Sunday, September 11, 2016

Aircraft de-icing and anti-icing

Aircraft de-icing and anti-icing plays an important role in air travel. During cold weather operations aircraft are more prominent to ice formation on it's their surface.

Aircraft fuselage upper section, Wings and engine lips are the most vulnerable places for ice formation. As formed ice can add extra eight to the aircraft and distort the streamline shape of the wings that lead to significant reduction in lift.

Adding extra weight and experiencing a reduction in lift at the most critical phase of the flight can endanger the safety of passengers and crew with the aircraft.

Hence it's paramount important to remove the ice deposited on the aircraft, mainly in wings, fuselage and engine lips. As per the regulations no ice is allowed on the aircraft surface before the take-off. In cold weather operations most of the aircraft undergo de-icing and anti-icing to eliminate the risk of ice and snow.

De-icing is the process of removing accumulated frost,snow and ice from the aircraft body using a solvent. Anti-icing means applying a solvent to the aircraft body which prevents further accumulation of ice.

Anti-icing fluids act as Freezing Point Depressant that delays the further ice formation (FPD). In modern commercial aircraft de-icing is done before the departure followed by anti-icing.

Anti-ice fluids remain on the aircraft surface as a fluid coating and avoid further formation of ice. KillFrost ABC is a widely used solvent for these purposes.

Most of the commercial aircraft are fitted with an anti-ice system that avoids ice formation on engine lips, wing leading edges, windshields and probes with the aid of electrical heaters and hot bleed air.

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