Isotta Fraschini Beta

The Isotta Fraschini Beta was an air cooled aircraft engine produced by the Italian engineering company Isotta Fraschini in the 1940s.

Beta
Type Air cooled V12 aircraft engine
National origin Italy
Manufacturer Isotta Fraschini

Design and development

The Isotta Fraschini derived the Beta inverted 6-cylinder in-line aircraft engine from the Gamma, with which it shared its bore and stroke. The engine had a one-piece aluminium alloy crankcase with steel and aluminium cylinders, each with a single inlet and a single exhaust valve. It had a carburettor designed by Isotta Fraschini and a single speed supercharger.[1] It was produced in small numbers and fitted to a number of Italian training aircraft, including the Nardi FN.316 used in limited quantities by the Regia Aeronautica, Aeronautica Nazionale Repubblicana and German Luftwaffe during World War II.[2]

Variants
Beta R.C.10 ISZ
300 hp (224 kW) for take-off 270 hp (201 kW) at 1,500 m (4,921 ft)

Applications

Specifications

Data from Wilkinson, 1945[1]

General characteristics

  • Type: 6-cylinder air cooled inverted in-line aircraft piston engine
  • Bore: 125 mm (4.9 in)
  • Stroke: 130 mm (5.1 in)
  • Displacement: 9.6 l (586 in3)
  • Length: 1,625 mm (64.0 in)
  • Width: 410 mm (16 in)
  • Height: 800 mm (31 in)
  • Dry weight: 225 kg (496 lb)

Components

Performance

  • Power output:
    • (Take-off) 300 hp (224 kW) at 2700 rpm
    • (Normal) 270 hp (201 kW) at 2500 rpm at 4,600 m (15,100 ft)
    • (Cruising) 210 hp (157 kW) at 2200 rpm at 4,600 m (15,100 ft)
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See also

Related development

Comparable engines

Related lists

References

Notes
  1. Wilkinson 1945, p. 297.
  2. Arena 1996, p. 325.
  3. Thompson 1963, p. 46.
  4. Thompson 1963, p. 13.
  5. Brotzu, Caso, Cosolo 1977, p. 68.
  6. Stocchetti 2009.

Bibliography
  • Arena, Nino (1996). L'Aeronautica Nazionale Repubblicana: la guerra aerea in Italia 1943-1945 (in Italian). Parma: Albertelli.
  • Brotzu, Emilio; Caso, Michele; Cosolo, Gherardo Cosolo (1977). Aerei Italiani nella 2ª Guerra Mondiale Vol.11, Scuola-Collegamento (in Italian). Roma: Edizioni Bizzarri. ISBN 978-8-8859-0949-6.
  • Stocchetti, Roberto (2009). "SAI Ambrosini 7, immagini, scheda e storia". Ali e Uomini (in Italian). Retrieved 8 September 2018.
  • Thompson, Jonathan (1963). Italian Civil and Military Aircraft, 1930-1945. Los Angeles: Aero Publishers. ISBN 1-2584-4296-5.
  • Wilkinson, Paul (1945). Aircraft Engines of the World. New York: P H Wilkinson.
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