27 May 2016

Rostec’s Technodinamika Holding has completed the first stage of endurance tests of MC-21 landing gear actuating cylinders. The product successfully demonstrated a life of 250 takeoffs and landings, which will be extended to 60,000 takeoffs and landings over the next 5 years. A set of hydraulic cylinders for the first flight model has already been delivered to the customer. Endurance tests of landing gear and door up-locks for MC-21 aircraft will start soon.

The Technodinamika Holding, part of the Rostec State Corporation, has carried out the Stage 1 endurance tests of nose and main gear door actuating cylinders for the MC-21 aircraft. Furthermore, the product has passed separate static tests and burst tests by internal pressure.

Preliminary separate tests to substantiate the specified life are conducted by stages. Stage 1 – tests to an extent providing safety of the first flight – includes substantiating a life of 250 takeoffs and landings at normal, high and low temperatures.

“To date, this stage has been passed,” said Technodinamika CEO Maxim Kuzyuk. “This ensures that the aircraft can safely take off with our hydraulic cylinders which have proved their life of 250 takeoffs and landings.” He added that the total scope of endurance tests is 600,000 cycles and will last for about 5 years, during which the life will be extended to 60,000 takeoffs and landings.

Climatic, static and endurance tests of landing gear and door up-locks for the MC-21 will start soon. If the tests are successful, the set of up-locks will be delivered to the United Aircraft Corporation for aircraft-level tests.