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Rolls-Royce Tyne




The Rolls-Royce RB.109 Tyne is a twin-shaft turboprop engine first run in April 1955. It was first test flown during 1956 in the nose of a modified Avro Lincoln. Following company naming convention for gas turbine engines this turboprop design was named after the River Tyne.

The Tyne was developed primarily for the four-engined Vickers Vanguard airliner, the prototype first flying on 20 January 1959 equipped with four Tyne Mk.506 of 4,985 e.s.h.p. Production deliveries of the engine were made from mid-1959 onwards to power the 43 Vanguards delivered to British European Airways and Trans-Canada Airlines.

The engine was further developed with greater power and used in the later twin-engined Dassault-Breguet Atlantique long-range reconnaissance aircraft; also in the Canadair CL-44 and Transport Allianz Transall transport aircraft.

A single stage HP turbine drives the 9-stage HP compressor. A 3 stage LP turbine drives the 6-stage LP compressor and, through a reduction gearbox, the propeller. The combustor is cannular.

The Mark 515 Tyne had a nominal takeoff power output of 5,730 hp (4,273 kW) equivalent power, flat rated to ISA+16.8C.


Rolls-Royce Tyne testbed Avro Lincoln demonstrating at Farnborough 1956 on

just the nose Tyne, the 4 Merlins being shut down


4,370 hp (3,259 kW) fitted to Vickers Type 951 Vanguard and Vickers Merchantman.
5,064 hp (3,776 kW) for Vickers Type 952 Vanguard
4,616 hp (3,442 kW) for Canadair CL-44
5,399 hp (4,026 kW) for Short Belfast.
RTy.20 Mk 21
5,667 hp (4,226 kW) for Breguet 1150 Atlantic and Breguet ATL2 Atlantique
RTy.20 Mk 22
5,670 hp (4,228 kW) for Transall C-160
4,860 hp (3,624 kW) for Aeritalia G.222T
6,035 hp (4,500 kW) for Transall C-160 and Breguet ATL2 Atlantique
projected military use engine rated at 7,075 hp (5,276 kW) equivalent
projected military use engine rated at 8,400 hp (6,264 kW) equivalent
Mk 801
Mk 45
Marinised ship powerplant
Essentially similar to the RM1A
Essentially similar to the RM1A


Aeritalia G.222
Avro Lincoln
Breguet Atlantic
Canadair CL-44
Conroy Skymonster
Short Belfast
Transall C-160
Vickers Vanguard

The marine version, the Rolls-Royce Tyne RM1A, RM1C and RM3C remained in service as the cruise gas turbines in Royal Navy Type 42 destroyers and Type 22 frigates until the retirement of the 4 Batch 3 Type 22 frigates (2011) and the last remaining Type 42 Destroyer (2013).


Tyne RTy.20 Mk 21
Type: Twin-spool turboprop
Length: 108.724 in (2,762 mm)
Diameter: 55.12 in (1,400 mm)
Dry weight: 2,391 lb (1,085 kg)
Compressor: Axial, 6-stage LP, 9-stage HP
Combustors: 10 cannular flame tubes
Turbine: 3-stage LP, single-stage HP
Fuel type: Avtur
Oil system: pressure spray/splash with dry sump using DERD 2487 spec. oil
Maximum power output: 6,100 hp (4,549 kW) equivalent power
Overall pressure ratio: 13.5:1
Turbine inlet temperature: 800 °C (1,470 °F)
Specific fuel consumption: 0.485 lb/hp/hr (0.298 kg/kW/hr) for take-off
Power-to-weight ratio: 2.55 hp/lb (4.194 kW/kg)






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