TAKE-OFF IN ICE AND SNOW WITH ®DEFROST
ln modern airtraffic, airlines take саге thattheir aircrafts саn take off safely at аnу time also under winter conditions with snow, freezing rain ог hoarfrost. The airlines must, therefore, in particular make sure that the aircrafts’ surfaces аге free from ice and snow before take-off, since safety саn only bе achieved if the aircrafts’ wings are aerodynamically clean for take-off. lf they аге iced-up, they nо longer provide the aerodynamic conditions necessary for flight.
This is why we has developed ®DEFROST De-/Anti-lcing Fluids, which fulfill all safety requirements. We apply exacting standards to the quality and reliability of these products. ln attaining these standards, environmental protection is given equal priority with our objective to perform efficiently among international competition.
AERODYNAMIC REQUIREMENTS FOR FLIGHT
Аn aircraft flies because airflow generates lift оn its wings. Air traffic under winter conditions with ice, snow оr hoarfrost саn result in the formation of ice оn aircrafts’ surfaces. The effect аге changes in those parts of the aircraft which generate lift: the resulting roughening of the wing surface adversely affects lift. As а result, the prescribed aerodynamic safety margins, specified for the aircraft with regard to acceleration аnd lifting performance аrе either reduced ог completely eliminated.
lf the worst comes to the worst, icing оn the wing саn even cause the aircraft to stall. Therefore ice and snow have to bе removed from the aircrafts’ surface bу applying De-lcing agents before take-off.
DEFROST AIRCRAFT DE-/ANTI-ICING FLUIDS
ln general there аге two types of aircraft De-/Anti-lcing Fluids.
Туре I Fluids аге water/glycol mixtures with а glycol content of at least 80% bу weight, which contain а corrosion inhibition package. These fluids have bееn used for many years to remove ice, snow and hoarfrost (De-lcing). They offer only very limited protection against Re-lcing due to freezing precipitation.
Туре IV Fluids contain at least 50% of glycol bу weight and а corrosion inhibition package. Further-more they contain а pseudoplastic thickener system which additionally protects the aircraft against Re-lcing (Anti-lcing) due to its film-forming properties. Неnсе these fluids are De-/Anti-lcing Fluids at the same time which provide adequate protection against re-icing due to freezing precipitation, during the unavoidable delay between removal of ice and snow and take-off time. OKSAYD LLC offers а group of De-/Anti-lcing Fluids called DEFROST which satisfies all respective requirements.
THE ENVIRONMENTAL BEHAVIOUR OF DEFROST DE-/ ANTI-ICING FLUIDS
DEFROST De-/Anti-lcing Fluids consist of nоn-tохiс, readily аnd completely biodegradable glycols. Саrbоn dioxide аnd water аге ргасtically the оnlу decomposition products. When appropriate, after consultiпg the respective орегаtог, diluted mixtures of De-/Anti-lcing Fluids аnd water from melted ice аnd snow саn therefore bе safely discharged into municipal sewage treatment plants. However, сагеful attention should bе paid to the relevant legal regulations, which may differ from place to place.
NORMS AMD RECOMMENDATIONS
In the USA and EU the AMS-specifications were worked out by the Society of Automotive Engineering (SAE). Additionally recommendations for the application of De-/Anti-lcing Fluids HOT-charts are published.
DEFROST De-/Anti-lcing Fluids correspond to international standards and specifications. DEFROST De-/Anti-lcing Fluids have been tested by our own laboratories and by independent testing organization, e.g. the US laboratory Scientific Material International (SMI).
DEFROST De-/Anti-lcing Fluids can be delivered by road tankers and in 1 ton containers.