In July 1944, Beaumont had his Wing using 150 fuel. At 500ft his a/c was doing 415mph.

Just keep it in the 1000 meter range and you'll be closer to the maximum speed in the stage 1 supercharger setting and be able to outrun almost everything. At sea level the FW190D-9 with MW50 (the 1945 model) is faster than pretty much everything...even the super fast La-7 is left in the dust at sea level.

First TA-152C is not more rare than Tempest +13, actually atleast for the TA-152C you can find some real data instead of anegdotal data for the Tempest+13, talking about grains of salt lol.
Also please do not make me laugh with "thousands of Tempests" statement, all Tempests together ever produced don't even reach 1500 and that's throughout the poduction including all models MkV and MkII and MkVI as later variants. Not to mention that if my memory serves me correctly there was about 800 MkV's produced ever, note - EVER, not just during the war. For comparision there was 1805 FW190D9's produced before the war ended.

You mean that calculated data for the DB603LA powered Ta152C?

Four prototypes of the Ta152C is a lot of a/c, be sure.

Where did I say that's a lot?

Actually there were over 1700 Tempests built, including the Tempest II's. Of course, only the Tempest V flew in combat, (801 built) but then, the TA-152C never saw combat either. 452 Tempest II's were finished prior to the end of WWII, compared to 4 TA-152C. They could have been rushed into combat, but the Allies were already well in control of the war in the air, so these aircraft were kept back for more comprehensive testing.

And who mentioned 190D9's? Certainly not me. Although by the way, many of those 1800+ D9's ended up stuck on factory floors and never made it to the Staffel, because of lack of transportation and fuel to get them to the airfields.

As far as real data for the higher boosted Tempest, does this look like 'anecdotal' data?:

http://www.wwiiaircraftperformance.o...wker-12lbs.jpg

394 mph at sea level. And that is a Sabre IIA engine at 3700 rpm. The game's Tempest barely does 376 mph.

The Sabre IIB with only +11 boost reved to 3850 rpm and produced more hp.

http://www.wwiiaircraftperformance.o...-sabre-IIb.jpg

410 mph at 4500 ft. The game's Tempest does 381 mph, 29 mph (46kph) slower.

Even the +11 boost Tempest would wipe the floor at low and medium alts with the TA's, or D9's.

Charts courtesy of Mike William's site.

Not according to Thomas and Shores in their book 'The Typhoon and Tempest Story'. They have 1399 Tempests built.

Contract B12148/39 - 300 built - Tempest Mk V
Contract ACTF/1640/C.23(a) - 2 built - prototypes
Contract ACTF/1876/C.23(a) - 100 built - Tempest Mk V
Contract ACTF/1986/C.23(a) - 2 built - prototypes
Contract ACTF/2439/C.23(a) - 50 built - Tempest I, built as Tempest II
Contract ACTF/2438/C.23(a) - 100 built - Tempest II
Contract ACTF/1876/C.23(a) - 200 built - Tempest Mk V
Contract ACTF/1876/C.23(a) - 142 built - Tempest Mk VI
Contract ACTF/2438/C.23(a) - 302 built - Tempest Mk II
Contract ACTF/1876/C.23(a) - 201 built - Tempest Mk V

http://i15.photobucket.com/albums/a3...Ta152Data1.jpg


http://i15.photobucket.com/albums/a3...Ta152Data2.jpg

Still, not even calculated data for 13lbs, probably because both Sabre engines couldn't handle 150 grade fuel as it's well documented in every book dealing with Tempests.
Sure they did tests with it, but engines couldn't deal with it, that's why full 11lbs came for SabreIIb which did not need 150 grade fuel for 11lbs.

Oh Brain, W/Cdr Roland Beamont had his Wing (3, 56, 486 Sqns) using 150 grade fuel and 11lb boost in July 1944.

Codex, nice chart but no Ta152 flew with the DB603L engine. The V 6, 7 and 8 used DB603E engines. Calculated numbers, they are.