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Improved Mi-171E in flight tests

15th December 2017 - 15:30 GMT | by The Shephard News Team

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Flight testing of the upgraded Mi-171E multipurpose helicopter is now underway at Russian Helicopters’ Ulan-Ude Aviation Plant.

The Mi-171E has been improved with a K-2500PS-03 engine with emergency mode power of 2700HP and FADEC-type digital control system, upgraded rotor system and X-shaped tail rotor with blades made of polymer composite materials, and new swash plate, modified stabiliser and keel beam. Digital de-icing system for composite blades of main and tail rotor has also been added, along with a Safir 5K/G MI auxiliary power unit with a 20kW generator.

According to the company, the new systems and components are lighter and require less maintenance than those they replaced.

Leonid Belykh, managing director of the Ulan-Ude Aviation Plant, said: ‘Equipment of Mi-171E helicopter with a new carrier system allowed to increase the maximum speed, increase the flight range and external sling payload, and to make flights in the thin air of high altitudes and in high temperatures more reliable.

'Also, a new form of blades of tail and main rotor makes it possible to significantly reduce the noise level.’

Testing is planned to finish by the end of the 2017.

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