Type III anti-icing fluid is intended for which type of aircraft?

Type III anti-icing fluid is intended for which type of aircraft?

• A. Slower aircraft with rotation speed less than 100 knots.
• B. Rotorcraft only.
• C. Large jets at high speeds.
• D. Used only for preflight battery warming.

Answer: (A)

Type III anti-icing fluid is designed for slower, light- to medium-weight aircraft whose takeoff rotation speeds are under roughly 100 knots. Its viscosity is intermediate—more protective than Type I but not as heavy as Type II/IV—so it provides a practical holdover time for smaller airplanes without the drag and weight penalties of the higher-viscosity fluids. It isn’t intended for rotorcraft or for large jets at high speeds, and it’s not used for preflight battery warming. In short, Type III fits slower fixed-wing aircraft that need a modest holdover time.

Type III anti-icing fluid is designed for slower, light- to medium-weight aircraft whose takeoff rotation speeds are under roughly 100 knots. Its viscosity is intermediate—more protective than Type I but not as heavy as Type II/IV—so it provides a practical holdover time for smaller airplanes without the drag and weight penalties of the higher-viscosity fluids. It isn’t intended for rotorcraft or for large jets at high speeds, and it’s not used for preflight battery warming. In short, Type III fits slower fixed-wing aircraft that need a modest holdover time.