Propellers

BPERFORMING OPERATIONS TRANSPORTING B64Aviation B64CAEROPLANES HELICOPTERS

B64C11/00Propellers

B64C11/001Shrouded propellers B64C11/002Braking propellers B64C11/003Variable-diameter propellers; Mechanisms therefor B64C11/005Spiral-shaped propellers B64C11/006Paddle wheels B64C11/007Propulsive discs B64C11/008characterised by vibration absorbing or balancing means B64C11/02Hub construction B64C11/04Blade mountings B64C11/06for variable-pitch blades B64C11/065variable only when stationary B64C11/08for non-adjustable blades B64C11/10rigid B64C11/12flexible B64C11/14Spinners B64C11/16Blades B64C11/18Aerodynamic features B64C11/20Constructional features B64C11/205for protecting blades B64C11/22Solid blades B64C11/24Hollow blades B64C11/26Fabricated blades B64C11/28Collapsible or foldable blades B64C11/30Blade pitch-changing mechanisms B64C11/301characterised by blade position indicating means B64C11/303characterised by comprising a governor B64C11/305characterised by being influenced by other control systems B64C11/306specially adapted for contrarotating propellers B64C11/308automatic B64C11/32mechanical B64C11/325comprising feathering, braking or stopping systems B64C11/34automatic B64C11/343actuated by the centrifugal force or the aerodynamic drag acting on the blades B64C11/346actuated by the centrifugal force or the aerodynamic drag acting on auxiliary masses or surfaces B64C11/36non-automatic B64C11/38fluid B64C11/385comprising feathering, braking or stopping systems B64C11/40automatic B64C11/42non-automatic B64C11/44electric B64C11/46Arrangements of or constructional features peculiar to multiple propellers B64C11/48Units of two or more coaxial propellers B64C11/50Phase synchronisation between multiple propellers