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Type Air-cooled radial
National origin Spain
Manufacturer Empresia Nacional De Motores De Aviación S.A.

The ENMASA Beta was a Spanish air-cooled radial engine of the 1950s. A copy of the American Wright R-1820 Cyclone, the Beta was the powerplant of a number of post Spanish Civil War aircraft, including the Spanish version of the Junkers Ju 52 transport, the CASA C-202 Halcón and the Hispano HA-100 trainer.

Specifications (Beta B-4)[edit]

Data from [1]

General characteristics

  • Type: Nine-cylinder single-row air-cooled radial engine
  • Bore: 155.5 mm (6.1 in)
  • Stroke: 174.6 mm (6.8 in)
  • Displacement: 29.85 L (1,820 in³)
  • Length: 1,170 mm (46 in)
  • Diameter: 1,365 mm (53.7 in)
  • Dry weight: 468 kg (1,030 lb)


  • Valvetrain: One inlet valve and one sodium cooled exhaust valve per cylinder
  • Supercharger: Centrifugal type
  • Fuel system: One 4-barrel down-draught carburettor
  • Fuel type: 87 octane minimum
  • Cooling system: Air-cooled


  • Power output: 578 kW (775 hp) at 2,200 rpm (take-off power)

See also[edit]

Related development
Related lists


  1. ^ Bridgman 1953, p.335.
  • Bridgman, Leonard. Jane's All The World's Aircraft 1953-54. London:Jane's, 1953.