CT7-8A

The CT7-8A engine equips the Sikorsky S92 civil helicopter with two 2500 shp class engines, which can transport up to 16 people plus 2 crew with a range of 1,000 km.

Avio is responsible for the production of the accessory drive train of the engine and deals with the procurement of certain parts (gears, bearings, seals), under their direct manufacture (housing, adapter), as well as the engine assembly in order to deliver a ready-to-use product to the customer.

Avio is partner of GE for the motorisation of the CT7-8A (a variation of the T700 base motorisation) with a 40% share.

Main engine characteristics

Fan diameter	Max 26 inches
Overall pressure ratio	18 (at Max power)
Bypass ratio	2/2
Takeoff Rating at Sae Level	Max 2,634Shp

Leaflet - CT7-8A

Avio's module details

Accessory Drive Train

Avio is responsible for the production of the accessory drive train of the CT7-8A engines.

Avio deals with the procurement of certain parts (gears, bearings, seals), their manufacture (housing and adapter) and assembly in order to deliver a ready-to-use product to the customer.

The accessory drive train comprises the injection gearbox (which transfers torque from the HP engine shaft to the accessory gearbox), the vertical shaft (that links the injection gearbox to that of the accessories), the accessory gearbox, which is supported on the upper part of the external engine compressor case and activates 6 accessories.

Low Pressure Turbine

Avio is responsible for the production of the:
- fourth-stage nozzle and seal
- third- and fourth-stage airfoil

Products

Accessory Drive Train

Low Pressure Turbine

Applications

S92