The Walter Junior was a family of four cylinder air cooled inverted inline engines produced by Walter Aircraft Engines in Czechoslovakia in the 1930s for aircraft, characterised by a bore and stroke of 115 mm × 140 mm (4.53 in × 5.51 in), a displacement of 5,814 cm3 (354.8 cu in) and producing roughly 78 kW (105 hp).
| Junior | |
|---|---|
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| Type | Inline piston engine |
| National origin | Czechoslovakia |
| Manufacturer | Walter Aircraft Engines |
| First run | 1932 |
The Junior was also built in Poland as the P.Z. Inż. Junior.[1]
Variants
edit- Walter Junior 4-I
- 78 kW (105 hp) at 2,000 rpm.
- Walter Junior-Major
- 89 kW (120 hp) at 2,100 rpm (nominal), 97 kW (130 hp) at 2,350 rpm (maximum).
- P.Z. Inż. Junior
- Approximately 600 engines manufactured under license in Poland by Państwowe Zakłady Inżynierii, Warsaw.
- Elizalde J4
- Approximately 150 engines manufactured under license in Spain by Elizalde SA Barcelona.
Applications
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Specifications
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General characteristics
- Type: 4-cylinder inverted air-cooled inline
- Bore: 115 mm (4.5 in)
- Stroke: 140 mm (5.5 in)
- Displacement: 5.816 L (354.9 cu in)
- Length: 1,182 mm (46.5 in)
- Width: 526 mm (20.7 in)
- Height: 767 mm (30.2 in)
- Dry weight: 135 kg (298 lb) dry
Components
- Valvetrain: One intake and one exhaust valve per cylinder operated by pushrods and rockers
- Fuel system: Zenith or Claudel-Hobson carburettor
- Fuel type: 68 octane petrol
- Oil system: Pressure fed, dry sump
- Cooling system: Air-cooled
- Reduction gear: Direct drive, left hand tractor
Performance
- Power output: 78 kW (105 hp) at 2,000 rpm (nominal), 89 kW (120 hp) at 2,200 rpm (maximum)
- Compression ratio: 5.2:1
See also
editComparable engines
Related lists
References
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Wikimedia Commons has media related to Walter Junior 4.
- ^ Forbes, Peter; Forbes, Rita. "Engine Data Sheets:Czechoslovakian Aero Engines: Page 117 of 140". Peter & Rita Forbes' Engine Webpages. Retrieved 20 April 2018.