Hanna Reitsch demonstrated the Focke-Wulf Fw 61 helicopter to Lindbergh in 1937,Reitsch, H., 1955, The Sky My Kingdom, London: Biddles Limited, Guildford and King's Lynn, and he was the first American to examine Germany's newest bomber, the Junkers Ju 88, and Germany's front-line fighter aircraft, the Messerschmitt Bf 109, which he was allowed to pilot. He said of the Bf 109 that he knew of "no other pursuit plane which combines simplicity of construction with such excellent performance characteristics".Herman, Arthur. Freedom's Forge: How American Business Produced Victory in World War II, pp. 289–93, 304–5, Random House, New York .
