TsAGI Experts Perform Flutter Testing of a Model of Il-112V Military Transport Aircraft
28 July 2016
In July, the first stage of the flutter testing of a dynamically scaled model of Il-112V military transport aircraft was completed in the Central AeroHydrodynamic Institute named after professor N.E. Zhukovsky (part of the National Research Center ‘Institute named after N.E.Zhukovsky‘). The test was conducted in a subsonic wind tunnel.
The model scale is 1:5; wing span — 5.3 m, weight — 300 kg. To provide standardized margin as to flutter critical speed, a flight with a speed of up to 650 km/h was simulated. The tests enabled obtaining different flutter forms and revealing that their critical speed exceeded the specified one — 650 km/h. These results show that there is ample speed margin to provide adequate aircraft protection from flutter. During the test, the experts also studied other parameters having an effect on fuel consumption, payload, structural stiffness and potential in-flight aircraft response.
TsAGI staff will have to do more research, including the second stage of model flutter test and frequency tests of the first flight hardware, to deliver a final conclusion as to aircraft flutter protection.
The next generation light military transport aircraft Il-112V serves to substitute the An-26. The aircraft is intended to operate in various geographical and climatic conditions. It is equipped with state-of-the-art digital avionics equipment.