Hollow fan blade with honeycomb filler
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United States of America Patent
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Sep 1, 2015
Grant Date -
Mar 13, 2014
app pub date -
Sep 12, 2012
filing date -
Sep 12, 2012
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Abstract
A fan blade has an airfoil main body extending between a leading edge and a trailing edge. The airfoil also has suction and pressure sides. A cavity is formed into said main body, and receives a filler material. A cover closes off the cavity, and is attached to the main body, with the cover having a thickness defined in a direction perpendicular to the suction side. The main body has a spar which extends along the cavity, with a thickness of the spar at a central location between ends of the cavity which has a second thickness. A ratio of the first thickness to the second thickness is between 0.5 and 2. A fan rotor and a gas turbine engine are also disclosed.
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