The US Navy demonstrates its 'Flying Platform' in 1955, a vehicle that uses a direct lift rotor aircraft, using contra-rotating ducted fans controlled by the pilot shifting his body weight around to tilt the platform. Development ceased because the US Army judged them to be impractical as combat vehicles as they were small, limited in speed and only barely flew out of the ground cushion effect.
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(via Everlasting Blort)The Presurfer
