Which one of the following device is needed for carburetor used i

SOLUTION

Explanation:

Carburetor System

• It is classified as either float type or pressure type.
• The float type of carburetor, completed with idling, accelerating, mixture control, idle cutoff, and power enrichment system is probably the most common of all carburetor types.
• Pressure carburetors are usually not found on small aircraft. The basic difference between a float type and a pressure type carburetor is the delivery of fuel.

Mixture control

• Carburetors are normally calibrated at sea level pressure, where the correct fuel-to-air mixture ratio is established with the mixture control set in the FULL RICH position.
• However, as altitude increases, the density of air entering the carburetor decreases, while the density of the fuel remains the same.
• This creates a progressively richer mixture, which can result in engine roughness and an appreciable loss of power.

Carburetor Icing

• One of the main disadvantages of the float type carburetor is its icing tendency.
• Carburetor ice occurs due to the effect of fuel vaporization and the decrease in air pressure in the venturi, which causes a sharp temperature drop in carburetor.
• If water vapor in the air condenses when the carburetor temperature is at or below freezing, ice may form on the internal surfaces of the carburetor. Due to this, it reduces the power of the propeller.
• Therefore, in aircraft carburetor, an Automatic de-icing unit and Altitude mixture correction device must be required.