Rolls-Royce Tyne

The Rolls-Royce RB.109 Tyne was a 2 shaft turboprop developed in the late 1950's by Rolls-Royce Limited, primarily for the Vickers Vanguard airliner, but also later for the Dassault-Breguet Atlantique long-range reconnaissance aircraft, Canadair CL-44 and Transport Allianz Transall transport aircraft.

The marine version, the Rolls-Royce Tyne RM1A, RM1C and RM3C are still in service as the cruise gas turbines in Royal Navy Type 42 destroyers and Type 22 frigates.

A single stage HP turbine drove the 9 stage HP compressor, whilst a 3 stage LP turbine drove, not only the propeller (via a reduction gearbox), but a 6 stage LP compressor. The combustor was cannular.

So the Tyne, like the ill-fated Bristol Orion, had a shared-load LP turbine, as opposed to a free power turbine, as used in the Bristol Proteus and most modern turboprop engines.

The Mark 515 Tyne had a nominal Take-off power output of 5,730 shp, flat rated to ISA+16.8C. The marine versions develop up to 9,700 shp.

Many aero engines remain in service in Transalls with the French, German and Turkish airforces and will do so until 2015. Similarly marine versions remain in service and will do so until at least 2014.