Abstract
Results are presented from a study undertaken to validate a rotorcraft mathematical model for simulation of autogyro e ight. Although this class of rotary-wing aircraft has found limited application in areas other than sport or recreational e ying, commercial interest is increasing. A sparsecontemporary literature on autogyro e ight emphasizes the timeliness of this work, which takes advantage of e ight experiments using a fully instrumented autogyro.Validationisbasedoncomparisonsoftrim,linearizedsix-degree-of-freedomderivatives,andtimehistory response of the full nonlinear model to control inputs. The validation process is a vital ingredient in dee ning the applicability of a mathematical model as an engineering tool for supporting studies into aircraft stability, control, andhandlingqualities.Themodelisofgeneric,nonlinear,individualblade/bladeelementtype,anditscone guration as an autogyro is described. It is concluded that simulation of autogyro e ight presents no particular dife culties for a generic rotorcraft model. Limitations in predictive capability are clearly delineated, although in general comparisons between e ight and theory are good.
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