NSU Delphin III

The NSU Delphin III streamliner motorcycle set the motorcycle land speed record in 1956. Wilhelm Herz rode the machine to 211.4 miles per hour (340.2 km/h) at Bonneville Speedway in Utah, to break 200 mph (320 km/h) for the first time.^[5] Its fairing, designed in a wind tunnel at University of Stuttgart (then Stuttgart Technical College), gave it a drag coefficient of 0.19.^[1] The same engine powered Herz to a 1951 world speed record, with a less efficient frame/fairing, the Delphin I.^[3] The engine used an unusual rotary supercharger related to NSU's eventual development of the Wankel engine.^[6][7] In the supercharger, both a trochoidal inner rotor and epitrochoidal outer rotor spun around a stationary shaft.^[7]

NSU Delphin III

Delphin III in the Deutsches Museum in Munich
Manufacturer	NSU Motorenwerke
Also called	Dolphin III
Predecessor	Delphin I/II
Class	Streamliner
Engine	499 cc, 4-cycle supercharged parallel twin[1]
Top speed	210.64 mph (338.99 km/h)[2]
Power	110 hp @ 8,500 RPM[1][3]
Dimensions	L: 3.7 m (12 ft)[4] H: 1.1 m (43 in)[4]