MS-21 completed its first flight as part of certification testings.

Here's the revised article:

The MS-21-310 aircraft is essentially a machine made up of components that will be used to manufacture series of Russian civilian aircraft in the future. Due to a lack of cooperation with foreign suppliers, Russian engineers have developed numerous domestic parts and assemblies for the MS-21. The key aspect is the use of domestic engines, PD-14.

A four-hour test flight was organised to assess the quality and range of the radio communication equipment, according to "Aviation Russia" portal.

Nikolay Fonurin, Deputy Chief of the Flight Test and Final Assembly Complex for Civil Aviation Technology of PJSC "Yakovlev," stated that the flight was part of a supplementary certification testing program. Two experimental planes will be involved: 73055 (test number MS.0012) and 73057 (MS.0013).

"In the 12th plane, we'll be evaluating the radio communication equipment, fire safety system, and part of the pilot navigation equipment," Fonurin said. "On the 13th, we'll focus on testing the fuel system, hydraulic, de-icing, and other components."

It's already known that subsequent stages of the certification testing will be carried out at various airfields across Russia. For instance, tests in natural icing conditions are planned for Archangel, and studies on shimmy ("wing flutter") will be conducted at the airfield base in Ul'yanovsk.

Let's remind ourselves, the wing flutter effect - rapid oscillations (frequency of 4-10 Hz) on the nose landing gear wheels of a transport vehicle - occurs during takeoff and landing in intense side and longitudinal tire oscillations, resulting from the interaction of the runway, tires, landing gear, and aircraft's wing.

The current test stage represents one type of frequency tests, and its successful completion will ensure the aircraft is safe in operation and stable against flicker and wing flutter phenomenon.

Thus, the MS-21-310 certification testing program includes comprehensive checks on multiple planes and in various climate conditions, allowing for a thorough assessment of all systems on this latest Russian civilian airliner.

Additional Insights:

Radio Communication Equipment: Various radio communication systems have been actively tested at different altitudes to validate their operational integrity and compliance with certification requirements.
Fire Safety: During the certification process, fire detection and suppression systems in the engine compartments, cargo hold, and cabin will be tested.
Pilot Navigation Equipment: Navigation systems are being validated for accuracy and reliability under varied flight conditions during the certification tests. Experienced test pilots and flight test engineers are involved in this process.
Fuel System: The fuel system undergoes rigorous checks, including fuel flow management, leak detection, and emergency procedures, to ensure safe operation during all phases of flight.
Shimmy Tests: Shimmy tests, which evaluate the nose landing gear’s behavior to prevent oscillations that can cause structural damage, are typically conducted on the ground and during taxiing phases.

Important Dates & Locations:

Flight Test and Final Assembly Complex for Civil Aviation Technology of PJSC "Yakovlev" – The supplementary certification testing program for MS-21-310 began here.
Ramenskoye Airport - Initial certification flights for the test aircraft with tail number 73055 took place here.
Gromov Flight Research Institute, Zhukovsky - Serves as a principal testing ground for flight tests, including radio communication and navigation system verifications, among others.

In the upcoming evaluations of the MS-21-310 aircraft, the fiscal year budget may need to include expenditures for testing space-and-astronomy related equipment, such as satellite communication systems, to establish its compatibility with existing industry standards in the aerospace sector.
Now that domestic engines, PD-14, are being used in the MS-21-310, financial institutions might consider funding research projects focusing on innovative energy management systems for finance sector efficiency, deriving insights from the streamlined performance of these power-efficient engines in the science and industry domains.