Blade de-icer for rotary wing aircraft
First Claim
1. A rotary blade de-icer for aircraft having a rotor mast and hub, and a multiplicity of airfoil rotor blades, each rotor blade having a root end and an outboard end, with a blade cuff at the root end and a leading edge and a lagging edge, comprising:
- a multiplicity of magnets placed on the rotor mast;
a coil integrated with laminated metal plates mounted on each rotor blade cuff;
the magnets and the coil with laminated plates being mounted in sufficient proximity to each other so that as the rotor turns through its cycle the magnets pass the laminated metal plates so as to induce a high voltage and high current;
electrically conductive lead means for carrying current from the coil down the length of each rotor blade;
electrical resistance heating means connected to said lead means for imparting heat to the blade surface to melt accreted ice.
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Accused Products
Abstract
A blade de-icer for rotary wing aircraft comprises magnets placed around rotor mast and coils with laminated plates installed at the blade cuff of each rotor blade, in sufficient proximity to produce a high voltage, high current pulse every time a magnet and a coil pass each other while the rotor is turning. Electrically conductive cable or wire carries the current down each rotor blade to heating elements which melt any accreted ice on the blade. In one embodiment, magnetic metals are used. In another embodiment, electromagnets are used. In each embodiment, difficult switches for turning the de-icer on and off are provided.
53 Citations
9 Claims
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1. A rotary blade de-icer for aircraft having a rotor mast and hub, and a multiplicity of airfoil rotor blades, each rotor blade having a root end and an outboard end, with a blade cuff at the root end and a leading edge and a lagging edge, comprising:
a multiplicity of magnets placed on the rotor mast;
a coil integrated with laminated metal plates mounted on each rotor blade cuff;
the magnets and the coil with laminated plates being mounted in sufficient proximity to each other so that as the rotor turns through its cycle the magnets pass the laminated metal plates so as to induce a high voltage and high current;
electrically conductive lead means for carrying current from the coil down the length of each rotor blade;
electrical resistance heating means connected to said lead means for imparting heat to the blade surface to melt accreted ice.- View Dependent Claims (2, 3)
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4. A rotary blade de-icer for aircraft having electrical power generating means;
- a rotor mast and hub, and a multiplicity of airfoil rotor blades, each rotor blade having a root end and an outboard end, with a blade cuff at the root end and a leading edge and a lagging edge, comprising;
a multiplicity of electromagnets placed on the rotor mast and connected by electrically conductive wire means to the electrical power generating means;
a coil integrated with laminated metal plates mounted on each rotor blade cuff;
the magnets and the coil with laminated plates being mounted in sufficient proximity to each other so that as the rotor turns through its cycle the magnets pass the laminated metal plates so as to induce a high voltage and high current;
electrically conductive lead means for carrying current from the coil down the length of each rotor blade;
electrical resistance heating means connected to said lead means for imparting heat to the blade surface to melt accreted ice. - View Dependent Claims (5, 6, 7, 8, 9)
- a rotor mast and hub, and a multiplicity of airfoil rotor blades, each rotor blade having a root end and an outboard end, with a blade cuff at the root end and a leading edge and a lagging edge, comprising;
Specification