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The Phoenix was an experimental version of the Bristol Aeroplane Company's Pegasus engine, adapted to run on the Diesel cycle. Only a few were built between 1928 and 1932, although samples fitted to a Westland Wapiti held the altitude record for diesel-powered aircraft at 27,453 ft (8,368 m) from 11 May 1934 until World War II.[1] The primary advantage of the Phoenix was better fuel efficiency at cruise, by up to 35%.

Phoenix
Type	Diesel aircraft engine
Manufacturer	Bristol Aeroplane Company
First run	1928
Major applications	Westland Wapiti

Variants

• Phoenix I: Diesel version of the Pegasus IF, 380 hp.
• Phoenix IIM: Medium-supercharged diesel version of Pegasus IM, 470 hp.

Applications

• Westland Wapiti

Specifications (Phoenix I)

Data from Lumsden[2]

General characteristics

• Type: nine-cylinder air-cooled Diesel radial engine
• Bore: 5.75 in (146 mm)
• Stroke: 7.5 in (190 mm)
• Displacement: 1,753 in³ (28.7 L)
• Length: 43.75 in (1,111 mm)
• Diameter: 55.25 in (1,403 mm)
• Dry weight: 1,067 lb (484 kg)

Components

• Valvetrain: Overhead valve, two intake and two exhaust valves per cylinder, pushrod-actuated.
• Fuel type: Diesel
• Cooling system: Air-cooled

Performance

• Power output: 380 hp (283 kW) at 2,000 rpm at sea level
• Specific power: 0.22 hp/in³ (9.9 kW/L)
• Compression ratio: 14:1
• Power-to-weight ratio: 0.36 hp/lb (0.6 kW/kg)

See also

Comparable engines

• BMW 114-V4
• Packard DR-980

Related lists

• List of aircraft engines

References

Notes

Bibliography

External links

• Bristol Phoenix and Westland Wapiti - Flight, May 1934

На других языках

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[de] Bristol Phoenix

Der Bristol Phoenix war ein luftgekühlter Neunzylinder-Sternmotor des britischen Herstellers Bristol Aeroplane Company. Er wurde zu Versuchszwecken gebaut, um die Verwendbarkeit des Dieselverfahrens auch für Flugmotoren zu untersuchen.

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- [en] Bristol Phoenix

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[es] Bristol Phoenix

El Phoenix fue una versión experimental del motor Pegasus de la Bristol Aeroplane Company, adaptado para funcionar con el ciclo diésel. Se cosntruyeron sólo unos pocos ejemplares entre 1928 y 1932, aunque los ejemplares colocados en el Westland Wapiti tuvieron el récord de altura para aviones con motores diésel de 8.368 m, obtenido el 11 de mayo de 1934 hasta la Segunda Guerra Mundial.[1] La pricnipal ventaja del Phoenix era una mayor eficiencia del combustible en crucero, por arriba del 35%.

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[fr] Bristol Phoenix

Le Phoenix était une version expérimentale du moteur Pegasus de la Bristol Aeroplane Company, adapté pour fonctionner sur le cycle de Diesel. Seuls quelques-uns ont été construits entre 1928 et 1932, bien que les échantillons montés sur un Westland Wapiti aient détenu le record d'altitude pour les avions à moteur diesel à 27 453 pieds (8 368 m) du 11 mai 1934 jusqu'à Seconde Guerre mondiale[1]. Le principal avantage du Phénix était un meilleur rendement à vitesse de croisière, jusqu'à 35%.

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[it] Bristol Phoenix

Il Bristol Phoenix era un motore radiale 9 cilindri raffreddato ad aria a ciclo Diesel sviluppato dall'azienda britannica Bristol Engine Company nei tardi anni venti e rimasto allo stadio di prototipo.

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