What is alternate air for in aircraft?

In all airplanes with alternate air, the alternate is also used as an emergency bypass of the air filter in the event of a filter blockage or obstruction.

Under what operating conditions should the carburetor heat and or alternate air be used to prevent the formation of carburetor ice?

If carburetor icing conditions are suspected and closed-throttle operation anticipated, adjust the carburetor heat to the full ON position before closing the throttle and leave it on during the closed-throttle operation. The heat aids in vaporizing the fuel and helps prevent the formation of carburetor ice.

What is impact icing?

Impact ice, a type of induction icing, can occur anywhere that temperatures are near to, or colder than, the freezing point of 0° C. Impact ice can block the air filter and rob the engine of air needed for combustion, even on a fuel injected engine.

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What are the three main components of the air induction system?

The three major components of the air induction systems that increase internal combustion engine efficiency are blowers, superchargers, and turbochargers. They may be of the centrifugal or rotary type, gear driven directly from the engine, or driven by the flow of exhaust gases from the engine.

What are three types of induction icing?

Induction system icing is generally classified in three types:

  • Impact ice.
  • Fuel evaporation ice.
  • Throttle ice.

What are the indications of carburetor icing?

The classic symptoms of carb ice are reduced power and a rough-running engine. In aircraft with fixed pitch propellers, the first indication is typically a small decrease in engine rpm.

What is the chief disadvantage of the float type carburetor?

The effect that abrupt maneuvers have on the float action and the fact that its fuel must be discharged at low pressure leads to incomplete vaporization and difficulty in discharging fuel into some types of supercharged systems. The chief disadvantage of the float carburetor, however, is its icing tendency.

What is instrument icing?


Icing of the pitot tube as seen in figure 96 re- duces ram air pressure on the airspeed indicator and renders the instrument unreliable. Most mod- ern aircraft also have an outside static pressure port as part of the pitot-static system.

What is fuel evaporation ice?

Fuel evaporation ice or refrigeration ice is formed because of the decrease in air temperature resulting from the evaporation of fuel after it is introduced into the airstream. As the fuel evaporates, the temperature is lowered in the area where the evaporation takes place.

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What are known icing conditions?

“Known ice” involves the situation where ice formation is actually detected or observed. “Known icing conditions” involve instead circumstances where a reasonable pilot would expect a substantial likelihood of ice formation on the aircraft based upon all information available to that pilot.

How does an air induction system work?

Located directly behind the front grille, the air intake system draws air through a long plastic tube going into the air filter housing, which will be mixed with the car fuel. Only then will the air be sent to the intake manifold that supplies the fuel/air mixture to the engine cylinders.

What is an air induction system?

An air induction system is specifically used to maintain balance between air and fuel when it enters a combustion chamber. This system is crucial in determining the performance of an engine.

What is the purpose of air induction system?

The whole purpose of the air induction system is to supply, filter, meter, and measure intake air flow into the engine. The air enters into the system through the special holes created in front of the car. The first step is to clean the air, removing the unwanted air born particles with the help of an air cleaner.

What is aircraft throttle ice?

Throttle Ice.

It is formed at or near a partly closed throttle valve (sometimes called the “butterfly valve”). The water vapour in the induction air condenses and freezes due to the venturi effect cooling the air as it passes the throttle valve.

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What is induction system?

The components of an engine involved in delivering fuel and air into the combustion chamber. The system includes the fuel injectors, the intake manifold, the throttle body and the air metering device (on petrol engines), intake valves and the air filter assembly.

What are the three basic regulating components of a sea level boosted turbocharger system?

What are the three basic regulating components of a sea-level boosted turbocharger system? 1)Exhaust bypass assembly, 2) Density controller, 3) Differential pressure controller. reduces bootstrapping during part-throttle operation.