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11 Cards in this Set
- Front
- Back
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What would likely cause a reciprocating engine equipped with a float carburetor to hesitate momentarily when the throttle is rapidly advanced from idle to full power? |
Malfunctioning accelerator pump. |
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Why do aircraft fuel metering systems for reciprocating engines have mixture controls? |
The mixture control allows the fuel to be decreased to maintain fuel air mixture ratios that produce the desired power. Because as the density decreases as the aircraft ascends, the mixture becomes richer. |
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What are the two types of fuel injection systems used on modern reciprocating aircraft engines? |
Teledyne Continental or TCM system Precision Airmotive Bendix system |
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What is meant by a compensated fuel pump? |
A pump that senses the ambient air pressure and maintains the fuel pressure at specific amounts above this air pressure. |
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What is used in the TCM fuel injection system to control the amount of fuel sent to the nozzles? |
The relief valve for low speed operation. The adjustable orifice for high speed operation. |
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What is used in the precision Airmotive system or Bendix to control the amount of fuel sent to the nozzles? |
The air diaphragm that controls the servo ball valve in the line between the regulator and the flow divider. |
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Where are the fuel strainers normally located in an aircraft fuel system? |
In the tank outlet, the main strainer is at the lowest point in the fuel system. |
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What are two types of fuel heaters used in a jet transport Aircraft? |
Air-to-fuel and oil-to-fuel heat exchangers. |
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What kind of fuel boost pumps are normally installed inside the fuel tanks? |
Centrifugal pumps. |
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What two things are adjusted when setting the idling conditions on the float carburetor? |
Idling RPM by adjusting the throttle stop. Idling mixture by adjusting idle needle valve. |
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What are three functions of the boost pump in the tank of a jet transport aircraft? |
1. To pressurize the fuel in the line between the tank and the engine-driven pump. 2. To transfer fuel from one tank to another to balance the fuel load. 3. To pump Fuel from the tank into the pump chute when fuel is being dumped. |
