Sikorsky Aircraft Corporation

Darryl A Tetrault

Stephen B Povroznik, Iii

Timothy R Budd

A rotary blade includes a blade body, one or more heater elements, and a temperature sensing circuit. The one or more heater elements are connected to the blade body. The temperature sensing circuit is in thermal communication with the blade body and is electrically isolated from the one or more heater elements for determining actual temperature of the rotary blade independent of operation of the one or more heater elements.

Ice protection systems

A triggering system includes a source lead, a ground lead, primary and secondary actuation circuits, and a serializing switch. Both the primary and second actuation circuits are connected to the source lead and the serializing switch has first and second positions. In a first position, the serializing switch connects the primary and secondary actuation circuit in parallel for actuating primary and secondary cartridge activated devices. In a second position, the serializing switch connects the secondary actuation circuit in series with the primary actuation circuit for verifying that the actuation circuits can reliably actuate both cartridge activated devices.

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Wallingford, CT, United States of America

Darryl A Tetrault