Walter Minor
1920s Czech piston aircraft engine
title: "Walter Minor" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["aircraft-air-cooled-inline-piston-engines", "1920s-aircraft-piston-engines", "inverted-aircraft-piston-engines", "walter-aircraft-engines"] description: "1920s Czech piston aircraft engine" topic_path: "general/aircraft-air-cooled-inline-piston-engines" source: "https://en.wikipedia.org/wiki/Walter_Minor" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary 1920s Czech piston aircraft engine ::
::data[format=table title="infobox aero engine"]
| Field | Value |
|---|---|
| name | Minor |
| image | Walter Minor 6-III.JPG |
| caption | Preserved Walter Minor 6-III |
| engine_type | Inline piston engine |
| national_origin | Czechoslovakia |
| manufacturer | Walter Aircraft Engines |
| first_run | 1929 |
| :: |
|name= Minor |image = Walter Minor 6-III.JPG |caption = Preserved Walter Minor 6-III |engine_type= Inline piston engine |national_origin = Czechoslovakia |manufacturer= Walter Aircraft Engines |first_run=1929 |major_applications= |number_built = |developed_from = |developed_into = |variants_with_their_own_articles =
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 105 mm and 115 mm, respectively. Typical power ratings varied from 105 to.
After Walter concentrated on the turbine powerplants only, the production of piston engines has been transferred to the 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
- Aero Ae 45
- Aero Ae 50
- Aviator Shershen'
- Beneš-Mráz Beta-Minor
- Fry Esprit VFII
- IAR 814
- Ikarus Aero 2
- Ikarus Kurir
- LAZ-7
- Let L-200 Morava
- LIBIS KB-6
- LWD Zuch
- Manzolini Libellula II
- Nord NC.856
- Nord NC.859
- Nord NC-860
- OFW OK-15
- Orličan L-40 Meta Sokol
- Pasotti Airone
- Praga E-210
- Praga E-211
- RG-7 Șoim
- RG-7 Șoim III
- Starck AS-57
- Zlin 22
- Zlin Trener
Specifications (Minor 4-cylinder)
::figure[src="https://upload.wikimedia.org/wikipedia/commons/9/94/Walter_Minor_cutaway.jpg" caption="Walter Minor 4-III"] ::
Data from: Oldengine.org | and start a new, fully formatted line with -- |type=4-cylinder inverted inline air-cooled |bore=105 mm (4.14 in) |stroke=115 mm (4.53 in) |displacement=4 L (244 cu in) |length=1,119 mm (44.09 in) |diameter= |width=440 mm (17.32 in) |height=630 mm (24.80 in) |weight=93 kg (205 lb) |valvetrain= 1 inlet and 1 exhaust valve per cylinder |supercharger= |turbocharger= |fuelsystem=1 Claudel carburetor |fueltype=68 octane |oilsystem= |coolingsystem=Air-cooled |power=95 hp (71 kW) at 2,550 rpm |specpower= |compression=5.3:1 |fuelcon= |specfuelcon= |oilcon= |power/weight=0.76 kW/kg (0.46 hp/lb) at cruise power
References
- Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989.
- Oldengine.org
References
- Gunston 1989, p.174.
- "Oldengine.org".
::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::