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The Rolls-Royce Falcon is an aero engine developed in 1915. It was a smaller version of the Rolls-Royce Eagle, a liquid-cooled V-12 of 867 cu in (14.2 L) capacity. Fitted to many British World War I-era aircraft, production ceased in 1927. The Falcon was designed by R.W. Harvey-Bailey.[1]

Falcon
Preserved Rolls-Royce Falcon III at the Shuttleworth Collection
Type	V-12 aero engine
Manufacturer	Rolls-Royce Limited
First run	1915
Major applications	Bristol F.2 Fighter Blackburn Kangaroo
Number built	2,185
Developed from	Rolls-Royce Eagle

An airworthy Falcon survives today and powers a Bristol F.2 Fighter during summer displays.

Design and development

Production of the Falcon began in September 1916 and was so successful that it was also manufactured under licence by Brazil Straker in Bristol.[2] Production continued until 1927, by which time 2,185 had been built.[3]

An unusual feature of this engine was the epicyclic propeller reduction gear which contained a clutch designed to limit the maximum torque, thus protecting the reduction gears.[4]

The Falcon was notably used in the Bristol F.2 Fighter and Blackburn Kangaroo bomber.

Variants

Note:[5]

Falcon I (Rolls-Royce 190 hp Mk I)

(1916-17), 230 hp, 250 engines produced in both left- and right-hand tractor versions.

Falcon II (Rolls-Royce 190 hp Mk II)

(1917), 253 hp, carburettor size increased. 250 built at Derby.

Falcon III (Rolls-Royce 190 hp Mk III)

(1917-1927), 285 hp, increased compression ratio (5.3:1), twin carburettors replaced with four Rolls-Royce/Claudel-Hobson units. 1,685 built at Derby.

Applications

List from Guttery and Lumsden:[3][4]

Survivors

Bristol F.2B Fighter, D-8096, is based at the Shuttleworth Collection and is powered by a Falcon III, this aircraft flies regularly in summer.[6]

Engines on display

• A Rolls-Royce Falcon is on public display at the Shuttleworth Collection, Bedfordshire.
• A Rolls-Royce Falcon is displayed at the Rolls-Royce Heritage Trust Collection (Derby).

Specifications (Falcon III)

Data from Jane's[7] and Lumsden.[3]

General characteristics

• Type: 12-cylinder liquid-cooled 60 deg. Vee aircraft piston engine
• Bore: 4 in (101.6 mm)
• Stroke: 5.75 in (146 mm)
• Displacement: 866.5 in³ (14.2 L)
• Length: 68 in (1,727 mm)
• Width: 40.3 in (1,024 mm)
• Height: 37.2 in (945 mm)
• Dry weight: 715 lb (324 kg)

Components

• Valvetrain: Overhead camshaft, two valves per cylinder
• Fuel system: Four Rolls-Royce/Claudel-Hobson carburettors
• Fuel type: 40-50 octane petrol (pre-1923)
• Cooling system: Liquid-cooled

Performance

• Power output: 288 hp (215 kW) at 2,300 rpm at sea level
• Compression ratio: 5.3:1
• Fuel consumption: 18.5 Imp gal/hr (84 L/hr)
• Oil consumption: 0.75 Imp gal/hr (3.4 L/hr)
• Power-to-weight ratio: 0.4 hp/lb (0.66 kW/kg)

See also

• Rolls-Royce aircraft piston engines

Related development

• Rolls-Royce Eagle

Related lists

• List of aircraft engines

References

Notes

Bibliography

External links

• Photo of a Rolls-Royce Falcon at enginehistory.org

На других языках

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[de] Rolls-Royce Falcon

Der Rolls-Royce Falcon war ein flüssigkeitsgekühlter Zwölfzylinder-Flugmotor des britischen Herstellers Rolls-Royce. Es handelte sich um einen V-Motor mit 60°-Bankwinkel. Über ein Luftschraubengetriebe (Planetengetriebe) mit einer Untersetzung von 1:1,698 wurde der Propeller angetrieben. Mit einem Hubraum von 14,2 Litern war er eine kleinere Ausführung des Rolls-Royce Eagle (20,3 Liter). Der Falcon-Motor erwies sich als außerordentlich zuverlässig und wurde in eine Vielzahl von Flugzeugtypen und auch in einige Luftschiffe eingebaut.

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- [en] Rolls-Royce Falcon

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[it] Rolls-Royce Falcon

Il Rolls-Royce Falcon era un motore aeronautico sviluppato dalla britannica Rolls-Royce Limited nel 1915.

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[ru] Rolls-Royce Falcon

Роллс-Ройс Фолкон (англ. Falcon — сокол) — британский авиационный двигатель, разработанный в 1915 году. Представлял собой уменьшенную версию Eagle — 12-цилиндровый V-образный двигатель жидкостного охлаждения объёмом 14,2 л. Устанавливался на многие британские самолёты периода Первой мировой войны и выпускался до 1927 года. Конструктором двигателя был Р.В. Харви-Бейли[1]

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