The Walter Minor is a family of four- and six-cylinder inverted inline air-cooled engines, developed under auspices of ing. Šimůnek and used on light aircraft. First produced in 1929, the Minor engines' family has an advanced design for the period and sports steel cylinders, aluminum heads and overhead valves, with identical bore and stroke of and , respectively. Typical power ratings varied from .
After Walter concentrated on the turbine powerplants only, the production of piston engines has been transferred to the
Avia
Avia Motors s.r.o. is a Czech automotive manufacturer. It was founded in 1919 as an aircraft maker, and diversified into trucks after 1945. As an aircraft maker it was notable for producing biplane fighter aircraft, especially the B-534. Avia ...
company that further developed the family, bringing fuel injection, as the Avia M-137 and M-337. Nowadays the smallest of the family, the four-cylinder carburetted Minor, is produced by a small company in the Czech Republic, while the M337 was available from the LOM Prague.
Variants
4 Cylinder
;Minor 4-I:
;Minor 4-II:
;Minor 4-III:
;Minor 4-IIIS: A 4-III fitted with a crankshaft driven supercharger.
;Minor M 332 (4 cyl.)
6 Cylinder
;Minor 6-I:
;Minor 6-II:
;Minor 6-III:
;Minor 6-IIIS: A 6-III fitted with a crankshaft driven supercharger.
;Minor M 337 (6 cyl.)
Others
;Minor Sc.:
Applications
Specifications (Minor 4-cylinder)
![Walter Minor cutaway](https://upload.wikimedia.org/wikipedia/commons/9/94/Walter_Minor_cutaway.jpg)
''Data from:'' Oldengine.org
Oldengine.org
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See also
References
*
* Gunston, Bill. ''World Encyclopedia of Aero Engines''. Cambridge, England. Patrick Stephens Limited, 1989.
External links
{{Walter aeroengines
Aircraft air-cooled inline piston engines
1920s aircraft piston engines
Inverted aircraft piston engines
Minor
Minor may refer to:
* Minor (law), a person under the age of certain legal activities.
** A person who has not reached the age of majority
* Academic minor, a secondary field of study in undergraduate education
Music theory
*Minor chord
** Barb ...