[Leo Etgen]

Hello Pihl

Many thanks for the link to the document. However, I am somewhat confused as I did not see any reference to Erhöhte Notleistung but rather to erhöhten Startleistung (2,700 U/min. @ 1.42 ata) and erhöhten Steigleistung (2,400 U/min. @ 1.32 ata). If I am correct these are the settings when the boost limitations of the BMW 801 D-2 were released and the engine was cleared to run at full power. The earlier de-rated settings were Start- und Notleistung (2,450 U/min. @ 1.35 ata), Steig- und Kampfleistung (2,350 U/min. @ 1.28 ata) and Dauerleistung (2,250 U/min. @ 1.14 ata). This appears to have occurred by 12 October 1942 for what I have read. If I am understanding correctly, by mid-1943 the improved BMW 801 D-2Q with revised exhaust among other changes thus increasing output to 1,800 PS was being installed on the Fw 190 A-6. Erhöhte Notleistung which was serialized in July 1944 on the Fw 190 A-8 added another 250 PS but was rather rough on the engines. It is possible that this system was available previously as a field modification but I am not certain and would like to know if this was indeed the case. In December 1944 Alkohol-Einspritzung began to be installed in some aircraft due to the shortage of C3 fuel. This was the system used on the Fw 190 D-9 as well. Any comments or corrections to the above would be greatly appreciated as I am far from being knowledgeable about this area of research.

Horrido!

Leo