No WEP for FW 190 A-9

[JtD]

Originally Posted by badatflyski

Source please, nothing about it in the BMW801C/D maintenance and repair manual...or i missed it completely.

Fw 190 A-5/A-6 Flugzeughandbuch Teil 7 Triebwerkbedien- und -versorgungsanlage, Dezember 1943, Page 34 gives the 10 and 20mm gaps.

Focke Wulf Bericht 06011 Flugzeugmuster Fw 190 mit BMW 801D Errechnete Flugleistungen Blatt 109 gives the difference of 15 to 20 km/h.

The radiator as large as it may want to be is always there and the only speed difference from adjusting the radiator will come from adjusting the cooling flap and thereby the airflow through it. That's the same thing as with the Fw 190.
Given that the Fw is an aerodynamically clean plane, screwing with these aerodynamics through radiator adjustments will have a large impact on the speed than it has on a plane with poor aerodynamics, like the Hawker Hurrican or a biplane.
In game the Fw 190 loses about 25 km/h due to open radiators.
Had the cooling fan been some sort of a compressor, the Fw 190 would not have achieved higher full throttle altitudes with external intakes - but it did.