I always liked these engines,and the history behind them. Ol Henry had people in Spain during 1938 and 1939 and was made aware that the Germans were testing an advanced fighter Messerschmitt built. Henry's sources somehow managed to get 4 of the German engineers to defect and come to work at Ford where they designed the 12 cylinder aircraft engine complete with mechanical fuel injection. The engine was tested by the Army Air force and found superior to what was available in that time period, but politics dictated a more conventional engine approach without the injection. The tank engine used carbs at the request of the Army.