Dual-channel deicing system for a rotary wing aircraft
US8550402B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2005 |
| Grant date | Oct 8, 2013 |
| Priority date | — |
| Expiry date | Nov 5, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C27/04
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A deicing system includes dual deice system components to provide a redundant deice system. Each redundant portion of the system generally includes a controller, an air data computer, an ice rate controller, and an ice rate probe. The controller communicating a heating cycle which defines a multiple of electric pulse trains to sequentially provides power to a multiple of heating elements in a designated blade set. Each electric pulse train is defined by an element on-time, a null time between the element on-time for this element and the next element, and an off-time between repetition of the heating cycle for the first heater element. The element on-time is a function of outside air temperature (OAT). The off-time is a function of liquid water content. The tail rotor heating cycle is a more straightforward version of the main rotor heating cycle as each of the tail rotor blade are activated simultaneously and there is only a single heating element on each tail rotor blade.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.