Recent content by GregP

Here's a file of WWII Japanese Aircraft data for both IJN and IJA. It's not complete, but has a lot of data in it. Cheers.

Thanks! Here's a file of over 3,000 airfoils. Cheers!

Hi SparotRob! I show 1,850 Fw 190Ds of all dash numbers delivered, with 1,630 delivered in calendar year 1945. That's a mess of Focke-Wulfs, for sure. I'm wondering if the Ta 152s were made on the same assembly line, but answering random questions about Focke-Wulf late-war deliveries is not...

In this case your thinking is likely correct. There are rumors and speculation that as many as 150 Ta 152s were built or at least started their way down the production line. The summary of all the references I have examined tells me there were about 69 delivered in total and about 44 that...

Doubt there was no switch. A total of 3 D-12 and 17 D-13s were built. The Ta 152, even with 11 variants, had at least 44 delivered and perhaps as many as 150 airframes started production. It's pretty clear evidence of a switch to the Ta 152 when the standard Fw 190 stops being built and the Ta...

After the Fw 190D-12, they switched to the Ta 152 design, which was a modified Fw 190D, for all the inline, liquid-cooled engines. It has a fuselage plug and modified wings. I don't find much, or almost anything on the Fw190H. The Ta 152C and H were good airplanes with not enough time to be...

I don't think you'd ever see them with identical engines under ANY conditions.

A clean, heavy airframe has a good zoom climb, after which you go to sustained rate of climb. It likely has a high top speed. A light airframe has a better sustained climb and better acceleration. Top speed depends on drag and power much more than weight. So, rate of climb is tied closely to...

Thanks, 33k! Here's one you guys might like. It's not complete, but has many tables from the Statistical Digest of World War Two. So, it's USAAF, but not USN/MC. If anyone adds tables, please share what you added. I have found several errors in table math. Can't tell if the data are wrong or...

I really don't get it, Tomo, but ... that's OK. I don't have to get it. Allison was in the engine business. Everyone in here knows the V-1710 needed a high-altitude boost system and that was either a 2-stage supercharger or a single-stage coupled with a turbocharger. The letter I saw merely...

Suspicion meter for what, Tomo? That I saw such a letter? Allison never developed a single, 2-stage integral unit and I have no proof the letter I saw was ever sent out to anyone outside Allison. It could have been in internal memo that was intended for the USAAC/F but was never actually...

Sorry Tomo, I looked at the content of the letter and didn't really notice the date. It said words to the effect: "Allison Engineering proposes development of a 2-stage, mechanical supercharger to be fitted to the V-1710 series of aircraft engines to materially increase the altitude performance...

True ...

Here's an Excel file that does two things. 1) You enter an altitude in feet (also converted to meters for convenience) in 1) and the standard values (values on the mythical "standard Day") are shown in 2). 2) You enter one of several boost values and all the others are calculated on the same...

For those of you who might be interested, here is an Excel file to convert among boost units. Some are absolute pressure and some are gauge pressure. In practice, you don't really have to convert very often. Any aircraft you fly HAS a boost or manifold pressure gauge (or readout) and the numbers...