Friday Update, February 10, 2012

[Kurfürst]

Originally Posted by Varrattu

The value 500 km/h is presumably taken from a Yugoslavian translation of one BF109. I cannot find any German Document with such data.

Regards Varrattu

Bf 109E was rated at 500 km/h at 1,35 ata, 570 km/h at altitude. Production tolerance was +/- 5%. The data is from the official German specification sheet of 1939 for the Bf 109E type.
(the yugoslavian manual you have seen is a translation of this document)


BAUBESCHREIBUNG für das FLUGZEUGMUSTER MESSERSCHMITT ME 109 mit DAIMLER-BENZ-MOTOR DB 601

Transcription of Part V, Performance datasheets, are found here:

http://www.kurfurst.org/Performance_...chreibung.html

The relevant speed curve from the above document:



The current Bf 109E is way too slow, it does about 460 km/h at 1,35ata, and 470 or so at 1,45 ata. [/u]It should do 500 km/h at 1,35ata (1015 HP).[/u]

It should do more than 500 km/h at 1.45ata (1175 HP), obviously. Power requirements increase on the cube for speed, so that means with +15.7% power, you will get around +5% speed, or about 525 km/h at 1.45 ata.

In the below actual flight trial, 498 km/h was achieved with the Bf 109E-1 prototype, the was identical to the serial production airplane in equipment etc (the engine was not developing full power at the tests, and achieved 493 km/h. They have corrected the figures for full nominal power at 1.35ata)

http://www.kurfurst.org/Performance_...w_109V15a.html