Dora maximum speed configuration

[69th_chuter]

 

 

It appears the Dora flies faster at the fully closed cowl flap setting than at 23% open cowl flaps.  German testing found the least drag cowl flap setting was was the fore mentioned 23% open.

 

Flight Performance Fw 190 D-9 with Jumo 213 A.

Erpr. Nr.9003
Teilber.2.

2 Mar 1945

[Arsenal53]

i can't go up to 1.5/1.55 ata at 3250 rpm with 100% throttle, and no more than 1.75/1.78 ata with MW50 engaged... am i alone or i missed something?

it was just a quick test flight and altitude was maximum 500/600m ...

[LukeFF]

59 minutes ago, Arsenal53 said:

i missed something?

 

Yes, fly higher. 

[SJ_Butcher]

On 3/18/2019 at 9:25 PM, Arsenal53 said:

i can't go up to 1.5/1.55 ata at 3250 rpm with 100% throttle, and no more than 1.75/1.78 ata with MW50 engaged... am i alone or i missed something?

it was just a quick test flight and altitude was maximum 500/600m ...

Between 3500-5400 the ata shluld be 2.02 AT full

[69th_chuter]

OK - it appears there is no actual "manual control" of the radiator flaps by the "manual control" knob on the dash.  Whether this is by design or not I have no idea, I guess the knob merely adjusts the reference temperature of the thermostat. 

 

If so, it makes the statement 

 

"The entire opening was divided into 10 equal parts, "0 = completely down" and "10 = completely up". The test shows that the speeds are greatest with a 2,3 radiator flap position (approx. flush), i.e. the speed loss is lowest. If possible, level flight should be flown at this position. "

 

a little awkward.

 

Flight Performance Fw 190 D-9 with Jumo 213 A.

Erpr. Nr.9003
Teilber.2.

2 Mar 1945

Edited March 23, 2019 by chuter