Hirth

Hellmuth Hirth and Hirth Motoren The company was founded by Hellmuth Hirth as Versuchsbau Hellmuth Hirth. The first commercial engine, the 4-cylinder inverted in-line HM 60, first ran in June 1923 and was sold from the next year. Its quality was extremely high and it formed the foundation of the business. The company was renamed Leichtmetall-Werke GmbH, Elektronmetall GmbH and eventually separated from the aero engine manufacturing to form Mahle GmbH as a manufacturer of light alloy engine components, specifically the magnesium alloy Elektron, including parts for aircraft engines. In 1931, Hirth renamed the much-expanded aero engine business as Hirth Motoren GmbH. In 2011 Gobler-Hirth were developing UAV piston engines to run on heavier jet fuel, because of its higher energy density and ease of handling. In 2018 Gobler-Hirth was taken over by UMS Skeldar, a joint venture between the Swedish aerospace company Saab AB and Swiss drone maker UMS Aero Group in which UMS hold a majority share. The company was renamed Hirth Engines Gmbh. The Skeldar range of UAVs, originally developed by Saab, have introduced Hirth's heavy-fuel piston engines to the marketplace, alongside their established gasoline-fuelled products. ==Engines==

Four-stroke piston (prewar and WWII) • Hirth HM 60 - 4-cylinder inverted air-cooled inline aircraft engine, • Hirth HM 500 - 4-cylinder air-cooled inverted inline, • Hirth HM 501 - 4-cylinder air-cooled inverted inline, • Hirth HM 504 - 4-cylinder air-cooled inverted inline, • Hirth HM 506 - 6-cylinder air-cooled inverted inline, • Hirth HM 508 - 8-cylinder air-cooled inverted-V, • Hirth HM 512 - 12-cylinder air-cooled inverted-V, • Hirth HM 515 - 4-cylinder air-cooled inverted inline, Turbine (prewar and WWII) • Heinkel HeS 1 - Bench-test prototype engine fuelled by hydrogen, run some five months after the first Whittle bench-test prototype. • Heinkel HeS 3 - First jet engine to fly. • Heinkel-Hirth HeS 30 - aka 006. • Heinkel-Hirth HeS 40 - "constant volume" combustion engine. • Heinkel-Hirth HeS 50 - ducted-fan unit for long-duration flight. • Heinkel-Hirth HeS 60 - HeS 50 with an additional turbine stage. • Heinkel-Hirth HeS 011 - advanced twin-spool design, 19 test examples built. Two-stroke piston (postwar) • Hirth F-23 - 2-cylinder two stroke • Hirth F-30 - 4-cylinder two stroke • Hirth F-33 - 1-cylinder two stroke • Hirth F-36 - 1-cylinder two stroke • Hirth F-40 - 4-cylinder two stroke • Hirth F-102 - 2-cylinder two stroke • Hirth F-263 - 2-cylinder two stroke • Hirth 2702 - 2-cylinder two stroke • Hirth 2703 - 2-cylinder two stroke • Hirth 2704 - 2-cylinder two stroke • Hirth 2706 - 2-cylinder two stroke • Hirth 3002 - 4-cylinder two stroke • Hirth 3202 - 2-cylinder two stroke • Hirth 3203 - 2-cylinder two stroke • Hirth 3502 - 2-cylinder two stroke • Hirth 3503 - 2-cylinder two stroke • Hirth 3701 - 3-cylinder two stroke ==See also==