Fiat A.70
The Fiat A.70 was an air cooled radial engine with seven cylinders developed by the Italian engineering company Fiat Aviazione in the 1930s. The engine powered a number of Italian light competition and prototype aircraft.
| A.70 | |
|---|---|
 | |
| Fiat A.70 | |
| Type | Air cooled 7-cylinder radial aircraft engine |
| National origin | Italy |
| Manufacturer | Fiat Aviazione |
| Designed by | Tranquillo Zerbi |
| First run | 1934 |
Design and development
The A.70 was developed by Fiat Aviazione, part of Fiat S.p.A., as one of a number of related small radial engines.[1] It debuted at the Challenge International de Tourisme 1934, powering a number of the competitors.[2] The engine had seven cylinders of square design, with a bore and stroke of 115 mm (4.5 in), arranged around a crankshaft in a single row.[3] It was connected to the propeller by direct drive, often through a NACA cowling.[4]
Specifications (A.70S)
Data from NACA Technical Memorandum No.760.[3]
General characteristics
- Type: 7-cylinder, single row, air cooled radial engine
- Bore: 115 mm (4.5 in)
- Stroke: 115 mm (4.5 in)
- Displacement: 9.35 l (571 in3)
- Dry weight: 168 kg (370 lb)
Components
- Valvetrain: Two valves per cylinder
- Fuel type: Gasoline
- Cooling system: Air-cooled
- Reduction gear: Direct drive
Performance
- Power output: 200 hp (149 kW) at 2,300 rpm (max); 180 hp (134 kW) at 2,100 rpm (rated)
- Compression ratio: 5.8:1
- Power-to-weight ratio: 0.81 kg (1.8 lb) per hp
See also
Comparable engines
Related lists
References
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Wikimedia Commons has media related to Fiat A.70. |
Citations
- Bridgman 1950, p. 520.
- Schulz & Pleines 1934, p. 9.
- Schulz & Pleines 1934, p. 11.
- Thompson 1963, p. 99.
- Thompson 1963, p. 28.
- Thompson 1963, p. 162.
- Thompson 1963, p. 214.
Bibliography
- Bridgman, Leonard (1950). Jane's All the World's Aircraft 1950-1951. London: Sampson Low, Marston.
- Gunston, Bill (2006). World Encyclopedia of Aero Engines. Stroud: Sutton Publishing. ISBN 0-7509-4479-X.
- Schulz, R.; Pleines, W. (1934). NACA Technical Memorandum No.760: Technical Aspects of the 1934 International Touring Competition (Rundflug). Retrieved 17 November 2019.
- Thompson, Jonathan (1963). Italian Civil and Military Aircraft, 1930-1945. Los Angeles: Aero Publishers. ISBN 1-2584-4296-5.
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