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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.
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The first order for the RTM322 was received in 1992 to power 44 Royal Navy Merlin HM1s which subsequently entered service in 1998. According to Rolls-Royce 1,500 engines are made or ordered, and about 80% of AW101's use the engine.
In 2013, Turbomeca acquired the entire RTM 322 program. The engine is now 100% Turbomeca, with the French manufacturer responsible for both production and product support . The acquisition has enabled Turbomeca to strengthen its position in the high-power segment of the market, in preparation for the upcoming launch of the HPE (High-Power Engine) family of turbines within the 2,500 - 3,000+ shp bracket.