The Rolls-Royce RB.39 Clyde was Rolls-Royce's first purpose-designed turboprop engine and the first turboprop engine to pass its civil and military type-tests.[2][3]
The Clyde used a two-shaft design, with an axial compressor based on that of the Metrovick F.2[4][5] for the low-pressure section, and a single-sided centrifugal compressor scaled up from the Merlin 46 supercharger[6] as the high-pressure stage, both mounted on the HP shaft and driven by a single stage HP turbine. A single stage power turbine drove the front mounted propeller reduction gearbox via the concentric LP shaft. A fairly novel feature of this compact gearbox was the power output to contra-rotating propellers.[7]
The Clyde was a long engine with the axial LP compressor in front of what was, in effect, a scaled-down Derwent engine. Accessories were grouped around the axial compressor which conveniently narrowed towards the rear. Cooling for turbines and turbine bearings came from a small impeller on the main shaft as well as air taken from the axial and centrifugal compressors. Testing of the development engines exceeded expectations with the engine soon being rated at 4,030 eshp.[5][1] During testing potentially destructive vibrations were found originating in the straight-cut spur gears in the reduction gearbox.[1]
The engine was selected as the main engine of the Westland Wyvern TF Mk.2 strike aircraft.[2] However, despite the promising performance of the test engines Ernest Hives felt that pure-jets such as the Avon were the future and the Clyde programme was terminated, forcing Westlands to use the less than satisfactory Armstrong Siddeley Python on the production Wyverns.[2] and so Rolls-Royce's first production turboprop would be the Dart.
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Notes
^ abcdKay, Anthony L. (2007). "14". Turbojet History and Development 1930-1960 vol.1 (1st ed.). Marlborough: The Crowood Press. pp. 105–118. ISBN978-1-86126-912-6.
^ abcdGunston, Bill (2006). World Encyclopedia of Aero Engines (5th ed.). Stroud: Sutton Publishing. pp. 194–195. ISBN0-7509-4479-X.
^ ab"World Encyclopedia of Aero Engines – 5th edition" by Bill Gunston, Sutton Publishing, 2006, P.195
^Feilden, G. B. R. (2005). "Lionel Haworth. 4 August 1912 — 12 April 2000". Biographical Memoirs of Fellows of the Royal Society. 51: 195–220. doi:10.1098/rsbm.2005.0013. S2CID 60786773.
^"Not much of an Engineer" by Sir Stanley Hooker, Airlife Publishing Ltd, 1984, P.227
Bibliography
Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN1-85260-163-9
Kay, Anthony L. (2007). "14". Turbojet History and Development 1930-1960 vol.1 (1st ed.). Marlborough: The Crowood Press. pp. 105–118. ISBN978-1-86126-912-6.
King, H. F. "The Two R's: A Commemorative History of Rolls-Royce Aero Engines. (article and images)." Flight No. 2363, Volume 65, 7 May 1954.
