Patent ID: 8573927
Filing Date: 2013-11-05
Classification: B64C,B64D,F01D,F02C,F02K,F05D,Y02T

Abstract:
1. A back-up featherer for an engine arrangement having a main hydraulic actuator which angularly displaces propellers of a propeller assembly of the engine arrangement, the engine arrangement further having one or more fluid supply lines for transferring hydraulic fluid between a hydraulic pressure power source located on a static structure of the engine arrangement and the main hydraulic actuator, the back-up featherer having: a back-up actuator assembly for angular displacement of the propellers, the back-up actuator assembly rotating with the propeller assembly, a signal detector that is operatively connected to the back-up actuator assembly and rotates with the propeller assembly, and a back-up rotating coupling, a static side of the back-up rotating coupling being mounted to the static structure of the engine arrangement and communicating with a regulator located on a static structure of the engine arrangement, and a rotating side of the back-up rotating coupling rotating with the propeller assembly and communicating with the signal detector, wherein the back-up actuator assembly angularly displaces the propellers when the signal detector detects a signal from the regulator to displace the propellers.