Intended for two-to-five-ton single and twin-engine helicopters, the Arriel engine family spans a power range of 590 to 1000 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 12 000 Arriel engines and the global fleet has logged more than 46 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 2C / 2C2
The Arriel 2C and 2C2 variants power several Airbus Helicopters Dauphin models. The Arriel 2C powers the AS365N3+, a 4.3-ton, twin-engine helicopter capable of carrying twelve passengers. It also powers the Chinese Z9 manufactured by Avicopter. The Arriel 2C is capable of a take-off power of 839 shp, a cruise power of 779 shp and a maximum power, via the One Engine Inoperative (OEI) rating, of 962 shp. Certified in 2002, the Arriel 2C2 powers the H155, a 4.9-ton, twin-engine helicopter capable of carrying 13 passengers. The Arriel 2C2 is capable of a take-off power of 944 shp, a cruise power of 853 shp and a maximum power, via the One Engine Inoperative (OEI) rating, of 1054 shp. A variant of the Arriel 2C2, the 2C2CG, was selected to re-engine the US Coast Guards' fleet of MH-65C Dolphin helicopters for sea rescue operations. The first of these engines were delivered in 2004 and the first re-engined Dolphin entered service in 2005. During 2015, the US Coast Guard will mark one million flight hours using this Arriel variant. The Arriel 2C2CG was also selected to modernize the Brazilian Army's AS565 Panthers.