January 06, 2023
rolls, royce, clyde, rolls, royce, clyde, rolls, royce, first, purpose, designed, turboprop, engine, first, turboprop, engine, pass, civil, military, type, tests, clyde, display, rolls, royce, heritage, trust, derbytype, turbopropmanufacturer, rolls, royce, li. The Rolls Royce RB 39 Clyde was Rolls Royce s first purpose designed turboprop engine and the first turboprop engine to pass its civil and military type tests 2 3 RB 39 ClydeRolls Royce Clyde on display at the Rolls Royce Heritage Trust DerbyType TurbopropManufacturer Rolls Royce LimitedFirst run 5 August 1945 1 Number built 9 2 As with subsequent Rolls Royce gas turbines it was named after a river the River Clyde Contents 1 Design and development 2 Engines on display 3 Specifications Clyde 3 1 General characteristics 3 2 Components 3 3 Performance 4 See also 5 References 5 1 Notes 5 2 BibliographyDesign and development EditThe Clyde used a two shaft design with an axial compressor based on that of the Metrovick F 2 4 5 for the low pressure section and a single sided centrifugal compressor scaled up from the Merlin 46 supercharger 6 as the high pressure stage both mounted on the HP shaft and driven by a single stage HP turbine A single stage power turbine drove the front mounted propeller reduction gearbox via the concentric LP shaft A fairly novel feature of this compact gearbox was the power output to contra rotating propellers 7 The Clyde was a long engine with the axial LP compressor in front of what was in effect a scaled down Derwent engine Accessories were grouped around the axial compressor which conveniently narrowed towards the rear Cooling for turbines and turbine bearings came from a small impeller on the main shaft as well as air taken from the axial and centrifugal compressors Testing of the development engines exceeded expectations with the engine soon being rated at 4 030 eshp 5 1 During testing potentially destructive vibrations were found originating in the straight cut spur gears in the reduction gearbox 1 The engine was selected as the main engine of the Westland Wyvern TF Mk 2 strike aircraft 2 However despite the promising performance of the test engines Ernest Hives felt that pure jets such as the Avon were the future and the Clyde programme was terminated forcing Westlands to use the less than satisfactory Armstrong Siddeley Python on the production Wyverns 2 and so Rolls Royce s first production turboprop would be the Dart Engines on display EditA part sectioned example is on display at the Rolls Royce Heritage Trust Derby Specifications Clyde Edit Side view with sectioned combustion chamber Data from Turbojet History and Development 1930 1960 vol 1 1 General characteristics Type Two Shaft Turboprop Length 121 2 in 3 080 mm Diameter 46 8 in 1 190 mm Dry weight 2 800 lb 1 300 kg dry Components Compressor LP 9 stage axial HP Single centrifugal stage Combustors Eleven can type combustion chambers Turbine HP single stage axial Power single stage axial Fuel type Kerosene jet fuel grade e Oil system Pressure spray scavenge systemPerformance Maximum power output 4 030 eshp 3 006 kW Overall pressure ratio 6 1 Air mass flow 41 5 lb 18 8 kg s Specific fuel consumption 0 71 lb hp hr 0 432 kg kW hr Power to weight ratio 1 439 eshp lb 2 09 kW kg See also EditRelated lists List of aircraft enginesReferences Edit Wikimedia Commons has media related to Rolls Royce Clyde Notes Edit a b c d Kay Anthony L 2007 14 Turbojet History and Development 1930 1960 vol 1 1st ed Marlborough The Crowood Press pp 105 118 ISBN 978 1 86126 912 6 a b c d Gunston Bill 2006 World Encyclopedia of Aero Engines 5th ed Stroud Sutton Publishing pp 194 195 ISBN 0 7509 4479 X Flight 1954 p 582 McKenzie A 2001 Axial Compressor Development at Rolls Royce Derby 1946 1962 Rolls Royce Heritage Trust pp 10 23 ISBN 978 1 872922 42 3 Technical Series Nº11 a b World Encyclopedia of Aero Engines 5th edition by Bill Gunston Sutton Publishing 2006 P 195 Feilden G B R 2005 Lionel Haworth 4 August 1912 12 April 2000 Biographical Memoirs of Fellows of the Royal Society 51 195 220 doi 10 1098 rsbm 2005 0013 S2CID 60786773 Not much of an Engineer by Sir Stanley Hooker Airlife Publishing Ltd 1984 P 227 Bibliography Edit Gunston Bill World Encyclopedia of Aero Engines Cambridge England Patrick Stephens Limited 1989 ISBN 1 85260 163 9 Kay Anthony L 2007 14 Turbojet History and Development 1930 1960 vol 1 1st ed Marlborough The Crowood Press pp 105 118 ISBN 978 1 86126 912 6 King H F The Two R s A Commemorative History of Rolls Royce Aero Engines article and images Flight No 2363 Volume 65 7 May 1954 Retrieved from https en wikipedia org w index php title Rolls Royce Clyde amp oldid 1104944037, wikipedia, wiki, book, books, library,
