Ice protection - ELECTRICAL SYSTEM

want to read about : Ice protection - HOT AIR SYSTEM
ELECTRICAL SYSTEM

Fig. 13-5 Typical ice protection cyclic sequence

9. The  electrical  system  of  ice  protection  is generally used for turbo-propeller engine installa- tions, as this form of protection is necessary for the propellers.  The  surfaces  that  require  electrical heating are the air intake cowling of the engine, the  propeller blades and spinner and, when applicable,the oil cooler air intake cowling.
10. Electrical heating pads are bonded to the outer skin of the cowlings. They consist of strip conductors sandwiched between layers of neoprene, or glass cloth impregnated with epoxy resin.  To protect the pads against rain erosion, they are coated with a special, polyurethane-based paint. When the de- icing system is operating, some of the areas are con- tinuously heated to prevent an ice cap forming on the leading edges and also to limit the size of the ice that forms on the areas that are intermittently heated (fig.13-4).