NSU Delphin III

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 211.4 mph (340.2 km/h)
Power 110 hp @ 8,500 RPM[1][2]
Dimensions L: 3.7 m (12 ft)[3]
H: 1.1 m (43 in)[3]

The NSU Delphin III was a streamliner motorcycle that 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.[4] 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.[2] The engine used an unusual rotary supercharger related to NSU's eventual development of the Wankel engine.[5][6] In the supercharger, both a trochoidal inner rotor and epitrochoidal outer rotor spun around a stationary shaft.[6]

References

  1. ↑ 1.0 1.1 1.2 Walker, Mick (2000), Mick Walker's German Racing Motorcycles, Redline Books, pp. 200–203, ISBN 0953131122
  2. ↑ 2.0 2.1 Schneider, Peter (1997), Die NSU-Story (in German), Stuttgart: Motorbuch Verlag, pp. 389–409, ISBN 3613018535
  3. ↑ 3.0 3.1 Collections: NSU Delphin III, Technikmuseum Speyer, retrieved 2013-09-16
  4. ↑ Setright, L.J.K. (1979), The Guinness book of motorcycling facts and feats, Guinness Superlatives, ISBN 978-0-85112-200-7
  5. ↑ Louise Ann Noeth (May 2002). Bonneville: The Fastest Place on Earth. MotorBooks International. p. 73. ISBN 978-0-7603-1372-5.
  6. ↑ 6.0 6.1 John B. Hege (2006), The Wankel Rotary Engine: A History, McFarland, p. 27, ISBN 0786486589

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