I spent yesterday morning at the University of Pennsylvania library, browsing through the weekly Aviation News magazines from 1946 1947. I was looking for a specific article, and I found it!
The article was in the December 9, 1946 copy of Aviation News magazine. The article is titled "German Scientists Working for AAF". The article mentions Dr. Alexaneder Lippisch, Dr. Rudolph Hermann, Dr. Theodor W. Zobel, Fritz Doblhoff, Dr. Rudolph Ammann, and Dr. Heinz Schmitt.
Under Dr. Rudolph Ammann (my grandfather), it states that he is "the designer of the BMW-801 engine used in the Focke-Wulf 190 fighter. This is confirmation from the era (1946) that he was the designer.
Also, I received a copy of a newspaper article from one of my aunts. The article was written upon my grandfather's retirement from Wright-Patterson Air Force base. One paragraph states; "He conceived a unique single lever master control (kommandogerat) for the 14 cylinder radial engine (BMW-801) used in the Focke-Wulf fighter plane and increased the output of the engine from 1,350 to 2,400 horsepower".
It's great to find documentary evidence that my grandfather (Dr. Rudolph "Rolf" Ammann) was the designer of the BMW-801 aeroengine and the Kommandogerat. As described on the
Focke-Wulf FW 190 - White 1 web site, the Kommandogerat is "the master control unit-actually a mechanical computer- for the engine which regulates rpm, prop pitch, timing, blower speed all in relation to altitude. It is an engineering marvel!"
http://www.white1foundation.org/restoration_engine.htm