NSU_Delphin_III Knowpia

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
Top speed	210.64 mph (338.99 km/h)
Power	110 hp @ 8,500 RPM
Dimensions	L: 3.7 m (12 ft); H: 1.1 m (43 in);

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]

References edit

^ ^a ^b ^c Walker, Mick (2000), Mick Walker's German Racing Motorcycles, Redline Books, pp. 200–203, ISBN 0953131122
^ "Over 210 m.p.h.". The Motor Cycle. 97 (2782). London: Ilffe & Sons: 169. 9 August 1956.
^ ^a ^b Schneider, Peter (1997), Die NSU-Story (in German), Stuttgart: Motorbuch Verlag, pp. 389–409, ISBN 3613018535
^ ^a ^b Collections: NSU Delphin III, Technikmuseum Speyer, retrieved 2013-09-16
^ Setright, L.J.K. (1979), The Guinness book of motorcycling facts and feats, Guinness Superlatives, ISBN 978-0-85112-200-7
^ Louise Ann Noeth (May 2002). Bonneville: The Fastest Place on Earth. MotorBooks International. p. 73. ISBN 978-0-7603-1372-5.
^ ^a ^b John B. Hege (2006), The Wankel Rotary Engine: A History, McFarland, p. 27, ISBN 0786486589

Wilhelm Herz auf NSU Delphin III on YouTube from Technikmuseum Speyer (in German)
d'Orléans, Paul (September 7, 2008), "1956: NSU Breaks 200 MPH Barrier", The Vintagent, retrieved 2013-09-16