Turboprop engine TV7-117SM

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Factory designation: Izdeliye 65

The TV7-117SM is a modernized version of the TV7-117 engine, originally developed in the mid-2000s. It is designed for use in the Ilyushin Il-114-300 aircraft and meets modern performance requirements, offering low fuel consumption, extended service life, increased reliability, and improved environmental performance within its class of turboprop engines.

The engine features a modular design, ensuring reduced operating costs and lower maintenance man-hours.

Turboprop engine TV7-117S/SM dimensional drawing.

Structure and Basic Features
The engine consists of:
- an axial-centrifugal compressor (five-stage axial and single-stage centrifugal)
- an annular combustion chamber
- a two-stage free turbine
- a propeller reduction gearbox
- a full authority digital engine control (FADEC) system, BARK-765

The turbine drives, through a reduction gearbox, a six-bladed SV-34(M) propeller with a diameter of 3.6 m.

The engine is equipped with a six-bladed, reversible, feathering SV-34 propeller developed by Aerosila JSC. The propeller blades are made of polymer composite materials.

Key propeller parameters include:
Takeoff power: 3.050 kgf
Maximum cruising speed: 575 km/h
Maximum operating altitude: up to 7.200 m

Modifications
In 2017, a decision was made to transition to the uprated TV7-117ST modification, developed on the basis of the TV7-117SM and intended for installation on the Il-114-300 aircraft. Integration of the engine into other aircraft of the same class is also possible.

Technical specifications