109 e4 performance

[Kwiatek]

Originally Posted by Robo.

Nice job Kwiatek, just to remind you that the V15a was identical to series E-1 and it has had some problems to reach the guaranteed power output and the difference in PS had to be calculated, hence the staggered line. In this case the prototype certainly performed worse... As for the supercharger, that's just as you wrote, the V15a had the same supercharger also, but the test was commited without it on purpose (as per the test description).

I wonder how supercharger control - variable hydraulic speed or 2 postion could affect on performacne. Surly speed curve for hydraulic is smooth without power lost between gears but other hand it could casue some lost.

In V15a chart black thick line speed was made at 1.31 Ata power output - it reached 485 km/h with radiator 1/4 open. Still we need to remember that these is prototype NOT A SERIAL PLANE with different supercharger control.

Later German test show that standart 109 E-3 with Db601A at 1.3 Ata 2400 RPM reached 467 km/h at deck with also 1/4 radiator open.

http://kurfurst.org/Performance_test...MP16feb39.html

So i think speed for 109 E-3 with 1-minute emergency power depend of radiator settings ( 1/4 open or close) and type of engine Db601 A or DB601Aa was in range 485-500 km/h.