TM 1-1500-204-23-5c. Deicing. An electrical propeller icing controlsystem, as shown in figure 2-13, consists basically of anelectrical energy source, a resistance heating element,system controls, and necessary wiring. The heatingelements are mounted internally or externally on thepropeller spinner and blades. Electrical power from theaircraft system is transferred to the propeller hubthrough electrical leads which terminate in slip rings andbrushes. Flexible connectors are used to transfer powerfrom the hub to the blade elements. Ice removal isaccomplished by converting electrical energy to heatenergy in the heating element.2-16. Propeller Preservation and Storage. MetalPropellers. Preservation and storage of propeller huband dome assembly and blades is described in thefollowing paragraphs.Figure 2-11. Propeller RPM Adjusting ScrewFigure 2-12. Typical Anti-Icing System2-19
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