Rolls-Royce Turbomeca RTM322
|RTM322 cutout at Le Bourget 2009|
|Manufacturer||Rolls-Royce Turbomeca Limited|
|First run||15 December 1984|
|Major applications||AgustaWestland Apache |
|Program cost||£100 million (1985)|
|Developed into||Safran Aneto|
The Rolls-Royce Turbomeca RTM322 is a turboshaft engine produced by Rolls-Royce Turbomeca Limited, a joint venture between Rolls-Royce plc and Turbomeca. The engine was designed to suit a wide range of military and commercial helicopter designs. The RTM322 can also be employed in maritime and industrial applications.
It was designed for the Hughes AH-64 Apache and Sikorsky Blackhawk, competing with the GE T700 and the Pratt & Whitney Canada PW100. The partners shared equally the £100 million development costs, Rolls-Royce makes the turbines, the combustor, and the inlet particle separator while Turbomeca produces the axi-centrifugal compressor and intake. It first ran on 15 December 1984, with eight bench prototypes for 30,000 cycles and 13,000 test hours, and four for flight tests, initially aiming for a 1987 certification.
The first order for the RTM322 was received in 1992 to power 44 Royal Navy Merlin HM1s which subsequently entered service in 1998. Over 1,100 engines are in service, having logged over one million flight hours, powering 60% of the AW101 fleet and 80% of in-service NH90s.
Specifications (Mk 250 or 02/8 variant)
- Type: Turboshaft
- Length: 46.1 in (1.17 m)
- Diameter: 25.5 in (0.65 m)
- Dry weight: 503 lb (228 kg)
- Compressor: 3-stage axial + 1-stage centrifugal
- Combustors: reverse flow
- Turbine: 2-stage HP + 2-stage Power Turbine
- Maximum power output: 2,270 shp (1,693 kW)
- Overall pressure ratio: 14.2
- Power-to-weight ratio: 7.4 kW/kg
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