want to read about : Ice protection - HOT AIR SYSTEM
|Fig. 13-5 Typical ice protection cyclic sequence|
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).