Patent ID: 6077040
Filing Date: 2000-06-20
Classification: B24C,B64C

Abstract:
A propeller blade pitch control system for a propeller having a non-rotatable portion and a rotatable portion while in operation, comprising:a transfer tube, wherein said transfer tube defines an element of said rotatable portion and wherein said transfer tube is axially non-translating relative said rotatable and non-rotatable portions;means for providing hydraulic fluid to and interfacing with said transfer tube, wherein said means for providing is located on said non-rotatable portion;means for changing the pitch of said propeller blade;means for actuating said means for changing, wherein said means for actuating is fluidically connected to and axially translatable relative to said transfer tube; andmeans for measuring blade angle of said propeller blade, wherein said means for measuring is separate and distinct from said transfer tube.