cranfield0042

gyroscop effect rigid rotat propel engin wing vibrat mode mani wing vibrat analys found necessari take account effect flexibl mount engin henc reason ask vibratori gyroscop effect flexibl may give rise propel whirl engin mount may thought horizont beam cantilev wing horizont vertic flexibl beam infinit rigid horizont vibrat gyroscop moment induc propel due result pitch motion axi would produc propel axi yaw howev engin mount later stiff tical stiff gyroscop effect play role propel axi undergo pitch vibrat tip cantilev engin mount purpos paper investig role assumpt propel rigid disc paper divid four part part deal briefli classic gyroscop theori part present engin vibrat mode studi experiment photograph techniqu model gyroscop mount end two differ cantilev beam part present theori coupl motion elast wing upon gyroscop mount simul engin propel system airplan part consist exampl theori part take thought reason paramet result obtain show whirl rigid propel may materi affect wing normal mode shape frequenc