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  • Chapter 3: Induction & Exhaust Systems › Reciprocating Engine Induction Systems › Basic Carburetor Induction System

    Figure 3-5. Location of a carburetor heat air valve. The carburetor air ducts consist of a fixed duct riveted to the nose cowling and a flexible duct between the fixed duct and the carburetor air valve housing. The carburetor ... air ducts normally provide a passage for outside air to the carburetor. Applying carburetor heat to an operating engine decreases the density of the air, which leans the air-fuel mixture. Air enters the system through the ram-air intake…

  • Chapter 16: Cabin Environmental Control Systems › Air Cycle Air Conditioning › System Operation

    Air Cycle Air Conditioning Air cycle air conditioning prepares engine bleed air to pressurize the aircraft cabin. The temperature and quantity of the air must be controlled to maintain a comfortable cabin environment at all altitudes and on the ground ... air cycle system is often called the air conditioning package or pack. It is usually located in the lower half of the fuselage or in the tail section of turbine-powered aircraft. [Figure 16-62] System Operation Even with…

  • Chapter 3: Induction & Exhaust Systems › Turbine Engine Inlet Systems

    Figure 3-24. An example of a turbine engine inlet. As aircraft speed increases, thrust tends to decrease somewhat; as the aircraft speed reaches a certain point, ram recovery compensates for the losses caused by the increases in speed ... inlet must be able to recover as much of the total pressure of the free airstream as possible. As air molecules are trapped and begin to be compressed in the inlet, much of the pressure loss is recovered. This added…