Intended for two-to-five-ton single and twin-engine helicopters, the Arriel engine family spans a power range of 590 to 990 shp.

The Arriel is Safran Helicopter Engines's best-selling engine. Since the first two models were certified in 1977, over thirty variants have been developed and certified, and are now installed on more than 40 different types of helicopter. To date, Safran Helicopter Engines has produced more than 11,500 Arriel engines and the global fleet has logged more than 42 million flight hours.

The Arriel meets the highest market standards in terms of reliability and robustness. It is equally as reliable as the CFM56 engine is in its category.

The Arriel family is divided into two product lines: Arriel 1 and Arriel 2. Their power ranges are, respectively, from 590 to 750 shp and 830 to 990 shp.

The Arriel 1 features a simple design, centered around five modules for easy maintenance. It comprises a single-stage axial compressor, a single-stage centrifugal compressor, a two-stage gas generator turbine and a single-stage power turbine.

The Arriel 2 is a significant development of the Arriel 1, offering greater power and a simpler single-stage turbine architecture. It also features Full Authority Digital Engine Control (FADEC).

Unveiled in 2011, the Arriel 2+ is an upgrade of the Arriel 2 and is intended for the most modern single- and twin-engine helicopters. The Arriel 2+ incorporates new technologies, notably a new axial compressor and new manufacturing materials for turbine blades.

The Arriel 2+ offers increased performances and reduced specific fuel consumption, resulting in lower operating costs. It includes an engine data recording system to monitor the turbine's hot sections.

Around the world, every day, an Arriel-powered helicopter takes off every 15 seconds of.

Arriel 2S1 / 2S2

The Arriel 2S1 and 2S2 are used to power the Sikorsky S-76C+ and S-76C++.

Certified in 2002, the Arriel 2S1 in the S-76C+ is capable of a take-off power of 856 shp and a cruising power of 787 shp. Its maximum power available via the One Engine Inoperative (OEI) rating is 986 shp.

Certified in 2005, the Arriel 2S2 in the S-76C++ is six per cent more powerful than the Arriel 2S1, and offers an unrivaled level of reliability. The engine delivers a take-off power of 923 shp, a cruise power of 832 shp and a maximum One Engine Inoperative (OEI) rating of 1033 shp.

The Arriel 2S2 builds on the essential characteristics of the Arriel 2 family, namely, a modular design to simplify maintenance, an efficient and robust gas generator and a dual-channel Full Authority Digital Engine Control (FADEC).