Rolls-Royce_RB.162 Knowpia

RB.162
Type	Turbojet
Manufacturer	Rolls-Royce Limited
First run	January 1962
Major applications	Hawker Siddeley Trident; Dornier Do 31
Number built	86

The Rolls-Royce RB.162 is a lightweight British turbojet engine produced by Rolls-Royce Limited. Developed in the early 1960s, it was specially designed for use as a lift engine for VTOL aircraft but was also used in a later variant of the Hawker Siddeley Trident airliner as an auxiliary boost engine. A smaller related variant, the RB.181 remained a design project only, as did a turbofan version designated RB.175.

Design and development edit

The RB.162 was designed to meet an anticipated need for a lift engine to power VTOL aircraft with the emphasis on simplicity, durability and lightweight construction. Development costs were shared by Britain, France and Germany after signing a joint memorandum of agreement.^[1] The engine featured fibre glass compressor casings and plastic compressor blades to save weight which also had the effect of reducing production costs. The engine has no oil system, a metered dose of oil instead being injected into the two main bearings by the compressed air used to turn the compressor at startup.^[2] Although the RB.162 was a successful design, the expected large VTOL aircraft market did not materialise and the engine was only produced in limited numbers.^[3] The French government invested in losses 79 million French francs (1970 value, or 94 million euros in 2022 values) between 1960 and 1966 for the Mirage IIIV.^[4]

Development for the Trident edit

In 1966 British European Airways (BEA) had a requirement for an extended range aircraft to serve Mediterranean destinations. After a plan to operate a mixed fleet of Boeing 727 and 737 aircraft was not approved by the British Government^[5] Hawker Siddeley offered BEA a stretched and improved performance version of the Trident that they were already operating. This variant, the Trident 3B, used, in addition to its three Rolls-Royce Spey turbofan engines, a centrally mounted RB.162-86 which was used for takeoff and climb in the hot prevailing conditions of the Mediterranean area. The 'boost' engine was shut down for cruising flight. Some conversion was needed for the change from vertical to horizontal installation. With the RB.162 fitted the Trident 3B had a 15% increase in thrust over the earlier variants for an engine weight penalty of only 5%.^[6]

RB175 and 181 edit

A design study for a turbofan version of the RB.162 was designated RB175.^[7] Another projected derivative, the RB.181 was to be a scaled-down version of the RB.162 producing approximately 2,000 lbs of thrust. Seven of these lift engines were to power the unbuilt Lockheed/Short Brothers CL-704 VTOL variant of the F-104 Starfighter.^[8]

Applications edit

Engines on display edit

A preserved Rolls-Royce RB.162 is on public display at the Royal Air Force Museum Cosford.^[9]
An RB.162-4D is on display at the Deutsches Museum, Munich.
An RB.162 is on display in the Foyer in the Department Of Engineering at the University of Liverpool.
A part-sectioned RB.162 is on display at the Rolls-Royce Heritage Trust Collection, (Derby).
An RB162-86 (from Trident 3) is on display at the East Midlands Aeropark, adjacent to the East Midlands Airport.

Specifications (RB.162-86) edit

Rolls-Royce RB.162-4D on display at the Dornier Museum Friedrichshafen

Data from ^[10]^[11]

General characteristics

Type: Single spool turbojet
Length: 51.6 in (1311 mm)
Diameter: 25.0 in (635 mm)
Dry weight: 280 lbs (127 kg)

Components

Compressor: 6-stage axial flow
Combustors: Annular
Turbine: Single-stage axial flow

Performance

Maximum thrust: 5,250 lb (23 kN)
Air mass flow: 86 lb/sec (39 kg/s)
Thrust-to-weight ratio: 18.75

References edit

Notes edit

^ Gunston 1989, p.150.
^ "Archived copy". Archived from the original on 6 March 2016. Retrieved 31 January 2012.{{cite web}}: CS1 maint: archived copy as title (link)
^ Gunston 1989, p.150.
^ https://www.hydroretro.net/etudegh/SNECMA_debuts_cooperation.pdf p. 16
^ Swanborough 1971, p.89.
^ Swanborough 1971, p.90.
^ Flight International, 7 January 1965 www.flightglobal.com Retrieved: 31 December 2009
^ Flightglobal archive - Flight - June 1962 Retrieved: 21 July 2009
^ RAF Museum Cosford - RB.162 Archived 5 June 2011 at the Wayback Machine www.rafmuseum.org.uk Retrieved: 27 January 2010
^ Gunston 1989, p.151.
^ Swanborough 1971, p.88.

Bibliography edit

Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9
Swanborough, Gordon. Air Enthusiast, Volume One. London: Pilot Press, 1971. ISBN 0-385-08171-5.