Walter Minor
{{Short description|1920s Czech piston aircraft engine}}
| {{Infobox Aircraft Begin
|name= Minor |image = Walter Minor 6-III.JPG |caption = Preserved Walter Minor 6-III }} {{Infobox Aircraft Engine |type= Inline piston engine |national origin = Czechoslovakia |manufacturer= Walter Aircraft Engines |first run=1929 |major applications= |number built = |program cost = |unit cost = |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 {{convert|105|mm|in|abbr=on}} and {{convert|115|mm|in|abbr=on}}, respectively. Typical power ratings varied from {{cvt|105|to|160|hp|kW}}.Gunston 1989, p.174.
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
{{columns-list|colwidth=30em|
- 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)
Data from: Oldengine.org [http://www.oldengine.org/members/diesel/Duxford/czechaer1.htm Oldengine.org]
{{pistonspecs
|
|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
}}
See also
{{aircontent
|see also=
|related=
|similar aircraft=
|lists=
|similar engines=
}}
References
{{reflist}}
- {{cite web|url=http://www.enginehistory.org/Museums/national_technical_museum.shtml|title=National Technical Museum, Prague|access-date=8 July 2013}}
- Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. {{ISBN|1-85260-163-9}}
- [http://www.oldengine.org/members/diesel/Duxford/czechaer1.htm Oldengine.org]
External links
{{commons category}}
{{Walter aeroengines}}
Category:Aircraft air-cooled inline piston engines
Category:1920s aircraft piston engines