Russian Helicopters completes flight tests on the Mi-171A2

The Mi-171A2 is fitted with composite rotor blades.

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Russian Helicopters (part of State Corporation Rostec, Moscow) announced that the Mi-171A2 flying laboratory has concluded the second phase of its preliminary flight test. A total of 67 ground runs and 72 flights were carried out at the flight test center at the company’s Mil Moscow Helicopter Plant.

During phase one, 43 flights were conducted on the helicopter, which features composite main rotor blades and X-shaped tail rotor. The second phase of tests saw the installation of VK-2500PS-03 engines and BARK-6V7S digital regulation and control systems, a modified stabilizer and anti-torque. The tests were designed to review the VK-2500PS-03 engines, stabilizer, anti-torque and main rotor with plans to conduct additional certification testing on the Mi-171A2.

Currently, the flying laboratory is being re-equipped for tethered ground testing and the helicopter will be installed on-site after the Mi-38 concludes relay testing. This phase of tests will focus on the rotor transmission and control mechanisms, establishing whether they meet flight regulation AP-29.

The first prototype of the Mi-171A2 will simultaneously undergo preliminary tests, with 42 out of 178 flights already concluded. The second prototype of the Mi-171A2 is currently undergoing final preparations and will soon be incorporated into this flight test program.

Unlike the flying laboratory, the first and second Mi-171A2 prototypes are equipped with an integrated digital KBO-17 avionics suite developed by Ulyanovsk Instrument Design Bureau. This system is built to a 'glass cockpit' design and makes it possible to cut crew numbers to two people. The KBO-17 suite makes it possible to carry out flights day and night in regular and difficult weather conditions. This equipment meets the latest requirements relating to communications, navigation and control. Thanks to the on-board controls monitoring the condition of the helicopter's various systems and components, the helicopter can be operated in line with its technical condition.