B - Operations – Transporting – 64 – D
Patent
B - Operations, Transporting
64
D
244/106, 327/2.1
B64D 15/12 (2006.01) B64D 15/00 (2006.01) H05B 6/00 (2006.01)
Patent
CA 1078026
ABSTRACT OF THE DISCLOSURE The present invention relates generally to aircraft deicing systems, and, more particularly, to deicers for use in helicopters. The problems relating to the formation of ice on aircraft are well known, and date from the early days of aviation. Various techniques have been employed in an attempt to avoid the problem of aircraft icing. Early deicing devices were mechanical, employing an inflatable cover or boot to crack the ice layer. Other prior art deicers employ electric resistance heating elements buried beneath the airfoil surfaces. The principal problem with these is that they heat a large section of airfoil surface, whether covered with ice or not. Helicopters are, of course, just as prone to icing problems as fixed-wing aircraft. In addition, there is a practical difficulty in supplying deicing power to a rotating surface. The present invention resides in aircraft deicing apparatus, and a related method for its use, in which microwave electromagnetic energy is transmitted into a surface layer of ice, and is dissolved in the ice as heat, melting the ice layer in a very efficient manner. The apparatus of the invention includes means for generating microwave electromagnetic energy, distribu- tion means for transmitting the energy to a surface of the aircraft on which ice can form, and coupling means, for coupling the microwave energy for transmission into the surface layer of ice in such a manner as to propagate the energy through the ice layer acting as a surface waveguide.
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