Walter Minor
Minor | |
---|---|
Preserved Walter Minor 6-III | |
Type | Inline piston engine |
National origin | Czechoslovakia |
Manufacturer | Walter Aircraft Engines |
First run | Template:Avyear |
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 (4.1 in) and 115 mm (4.5 in), respectively. Typical power ratings varied from 105 hp to 160 hp.[1] 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
- Minor Sc.
- Minor M 337
- Minor 4-I
- Minor 4-II
- Minor 4-III
- Minor 6-I
- Minor 6-II
- Minor 6-III
- Minor 12 1-MR
- [2]
Applications
LAZ-7
Specifications (Minor 4-cylinder)
Data from: Oldengine.org [3]
General characteristics
- Type: 4-cylinder inverted inline air-cooled
- Bore: 105mm (4.14 in)
- Stroke: 115mm (4.53 in)
- Displacement: 4 Liter (244 cu in)
- Length: 1,119mm (44.09 in)
- Width: 440mm (17.32 in)
- Height: 630mm (24.80 in)
- Dry weight: 93kg (205 lb)
Components
- Valvetrain: 1 inlet and 1 exhaust valve per cylinder
- Fuel system: 1 claudel carburetor
- Fuel type: 68 octane
- Cooling system: air-cooled
Performance
- Power output: 95 hp at 2,550 rpm
- Compression ratio: 5.3:1
- Power-to-weight ratio: 2.41lb/hp at cruise power
See also
Comparable engines
Related lists
References
- ^ Gunston 1989, p.174.
- ^ "National Technical Museum, Prague". Retrieved 8 July 2013.
- ^ Oldengine.org
- "National Technical Museum, Prague". Retrieved 8 July 2013.
- Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9
- Oldengine.org