Bearingless Tail Rotor Loads and Stability.

摘要

Four wind tunnel model tests were conducted on a model flex-strap bearingless tail rotor was studied for aeroelastic stability characteristics and loads. In all, 12 individual rotor parameters were investigated to determine their effect on aeroelastic stability. All data required to define the structural and aerodynamic characteristics of the basic model and structural data required to define the test stand and drive system are presented. In addition, the physical properties required to describe the various parameters are documented, thus providing a complete description of each configuration tested. The effect of each test parameter on the aeroelastic stability boundaries is indicated through plots of actual measured boundaries. Where available, the alternating strap loads for these configurations are presented. A limited amount of analysis was conducted and seemed to correlate with the test results.