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 is 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 3,150 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 eight million flight hours.
The 2R is the latest development in the Arrius 2 family. Selected in 2013 to power Bell Helicopter 505 Jet Ranger X, the Arrius 2R is the only engine in the 500 shp range to be equipped with a dual-channel Full Authority Digital Engine Control system (FADEC). Thanks to the eight million flight hours already accumulated by the Arrius 2 family, the 2R offer an unmatched level of maturity at entry-into-service. It was designed to deliver a take-off power of 504 shp and a cruise power of 457 shp.
In April 2014, the first test run of the Arrius 2R took place at Safran Helicopter Engines's factory in Bordes. The Bell 505's first flight took place in November 2014 at Mirabel in Canada. It has been been certified in December 2015, and has entered into service early 2017.
Like all other Arrius 2 engines, the architecture of the 2R comprises two main modules, which facilitates maintenance operations. Equipped with the latest technologies, the 2R also represents a reduced environmental footprint.
The engine is assembled at Safran Helicopter Engines's USA site in Dallas, Texas.