240 Landmarks Top ＞ Gasoline and Natural Gas Engine ＞ Rotary engine 10A type 　Rotary engine 10A type ・ This was an innovative engine that came into practical use through technical cooperation with the German company NSU Wankel. It was the world's first 2-rotor type rotary engine. ・The issue of chatter marks generated in the peripheral housing was solved by using carbon apex seals. Storage location : MAZDA MOTOR CORPORATION (3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima 730-8670) Year manufactured : 1967 Manufacturer : Toyo Kogyo Co., Ltd. Classification : Mass-production product Current status : On display (static): open to the public Model / Manufacture Model : 10A Type : Gasoline Company name : Mazda Motor Corporation Location : Mazda Motor Corporation Installation model : Mazda Cosmo Sports Year of manufacture : 1967 Designed by : Kenichi Yamamoto Specification Cylinder arrangement, number of cylinders : Inline 2-rotor Cycle / cooling method : 4/forced circulation Combustion chamber : Bathtub Total displacement : 491x2 cc Compression ratio : 9.4 Mass (weight) : 102 kg Dimensions : 51×59.5×54.5cm Ignition system : Battery coil type Radiator type : Pressure water tube type Performance Max. output : 110 ps/7000 rpm Max. torque : 13.3 kg-m/3500 rpm Rate of fuel consumption : 235 gr/ps-h Device Intake system : Side port Exhaust system : Peripheral port Points of interest, topicality : The world's first 2-rotor rotary engine for automobiles Features : Low vibration due to less reciprocating motion. Light and compact structure without valve train. Flat torque characteristics due to combustion on every rotation of the output shaft. Reference materials : (1) "Rotary Engine", Kenichi Yamamoto ed. (2) "COSMO SPORT No Shoukai", 1967, Toyo Kogyo Co., Ltd. 240 Landmarks Top ＞ Gasoline and Natural Gas Engine ＞ Rotary engine 10A type