Walter Mikron Explained
The Walter Mikron is a four-cylinder, air-cooled, inverted straight engine for aircraft.
Development
Developed in Czechoslovakia in the early 1930s, the engine saw limited use in late 1930s and early 1950s. In the 1980s an initial batch of engines was rebuilt by Aerotechnik Moravska Trebova for use on L-13 Vivat motorgliders. Production of new engines followed. The company Aerotechnik was later bought by Parma Technik and production resumed in 1999, under a new name, in the same factory. The engine is mostly used on ultralight, LSA and experimental aircraft.[1] The production is about 20-30 engines annually. (2014)
Variants
- Mikron IInitial production engines 50abbr=onNaNabbr=on.16 engines made in 1935.
- Mikron IIThe Mikron II, released in 1936, had a bore of 88abbr=onNaNabbr=on and displacement of 2.336abbr=onNaNabbr=on, delivering 60abbr=onNaNabbr=on at 2,600 rpm max continuous and 62abbr=onNaNabbr=on at 2,800 rpm for short periods.[2] After a hiatus in production during the Second World War, production resumed till 1948, when the Micron III went into production. In total 421 Mikron II engines were produced.
- Mikron IIIWith a displacement of 2.44abbr=onNaNabbr=on, compression ratio 6:1, it produces 48.5kW at 2,600 rpm.[3] Introduced in 1945, 103 engines made between 1948-1950. The engines were used on Praga E-114 Air Baby.
- Mikron IIISIn 1980s company Aerotechnik in Moravska Trebova had collected 56(!) engines of the post war production.The engines have been rebuilt, new pistons and carburetor JIKOV SOP 40L installed.Used on L-13 Vivat motorgliders.
- Mikron IIIAEngines produced by Aerotechnik in 1980s-90s. Updated cylinder head with one more cooling rib, updated connecting rod lower end, otherwise identical with IIIS.
- Mikron IIIBImproved version of the Mikron IIIA 75abbr=onNaNabbr=on at 2,750rpm for 5 minutes, max continuous power of 69abbr=onNaNabbr=on from 2.44abbr=onNaNabbr=on, compression ratio 7.2:1, bore 90abbr=onNaNabbr=on, stroke 96abbr=onNaNabbr=on, dry weight 69abbr=onNaNabbr=onAlmost identical with IIIA except the compression ratio. The engine initially used lowered A heads. After some problems with cracking, new B heads were developed by Parma Technik.
- Mikron M IIISE, AE, BEEngines equipped with electric starter and alternator.
- Mikron IIIC80abbr=onNaNabbr=on at 2,800rpm from 2.7abbr=onNaNabbr=on, bore 93.3abbr=onNaNabbr=on, stroke 96abbr=onNaNabbr=on.Version developed by Parma Technik for ULL and experimental aeroplanes.
References
- Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989.
External links
Notes and References
- Web site: Parma Technik. 6 August 2011.
- Book: Grey, C.G. . Jane's All the World's Aircraft 1938 . 1938 . Sampson Low, Marston & company, ltd . London . Bridgman, Leonard .
- Gunston 1989, p.174.
