SUSPENSION SYSTEM FOR DYNAMICALLY SIMILAR AIRCRAFT MODELS FOR WIND TUNNELS OF LOW SPEEDS Russian patent published in 2022 - IPC G01M9/00 G01M9/06 

FIELD: experimental dynamic aeroelasticity.

SUBSTANCE: invention relates to the field of experimental dynamic aeroelasticity and concerns the experimental determination of the critical speed and flutter frequency of dynamically similar models of aircraft (DSM AC) in low-speed wind tunnels (WT) with a closed working part under conditions close to the conditions of free flight of AC. The suspension system contains two cables oriented in the vertical direction in the plane of symmetry of the wind tunnel, to which the DSM of the aircraft is attached in the plane of its symmetry. Moreover, the first attachment point is located in front of the center of gravity of the DSM of the aircraft, and the second - behind the center of gravity of the DSM of the aircraft at a distance that is equal to or greater than the radius of inertia of the DSM of the aircraft. In addition, the suspension system contains four cables located in a horizontal plane, oriented to the axis of symmetry of the aircraft DSM at an angle ranging from 30 to 60 degrees, the aircraft DSM is attached to these cables. All cables are connected to the wind tunnel bearing surfaces by means of elastic elements, which are fixed torsion bars. All cables are made of Kevlar fiber.

EFFECT: ensuring the possibility of obtaining undistorted test results for the aircraft DSM flutter.

4 cl, 3 dwg