Designed for use in nine to fifteen-ton helicopters, the RTM 322 engine family spans a power range between 2,100 and 2,600 shp.

The RTM 322 currently powers three types: the NH90, a twin-engine military transport/naval frigate helicopter manufactured by NH Industries (a joint venture between Airbus Helicopters, AgustaWestland and Fokker Aerostructures); the AW101, a three-engine military transport built by AgustaWestland; and the Apache AH Mk.1 attack helicopter, a version of the AH-64D built under license by AgustaWestland.

The RTM 322 also powered Airbus Helicopters' X3 technology demonstrator. To date, the RTM 322 powers 90% of the world's fleet of AW101 helicopters and 80% of in-service NH90s. It is used by the air forces of fifteen nations: France, the United Kingdom, Germany, the Netherlands, Denmark, Norway, Sweden, Finland, Portugal, Greece, Belgium, Japan, Oman, New Zealand and Australia.

Today, the RTM 322 is the engine of choice for new-generation military helicopters around the world. In total, over 1,100 engines are in service, between them logging in excess of one million flight hours.

The RTM 322 was the result of a joint development between Safran Helicopter Engines and British manufacturer Rolls-Royce. An initial variant was qualified in 2003 for the British Ministry of Defence. It has since been certified by the European Aviation Safety Agency (EASA).

In 2013, Safran Helicopter Engines acquired the entire RTM 322 program. The engine is now 100% Safran, with the French manufacturer responsible for both production and product support . The acquisition has enabled Safran Helicopter Engines 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.

In its different versions, the RTM 322 now meets the operational needs of all its military customers: tactical transportation, search and rescue (SAR) at sea and in combat zones, and maritime missions, in particular anti-submarine warfare.

With over a million hours flown, often in extremely harsh environments, the RTM 322 meets the highest standards in performance, reliability and robustness. Its architecture includes a high-performance, four-stage compressor (three axial and one centrifugal stage); a two-stage turbine equipped with single-crystal vanes and a highly robust two-stage power turbine. The RTM 322 was designed to maximize performance, particularly in terms of acceleration (maximum power achievable in just three seconds), maintenance (reduced number of parts, easy access to modules) and robustness (enough to withstand extreme marine and desert environments).

Finally, the RTM 322 is equipped with latest-generation, dual-channel Full Authority Digital Engine Control (FADEC) to lighten pilot workload and enhance flight safety and mission success.