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 Turbomeca'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, Turbomeca 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.

- See more at: http://www.turbomeca.com/helicopter-engines/lower-1000-shp/arriel#sthash.igiMDI8m.dpuf