Carburetor icing

Other additives to gasoline often include detergents to reduce the buildup of engine deposits, anti-icing agents to prevent stalling caused by carburetor icing, and antioxidants (oxidation inhibitors) used to reduce gum formation. 

Additive to prevent carburetor icing and gas line freeze... 

For an excellent story involving carburetor ice, read E. Gann s Fate is the Hunter.)... 

Seidom is dew point caicuiated for water in humid air. It s too important and very easy to measure. It is a very important statistic for general aviation pilots, as it is used to calculate the likelihood of carburetor icing and fog. It s measured by using a polished metal mirror which is cooled as air is passed over it. The temperature at which dew forms is, by definition, the dew point. The method for calculation described in detail with cleaning solvents and Nitrogen is given in Endnote XX. 

Ice can form in an engine carbiu etor when air cools to below the dew point and the freezing temperature. Some of the cooling is due to the heat of vaporization of the fuel some is adiabatic cooling as the air pressure decreases in the venturi (the narrow portion of the carbiu etor where pressure is lowest and fuel is sucked into the airstream). Carburetor icing can occur even when the outside air temperature is above freezing. 

In a certain engine s carbiu etor, air must cool adiabatically to 5 °C or lower before ice can form. A plane is flying at 1500 m, and air pressure in the venturi is equivalent to atmospheric pressure at 4500 m. Under which of the following conditions could carburetor icing potentially occur ... 

Plugging due to ice, although causing power loss oj even m or seizing, was reversible however the development of recycled crankcase gas resulted in iri ii sibfe solid organic deposits on the walls of the system, especially in the carburetor. 

Use Hydraulic brake fluids, printing inks, coupling agent and penetrant for textiles, fuel and lubricant additive, emulsifying agent, inhibitor of ice formation in carburetors, cosmetics. 

Anti-Icing Additives—minimize engine stalling and starting problems by preventing ice formation in the carburetor and fuel system... 

Kerofluid . [BASF AG] Additives to prevent ice fcnnation in carburetors and jet engines. 

Products and Uses Various applications include brake fluids, inks, cosmetics, fabric finishing or sizing, fuel and lubricant additive prevents ice forming in carburetors. Used as an additive and emulsifier (maintains mixes in suspension). 

Isopropyl alcohol is extensively used in cosmetics, particularly for hair and skin lotions, and in pharmacy for preparations intended for external use. A further large area of use is the paint and printing ink industry. Isopropyl alcohol is added to fuels to prevent the icing up of the carburetor and increase the octane number. It is an important feedstock for the chemical industry, for example, in the production of acetone (particularly in the United States), esters, plasticizers, and ethers. Isopropyl alcohol is also important as a solvent (e.g., for recrystallization and extraction) and as a moistening agent for cellulose nitrate. It is furthermore used in the aerosol sector. 

Ammonium caseinate ice inhibitor, carburetors Hexyiene giycoi ice mfg., artificiai n-Pentane... 

Minimize oxidation and gum formation during storage Deactivate trace metals that can accelerate oxidation Minimize rust throughout the gasoline supply chain Minimize ice in carburetors during cold weather Control deposition of carbon on intake valves Control deposition of carbon in combustion chambers Methylcyclopentadienyl manganese tricarbonyl (MMT)... 

---