Kurfürst - Bf 109 Performance Resource site UPDATEs

[whazaa]

Originally Posted by *Buzzsaw*

Salute

For a period of time, the 190A3 and A4 were derated to 1.32 ata boost pressure from the normal maximum of 1.42, because the BMW 801D was having problems with overheating and damage to the engine. After the problem was resolved, the allowable boost was increased back to 1.42..

none of the 801D series had pb's with overheating, the C series did and the modifications on the C-series gave birth to the D series.
No D series seems to have been derated ,except for the first 10 work-hours.
(usual procedure)

Originally Posted by *Buzzsaw*

The Soviets and British both captured models which were derated...

The british did "received" a A3 but was it really derated? the first repport (that you won't find on the williams's page... ) quotes the admission pressure used while comparing the A3 to the spit5/9-p51b/p38f/typhoon. It was 1.42Ata. the second test you can find at spitfireuberalles's page indicate a maximal pression of 1.32ATA and only a max of 2450 Rpm used in the test instead of the 2700 used on the first comparative test...for the same plane!

The soviets captured a 190 with the spinner out and placed a stuka spinner on it! it's like testing a ferrari430 with a 60' V6 engine or a Renault5 1.4L with 18" wheels!

Originally Posted by *Buzzsaw*

In any case, by using manual prop pitch in IL-2 a 190 pilot, (all models) can get BETTER than historical performance out of the aircraft, (something which wasn't the case in real life, the Kommandogerat system was more efficient than operating manually) so you can see that there is no conspiracy against the 190's.

and overheating like a piggy in menopause when doing that.

No consiparcy???

and what about the acceleration? the spinner not getting at it's optimal angle?...and more....and more...and more...

Originally Posted by *Buzzsaw*

In fact there are quite a few more Allied aircraft which are modelled on lower performance versions than German. The Tempest is just one example, being modelled at +9 boost in IL-2, only 5% of the Tempests made used that boost setting, most operated at +11 boost, and some at +13.

yeah, right and having a Cx of of a Saturn5 rocket! beeing able to turn faster and shorter than a 190! Read the repport on william's page on the test Tempest Vs 190A3 and about the 5% at9boost, do you have any exact data on those +/-450 airframes build? Cause i could also tell you than from nov43, all the 190 received a 1.65ATA 801D engine build with parts of the 801F type engine, but would you belive me without any orginal source?