Rolls-Royce Falcon







































Falcon

RollsRoyceFalconIII.JPG
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

Unit cost
 £1,210 (1918)

Developed from
Rolls-Royce Eagle

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]


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




Contents






  • 1 Design and development


  • 2 Variants


  • 3 Applications


  • 4 Survivors


  • 5 Engines on display


  • 6 Specifications (Falcon III)


    • 6.1 General characteristics


    • 6.2 Components


    • 6.3 Performance




  • 7 See also


  • 8 References


    • 8.1 Notes


    • 8.2 Bibliography




  • 9 External links





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]




  • Armstrong Whitworth F.K.12

  • Avro 523C Pike

  • Avro 529

  • Blackburn G.P. Seaplane

  • Blackburn Kangaroo

  • Blackburn Sprat

  • Bristol Type 12 F.2A

  • Bristol Type 27 F.2B Coupe

  • Bristol F.2 Fighter

  • Bristol Type 86 Greek Tourer

  • Bristol Type 96

  • Curtiss H-12

  • de Havilland DH.37

  • Fairey F.2

  • Fairey N.9

  • Martinsyde F.3

  • Martinsyde R.G

  • Martinsyde Buzzard

  • Parnall Perch

  • Royal Aircraft Factory F.E.2

  • Royal Aircraft Factory R.E.7

  • Vickers F.B.14

  • Vickers Viking

  • Vickers Vendace

  • Vickers Vedette

  • Westland Limousine

  • Westland Wizard




Survivors


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



Engines on display


  • A Rolls-Royce Falcon is on public display at the Shuttleworth Collection, Bedfordshire.


Specifications (Falcon III)



Rolls-Royce Falcon.jpg


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





  1. ^ "World Encyclopedia of Aero Engines - 5th edition" by Bill Gunston, Sutton Publishing, 2006, p.185


  2. ^ Pugh 2001, p.82.


  3. ^ abc Lumsden 2003, p.188.


  4. ^ ab Guttery 1969, p.27.


  5. ^ Alternate designations in italics.


  6. ^ Shuttleworth Collection - Bristol Fighter www.shuttleworth.org. Retrieved: 13 December 2017


  7. ^ Jane's 1989, p.312.




Bibliography


.mw-parser-output .refbegin{font-size:90%;margin-bottom:0.5em}.mw-parser-output .refbegin-hanging-indents>ul{list-style-type:none;margin-left:0}.mw-parser-output .refbegin-hanging-indents>ul>li,.mw-parser-output .refbegin-hanging-indents>dl>dd{margin-left:0;padding-left:3.2em;text-indent:-3.2em;list-style:none}.mw-parser-output .refbegin-100{font-size:100%}


  • Guttery, T.E. The Shuttleworth Collection. London: Wm. Carling & Co, 1969. .mw-parser-output cite.citation{font-style:inherit}.mw-parser-output .citation q{quotes:"""""""'""'"}.mw-parser-output .citation .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/12px-Wikisource-logo.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-maint{display:none;color:#33aa33;margin-left:0.3em}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
    ISBN 0-901319-01-5


  • Jane's Fighting Aircraft of World War I. London. Studio Editions Ltd, 1993.
    ISBN 1-85170-347-0

  • Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003.
    ISBN 1-85310-294-6.

  • Pugh, Peter. The Magic of a Name - The Rolls-Royce Story: The First 40 Years. Duxford, Cambridge: Icon Books, 2001.
    ISBN 1-84046-151-9.




External links






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








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