Fuel systems Flashcards
What type of fuel injector is incorporated in the induction system?
Bendix RSA-5AD1 type fuel injector
The Bendix RSA-5AD1 is known for its application in aircraft engines.
What principle does the Bendix RSA-5AD1 fuel injector operate on?
Differential pressure
This principle balances air pressure against fuel pressure.
What role does the servo valve play in the fuel system?
Establishes regulated fuel pressure
It applies pressure across the fuel control jetting system.
How does the servo valve affect fuel pressure throughout the metering system?
Causes a minimal drop in fuel pressure
This is crucial for maintaining performance.
What is maintained above most vapor forming conditions?
Metering pressure
This helps prevent fuel vaporization issues.
What type of pump is allowed by the low fuel inlet pressure?
Diaphragm pump
This type of pump is effective under low pressure conditions.
What does the servo system feature check for?
Vapor lock and associated starting problems
This is important for reliable engine starting.
What does the servo regulation do in terms of fuel flow?
Meters fuel flow proportionally with airflow
It maintains the mixture as manually set for all engine speeds.
What component receives metered fuel and distributes it to each cylinder?
Fuel flow divider
This ensures each cylinder receives the correct amount of fuel.
What does the fuel flow portion of the manifold pressure/fuel flow gauge monitor?
Fuel pressure
It converts fuel pressure to an indication of fuel flow in gallons per hour.
What is indicated by the fuel flow gauge?
Fuel flow in gallons per hour and percentage of rated horsepower
This information is critical for engine performance assessment.
What feature does the alternate air source of the induction system have?
A door that functions automatically or manually
This allows for flexibility in air source management.
When does the alternate air source door open automatically?
If the primary source is obstructed
This ensures continued airflow to the engine.
How can the alternate air source door be opened manually?
By moving the selector on the right side of the quadrant
This manual control is essential for pilot intervention.
What should always be used for takeoff?
Primary air source
This is critical for optimal engine performance during takeoff.
What manual should the pilot read to obtain maximum engine efficiency?
Lycoming Operator’s Manual
Following these procedures can extend time between engine overhauls.
