Rotorcraft Report: Sikorsky Upgrades Avionics

By Staff Writer | June 1, 2009
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Curtiss-Wright Corporation will be supplying fly-by-wire transducers for Sikorsky UH-60Ms and CH-53Ks. The contract is worth $20 million during 15 years.

"The multi-channel linear variable displacement transducers (LVDTs) Curtiss-Wright Controls will deliver for Sikorsky UH-60M Upgrade and CH-53K airframes will be used as position sensors located inside actuators manufactured by Claverham Ltd.," said David Adams, co-chief operating officer of Curtiss-Wright. Functionally, the transducers’ electrical signals are fed into the flight control computer and then compared to the pilot’s command signal. Under this contract, Curtiss-Wright will supply four different LVDT designs for Claverham actuators connected to the main and tail rotors.


The installation of C-W LDVTs is part of an ongoing upgrade process for both Black Hawk and Super Stallion rotorcraft. Moving to fly-by-wire technology "greatly lessens pilot workload," Adams said. "To do so, the current hydraulic actuation system is being replaced. The sensors (shown above) being supplied by Curtiss-Wright Controls feature multi-channel redundancy for high reliability and are custom-designed to fit within Claverham’s actuators."

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