Aircraft propeller with improved electrically de-icer leads

Details Aircraft propeller with improved electrically de-icer leads Aircraft propeller with improved electrically de-icer leads

1989-12-07

1991-06-04

Look, Edward K.

Aeronautics and astronautics

Aircraft structure

Ice prevention

416 30, 416 39, 174110V, 174119R, H05B 100

Patent

active

050207415

ABSTRACT:
A multiple blade aircraft propeller hub has a bulkhead supporting concentric slip rings connected by slide blocks to the aircraft electrical system. Electrical conducting flexible leads connect the slip rings to electrical heating elements or de-icing boots carried by the propeller blades. Each of the leads includes an elongated flexible braided copper tube for conducting electricity and which loosely surrounds a flexible multiple strand stainless steel cable, and an extruded flexible vinyl insulating tube loosely surrounds the braided tube. The leads provide for minimizing stresses and metal fatigue in the electrical conducting braided tube with changes in blade pitch and thereby provide for a substantially extended service life.

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patent: 4699568 (1987-10-01), Harlamert et al.
patent: 4743712 (1988-05-01), Lee

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