TsAGI studies lightweight convertible aircraft with modified empennage
5 February 2019
Specialists of the Zhukovsky Central AeroHydrodynamic Institute (TsAGI, a member of the National Research Center “Zhukovsky Institute”) tested a model of a lightweight convertible aircraft with modified empennage. The experiments were conducted in TsAGI’s low-speed wind tunnel.
Previously TsAGI experts developed a concept of a lightweight convertible aircraft (LCA) and tested several variants of model items, including cryogenically powered. There was also conducted anti-icing research.
Based on the previous tests’ analysis, there was developed a new horizon tail configuration. The profiling and geometrical parameters of the stabilizer were optimized. The Institute’s scientists also changed the shape of the aerodynamically-balanced elevators to improve their effectiveness.
The testing of the model with a new empennage was conventionally divided into two cycles. In the first phase there were received the characteristics of directional stability of the model at takeoff and landing, and at cruising flight without considering the airflow from the screws. As a result of the research, TsAGI specialists experimentally confirmed the stability margin improvement and defined the optimal rigging angle of the new stabilizer.
The next testing phase is planned to be hold in March of this year. Scientists of the Leading Centre of aeronautical science will do experimental investigations of an aircraft model with a running propeller. In addition, there will be estimated the leading-edge effectiveness and strake influence on the horizontal tail.
The lightweight convertible aircraft will be utilized both for passenger and for freight without changing the design. The aircraft is designed to transport 50 passengers over a distance of 1500 km or 6 tons of cargo at a distance of 1000 km. Its cruising speed will reach 480 km/h.