The Viale 35 hp was a five-cylinder, air-cooled, radial engine for aircraft use designed and built in France by the Italian engine designer Spirito Mario Viale, that was first run around 1910. It developed 35 horsepower (26 kW). Three- and seven-cylinder variants of the same engine were built, although little is known about them.[1]

35 hp
Preserved Viale 35 hp at the London Science Museum
Type	Radial aero engine
National origin	France
Manufacturer	Spirito Mario Viale
First run	c.1910
Major applications	Avro Type F

Applications

• Bristol Babe
• Avro Type D
• Avro Type F

Engines on display

A preserved Viale 35 hp engine is on display at the Science museum in London. This engine is believed to be the unit that powered the sole example of the Avro Type F and was later used in the prototype Bristol Babe designed by Frank Barnwell.

Specifications (Viale 35 hp)

General characteristics

• Type: 5-cylinder single-row radial
• Designer: Spirito Mario Viale

Components

• Valvetrain: Single overhead exhaust valve, twin sidevalve inlet valves.
• Fuel system: Zenith carburettor
• Fuel type: 40-50 octane petrol
• Cooling system: Air-cooled
• Reduction gear: Direct drive, right-hand tractor

Performance

• Power output: 35 hp (26 kW)

See also

Comparable engines

• Armstrong Siddeley Genet

Related lists

• List of aircraft engines

References

Notes

Bibliography

External links

Wikimedia Commons has media related to Viale 35 hp.

• Flight, October 1912 - Image of the Viale 35 hp installed in the Avro Type F monoplane

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