformance.com.

After a lifetime interest in military aviation, I “discovered” this site a while ago and have learned a great deal from it. Some contributors are somewhat argumentative but that seems a small price to pay for the knowledge that they have. Still . . . I have lots of questions remaining. For...