On Calculation of Moment Coefficients of Self-Damping and Effectiveness of Air Steering Rudders of 'Flying Platform' on Hovering Regime

摘要

Control of ducted-fan helicopter of the 'flying platform' type is carried out in most cases by air vanes with the help of which during calculation of self-damping of the platform there is ensured both a proper margin of stability and also a definite speed of attenuation of perturbed motions. First order of approximations give simple calculating formulas for appraisal of effectiveness of air vanes and self-damping of 'flying platform' on conditions of hovering. (Author)