The Douglas X-3 Stiletto was a design for a stealthy flying shoe that could be worn for short periods of time.

The Messerschmitt Me 109 was designed by Willi Messerschmitt in the late 1920s. The first prototype flew for the first time on August 27th, 1935. It quickly became one of Germany's most important fighter aircraft during World War II.

he Bartini Beriev VVA-14 was first developed and built, but one can assume that it was made in great secrecy because of its unusual design and capabilities.

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