Central Aerohydrodynamic Institute
RUS
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TsAGI testing large-scale model of MS-21 aircraft

29 July 2014

The Central Aerohydrodynamic Institute named after Prof. N.E. Zhukovsky (TsAGI) completed the first phase of testing the large-scale model of the MS-21 aircraft. The research task is to confirm the preliminary calculations of aerodynamic characteristics of controls and wing devices. In particular, the scientists were interested in hinge moments and loads acting on the inner section of the slat, flap, stabilizer console, landing gear doors, elevator and rudder, spoilers and ailerons. The experiment was conducted in a subsonic wind tunnel in a “take-off-and-landing” mode with a screen simulating the runway. The work was ordered by Irkut Corporation JSC.

To test the large-scale model TsAGI experts designed special-purpose unique five-component strain-gauge scales. A total of 20 scales were installed — a record number for this type of experiment. They were simultaneously informing on loads and moments acting on control airfoils.

“It should be noted that due to high production costs, such large-scale models have not been produced since the Soviet era,” said Division Head of Aircraft and Rockets Aerodynamics Department Gennady Andreev, PhD in Engineering. “We conduct our research on a large-scale model aircraft made in a 1:8 scale. This allows obtaining data closest to the real performance values, so the results of these tests are particularly valuable. The studies have confirmed the preliminary analysis performed by designers of Irkut Corporation JSC. I am referring, in particular, to evaluation of the power of the boosters — the drives opening the gear doors.”

In the near future the Russian aviation science center will start a new phase of studies of the effect of the screen on the aerodynamic characteristics of the model. This time, the height of the rack on which the model MS-21 is installed will be reduced by almost half (6–7 m from the runway in actual practice). The scientists expect that these experiments will provide interesting results, as under these conditions loads on individual controls and wing devices can be specified.

The MS-21 is a Russian passenger aircraft developed by Irkut Corporation JSC. The new airliner will have broad operational capabilities, focused on the Russian and world civil aircraft market. The MS-21 will have high fuel efficiency, increased flight range, unique stationing characteristics, the possibility of operation in all climatic zones, at any time of day, in normal and adverse weather conditions, as well as at high-altitude airfields.

TsAGI Press Service
+7 (495) 556-40-38
press@tsagi.ru

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