Helicopter blade mandrel
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United States of America Patent
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Apr 24, 2012
Grant Date -
Sep 16, 2010
app pub date -
May 26, 2010
filing date -
Dec 27, 2006
priority date (Note) -
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Abstract
Methods and apparatus are provided for making a rotor blade spar from composite material wherein a multi-component mandrel is used to form the composite spar. The mandrel is made using a number of components, which are assembled to provide a structure that is sufficiently strong to maintain the spar shape during pre-cure lay up, compaction and curing of the composite material. The multiple components used to form the mandrel can be separated from each other and easily removed from the spar either before or after curing of the composite material. The mandrel components can then be re-assembled and re-used to form additional composite spars.
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