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 1D1 / 1E2
Arriel 1D1 and 1E2 engines are installed on various Airbus Helicopters models. The Arriel 1D1 powers the single-engine AS350B2 Ecureuil, while the Arriel 1E2 is aboard the twin-engine EC145 and BK 117C. The two variants build on the essential characteristics of every Arriel, namely, a modular design to simplify maintenance and an efficient and robust gas generator. As part of a contract awarded in July 2006 to power the UH-72A Lakota, a variant of the EC145 assembled at Airbus Helicopters Inc. in Columbus, Mississippi, more than 800 Arriel 1E2 engines are entering service with the US Army. The Arriel 1D1 delivers a take-off power of 732 shp and a cruising power of 625 shp. The Arriel 1E2, for its part, offers a take-off power of 738 shp and a cruising power of 692 shp. Its maximum power available in the One Engine Inoperative (OEI) rating is 771 shp.