Patent ID: 9145776
Filing Date: 2015-09-29
Classification: B64C,B64D,F01D,F02C,F02K,F05D,Y02T,Y10T

Abstract:
1. A blade assembly comprising: a hub which is rotatable about an axis; at least one blade having an aerofoil portion and a root, wherein the root is coupled to the hub using a primary retention device which prevents radial separation of the root and hub in normal use while supporting the at least one blade for rotation about a longitudinal axis of the at least one blade relative to the hub; and, a secondary retention device having a root part and a hub part, the root part being located radially inwards of the hub part in a retention cavity in use, wherein at least a portion of the root part enters the retention cavity via an interlock which prevents radial separation of the root and hub in the event of a primary retention device failure.