UK), 1965. C Jones (Curtiss-Wright), "Rotary Combustion Engine is as Neat and Trim as the Aircraft Turbine", SAE Journal, May 1968, Vol 76, nº 5: 67–69. Also in SAE paper 670194. Jan P Norbye: "Rivals to the Wankel", Popular Science, Jan 1967; 'The Wankel Engine. Design, development, applications'; Chilton, 1972. T W Rogers et al. (Mobil),"Lubricating Rotary Engines", Automotive Engineering (SAE) May 1972, Vol 80, nº 5: 23–35. K Yamamoto et al. (Mazda): "Combustion and Emission Properties of Rotary Engines", Automotive Engineering (SAE), July 1972: 26–29. Also in SAE paper 720357. L W Manley (Mobil): "Low-Octane Fuel is OK for Rotary Engines", Automotive Engineering (SAE), Aug 1972, Vol 80, nº 8: 28–29. Reiner Nikulski: "The Norton rotor turns in my Hercules W-2000", "Sachs KC-27 engine with a catalyst converter", and other articles in: "Wankel News" (In German, from Hercules Wankel IG) "A WorldWide Rotary Update", Automotive Engineering (SAE), Feb 1978, Vol 86, nº 2: 31–42. B Lawton: 'The Turbocharged Diesel Wankel Engine', C68/78, of: 'Institution of Mechanical Engineers Conference Publications. 1978–2, Turbocharging and Turbochargers, , pp 151–160. T Kohno et al. (Toyota): "Rotary Engine's Light-Load Combustion Improved", Automotive Engineering (SAE), Aug 1979: 33–38. Also in SAE paper 790435. Kris Perkins: Norton Rotaries, 1991 Osprey Automotive, London. Karl Ludvigsen: Wankel Engines A to Z, New York 1973. Len Louthan (AAI corp.): 'Development of a Lightweight Heavy Fuel Rotary Engine', SAE paper 930682 Patents: , 1974 -Kawasaki; , 1974 -Ford; , 1974; , 1976. -Ford; , 1978; , 1979, -Ford. Dun-Zen Jeng et al.: 'The Numerical Investigation on the Performance of Rotary Engine with Leakage, Different Fuels and Recess Sizes', SAE paper 2013-32-9160, and same author: 'The intake and Exhaust Pipe Effect on Rotary Engine Performance', SAE paper 2013-32-9161 Wei Wu et al.: 'A Heat Pipe Assisted Air-Cooled Rotary Wankel Engine for Improved Durability, Power and Efficiency', SAE paper 2014-01-2160 Alberto Boretti: 'CAD/CFD/CAE Modelling of Wankel Engines for UAV', SAE Technical Paper 2015-01-2466 External links Piston ported engines Pistonless rotary engine Motorcycle engines German inventions 20th-century inventions