ENMASA Beta
# ENMASA Beta

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)

Data from Bridgman, 1953

### 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)

### Components

* 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

### Performance

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