D-nose

D-nose

D-nose
Very strong leading edges of an airfoil formed from heavy skin and spar. They often form the structural basis of the entire airfoil as in the rotors of helicopters. Also called D-spar.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
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Instead of the traditional "D-nose," says Ticona, the composites have enabled designers to create a more efficient "J-nose." This design allows it to house electrical, de-icing, and other systems.