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The Arriel 1 turboshaft engine features a very simple design, with a reduced number of parts and only five modules for easy maintenance. The Arriel 1 has gained a solid reputation in the helicopter market based on its excellent handling characteristics and high level of reliability. The Arriel 1 has a TBO (Time Between Overhaul) of 3,000 hours, which can be extended to "on condition" on Module 1 and to 6,000 hours on Modules 2 and 4. The Arriel 1S1 powers the twin-engine medium lift Sikorsky S 76 A+, S 76A++ and S76C helicopters. It is particularly well suited for offshore missions. | OEI 2.5 min | 598 kW / 802 shp | | OEI Continuous | 588 kW / 789 shp | | AEO (Take-off) | 541 kW / 725 shp | | AEO (Max. continuous) | 541 kW / 725 shp | | Length | 1,539 mm / 60.6 in | | Width | 493 mm / 19.4 in | | Height | 789 mm / 31 in | | Power Output Shaft Speed | 6,409 rpm |
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