Lesson 10 Aircraft Electrical Systems Aircraft Electrical Systems
- Slides: 29
Lesson 10: Aircraft Electrical Systems
Aircraft Electrical Systems • A circuit must have at least three parts.
Aircraft Electrical Systems • A circuit must have at least three parts. • The source
Aircraft Electrical Systems • A circuit must have at least three parts. • The source • The electron transportation and distribution system
Aircraft Electrical Systems • A circuit must have at least three parts. • The source • The electron transportation and distribution system • The load (Where the work is done)
Series And Parallel Circuits • Series Circuit • All electrons must flow through all active components. • The amount of voltage dropped across the filament is always less than the total. • Voltage drop depends on the amount of resistance of the individual load.
Series And Parallel Circuits • Parallel Circuit • A portion of the electrons flow through each filament. • The amount of voltage drop is equal to the total voltage produced by the source.
Voltage And Current Measuring Instruments • Current and voltage are the most commonly measured variables. • Voltmeters • Ammeters
Voltage And Current Measuring Instruments • Voltmeters (Parallel) • Measures current but indicates values of voltage. • Indicates electrical system condition.
Voltage And Current Measuring Instruments • Ammeters • Measures current flow • Battery is charging when electrons are flowing from the positive terminal. • This would be a positive indication.
The Aircraft Electrical System
The Aircraft Electrical System • Source • 12 volt battery with the negative terminal connected to the airframe (negative ground). • Master solenoid • Master switch
The Aircraft Electrical System • The Starter Circuit • Starter switch circuit (control circuit) • Starter solenoid circuit (motor circuit) • The master switch/solenoid circuit must also be connected.
The Aircraft Electrical System • The Busbar • