Arrius engines cover a power range of between 450 and 750 shp. They are intended for single and twin-engine helicopters weighing between 1.5 and 3.2 tonnes.
The Arrius features a simple and robust design. Two main modules, a reduction gearbox and a gas generator module, facilitate maintenance operations. Depending on the variant, Time Between Overhaul (TBO) is between 3,000 and 4,000 hours.
It comprises a single-stage centrifugal compressor, a single-stage turbine and a power turbine. Earlier variants have a hydro-mechanical control system while more recent ones are equipped with Full Authority Digital Engine Control (FADEC).
Efficient, compact and robust, the engine has been chosen to power numerous light helicopters, in particular the H135 (Arrius 2B2Plus) and H120 (Arrius 2F) from Airbus Helicopters. The 2K2 model drives the AW109 Power developed by AgustaWestland and the 2G1 was chosen by Russian Helicopters for its Ka-226T.
In 2013, the Arrius 2R was selected to power the new Bell 505 Jet Ranger X developed by Bell Helicopter. It will the first Bell product to be powered by a Safran engine.
Early versions of the Arrius 2 entered service in 1996. The continuous integration of new technologies has enabled the engine to stay at the leading edge of progress.
Arrius engines comply with the highest market standards in terms of reliability and safety, particularly for single-engine applications.
To date, over 3,000 Arrius engines have been built by Safran Helicopter Engines. The worldwide Arrius fleet, distributed among 430 customers in 60 different countries, has accumulated more than seven million flight hours.
The Arrius 2B2 powers the EC135 T2 developed by Airbus Helicopters. With a take-off power of 633 shp and a cruise power of 580 shp, it is one of the most powerful variants in the Arrius range. Maximum power available via the One Engine Inoperative (OEI) rating is 803 shp.
Like all Arrius 2 versions, the 2B2 is notable for high levels of reliability and simplified maintenance procedures. This makes it the ideal engine for police, Emergency Medical Services (EMS) and VIP transport helicopters.
Time between Overhaul (TBO) of the Arrius 2B2 is 4,000 hours.