Franklin O-225
The Franklin O-225 (company designation 4A/4A4) was an American air-cooled aircraft engine that first ran in the mid-1940s. The engine was of four-cylinder, horizontally-opposed layout and displaced 225 cu in (4 L). The power output was between 75 hp (56 kW) and 125 hp (93 kW) depending on the version.
| O-225/4A/4A4 | |
|---|---|
| Type | Piston aircraft engine |
| National origin | United States |
| Manufacturer | Franklin Engine Company |
| First run | 1945 |
Variants
- 4A4-75
- 75 hp (56 kW) at 1,950 rpm
- 4A4-85
- 85 hp (63 kW) at 2,200 rpm
- 4A4-100
- 100 hp (75 kW) at 2,550 rpm
- 4A-225
- 100 hp (75 kW) at 2,800 rpm
Applications
- Cessna 160
- Bendix 51
- Bendix 52
- Bendix 55
- Dansaire Coupe
- Eshelman Winglet
- Government Workshops Triciclo-Experimental
Specifications (4A4-100)
Data from
General characteristics
- Type: 4-cylinder air-cooled horizontally opposed aircraft piston engine
- Bore: 4.5 in (114.3 mm)
- Stroke: 3.5 in (88.9 mm)
- Displacement: 222.7 in³ (3.65 L)
- Dry weight: 198 lb (90 kg)
Components
- Cooling system: Air-cooled
Performance
- Power output: 100 hp (75 kW) at 2,550 rpm
References
- Notes
- Bibliography
- Gunston, Bill. (1986) World Encyclopedia of Aero Engines. Patrick Stephens: Wellingborough. p. 57
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