Russian Helicopters Mi-171A2 Completes First Flight | Aviation International News

Russian Helicopters Mi-171A2 Completes First Flight

On the latest evolution of the ubiquitous Mi-8/17, a crew of two will suffice.

Russian Helicopters' Mi-171A2 medium twin logged its first flight on November 25. Testing confirmed the 24-passenger helicopter's top speed of 150 knots. (Photo: Russian Helicopters)

By Thierry Dubois • Writer

November 25, 2014

The first prototype of Russian Helicopters' Mi-171A2 medium twin made its maiden flight today, one month after hover testing started. This followed ground runs of the prototype and flight-testing of the rotor system and engine on a Mi-171LL “flying laboratory.” The ground tests suggested a 20-percent increase in cruise and maximum speeds, 1,700 pounds more main rotor thrust and reduced vibration, Russian Helicopters said. The Mi-171A2's maximum speed of 150 knots was subsequently confirmed during the first flight.

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