Recent content by Jugman

I agree with the sentiment, but would says the AT-6 deserves the honor. Really were plenty of aircraft that could serve as primary trainers not that many that could function as advanced trainers.

I agree on the XF-12 and add the P-44 (the AP-4J/L version) and the P-69. The P-44 would have been one hell of a ground looper. I like the B-35 but it was not a good design. Quite frankly flying aren't all that good outside a couple of niche applications. That's why nobody builds them. When...

Mr. Faye had a conclusion in search evidence. His assertion that "America did not dominate aero-engine manufacture in the continental United States, let alone in the world market." is so ludicrous and demonstrably false that I can not take anything he writes seriously. His comparison of the...

I would wager it's a typo. Unless I came up with something new at the very end of its life.

Yes, the C9 and C10 had cooling muffs. They weren't particular common though. R-1830 index

All R-2800 and R-4360 had forged aluminum cooling muffs. Some later R-1830 (the C9s I think) did as well.

True but they were moving relatively small quantities. Keep in mind the shortest east to west distance across the United States is ~10% greater than the distance between Paris and Moscow. The US is huge. The economics and logistics of the US is far more complicated than it is for the UK or any...

Pretty much everybody did that. I think a couple manufacturers pre-war were actually doing it on a limited basis. If you're using an electric dynamometer, what in blazes do you think you're doing with all that electrical power? You're not just going to run it through a resistor you're going to...

The problem with this is the F4F didn't have enough space to mount a decent intercooler installation* with the R-1830. There's just no way to shove a R-2180 and a turbo in one. *The intercoolers discharged directly into the front of the wheel wells.

The thing is a non-staggered odd numbered two-row radial has only 180° of crank phasing. Not the 360° needed for even firing. Basically it's like having a bunch of two cylinder inline engines coupled together. You could compensate for this by using an offset crank but that introduces its own...

I the only B-25 manuals I can find that states this are" B-25 Pilot's Handbook for B-25J, TB-25J, and PBJ-1J, AN 01-60GE-1, 1-Apr-1947" and "Flight Operating Instructions - B-25J, AN01-60GE-1, April 25,1953" On another note. The V-1710F17R has 7413 parts and 925 part numbers The V-1650-3 has...

Dam phone.. The F29 and F30 were rated for 1725 at 3200rpm. It wasn't used in service because the tip speed was too high on the propellers. This was a problem for many US aircraft. The P-47D with paddle blade propellers and the B-25 were both fast at lower rpm. Late war and post war manuals...

The F4U uses a wing center section that uses the spar as the carry-through structure. This is a permanent part of the wing center group assembly and not a separate part. The F4F is what I was thinking of. This doesn't appear to be the case for the P-47. Dean lists the the weights of the wing...

Keep in mind some of these fighters ( F4F, P-39, P-47, BF 109) do not have wing center sections so their wing weights look comparatively better than they actually are.

Actually the cooling air for the exhaust is fed and discharged from several fixed vents in the belly cowling. These definitely could have been improved. Ditto the exhaust for the oil coolers and waste gates.