Generally, Icing is divided into two types:
1) Opaque Rime (or Rime Ice)
2) Clear Ice (or Glaze Ice)



















Opaque Rime
This type of icing that forms on aircraft skin is brittle because it normally happens when small Supercooled Water Droplets (SCWD) strike on the aircraft skin and become frozen immediately and thus trapping pockets of air inside it. Rime ice is easily removed and lighter than Clear Ice.























Clear Ice
Clear ice is normally associated with large SCWD. During impact with aircraft skin, only a small portion of the droplets freezes, while the remaining portion flows back over the surface and freezes gradually as a smooth solid sheet of ice. It is much harder to removed and heavier as compared to Rime Ice.





Effects of Icing on aircraft:
1) Increase stalling speed and decreases stalling angle
2) Increase total weight of aircraft
3) Increase drag
4) Decrease top of climb
5) Decrease rate of climb
6) Controls may frozen up
7) Lift is reduced.
8) Windscreen become blurry - Visibility is reduced.
9) Pitot head and static vent may be blocked - Pressure-related instruments will become useless.
10) Engine flame out.