Fan blade apparatus
AssigneeROLLS-ROYCE plc
InventorsJohn Whurr, Martyn Richards
Life of this patent
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Abstract
A gas turbine engine fan blade apparatus is disclosed comprising a reverse pitch rotatable mounting and an aerofoil part. The aerofoil part comprises radially inner and radially outer portions that are separated by an interface extending from a leading edge of the aerofoil part to a trailing edge of the aerofoil part. The reverse pitch rotatable mounting locates the radially inner and radially outer portions with respect to one another. The reverse pitch rotatable mounting and separation at the interface permit relative pitch change rotation between the radially inner and radially outer portions such that one of the radially inner and radially outer portions is rotatable to a reverse pitch configuration by comparison with the other portion.
Claims10
A gas turbine engine fan blade apparatus comprising:
- first and second variable pitch rotatable mountings;
- an aerofoil part, the airfoil part comprising a radially inner portion and a radially outer portion mounted by the first and second variable pitch rotatable mountings;
- and
- a pitch change mechanism connected to the radially inner portion and the radially outer portion, wherein the pitch change mechanism is arranged to provide:
- a first configuration in which the radially inner portion and the radially outer portion are aligned and have any pitch value within a range of forward pitch values, the radially inner portion and the radially outer portion in the first configuration being aligned from a leading edge to a trailing edge of the aerofoil part, and
- a second configuration in which the radially inner portion has a finest forward pitch value of the range of forward pitch values and the radially outer portion is rotated to a reverse pitch.
Dependencies are inferred from the claim text.