What method is used to de-ice the horizontal stabilizer leading edge?

What method is used to de-ice the horizontal stabilizer leading edge?

• A. Electromagnetic expulsion de-icing (EMED)
• B. Glycol-based spray de-icing
• C. Hot air circulation de-icing
• D. Pneumatic boot de-icing

Answer: (A)

De-icing the horizontal stabilizer leading edge is done with electromagnetic expulsion de-icing. This system delivers fast, high-energy electromagnetic pulses to a conductor embedded in the leading edge, creating a mechanical impulse that shakes or otherwise detaches ice from the surface without using fluids or continuous heating. It’s well-suited for the tail because it provides rapid ice removal with minimal weight and avoids the plumbing, residue, and drag concerns that fluid-based or heat-based systems can introduce on a slender, critical surface. Glycol-based spray relies on chemical fluid to prevent or shed ice, but it can leave residues, add drag, and is harder to apply effectively on the tail. Hot air circulation needs extensive ducting to reach the tail and heats the surface continuously, which can be less efficient for a small leading-edge area. Pneumatic boots rely on inflatable membranes to crack ice; on the horizontal stabilizer’s leading edge, boots add weight, complexity, and may not perform as well on that geometry and speed. So the electromagnetic expulsion approach is chosen because it clears ice efficiently on the stabilizer leading edge without the drawbacks of fluids, heat, or inflatable surfaces.

De-icing the horizontal stabilizer leading edge is done with electromagnetic expulsion de-icing. This system delivers fast, high-energy electromagnetic pulses to a conductor embedded in the leading edge, creating a mechanical impulse that shakes or otherwise detaches ice from the surface without using fluids or continuous heating. It’s well-suited for the tail because it provides rapid ice removal with minimal weight and avoids the plumbing, residue, and drag concerns that fluid-based or heat-based systems can introduce on a slender, critical surface.

Glycol-based spray relies on chemical fluid to prevent or shed ice, but it can leave residues, add drag, and is harder to apply effectively on the tail. Hot air circulation needs extensive ducting to reach the tail and heats the surface continuously, which can be less efficient for a small leading-edge area. Pneumatic boots rely on inflatable membranes to crack ice; on the horizontal stabilizer’s leading edge, boots add weight, complexity, and may not perform as well on that geometry and speed.

So the electromagnetic expulsion approach is chosen because it clears ice efficiently on the stabilizer leading edge without the drawbacks of fluids, heat, or inflatable surfaces.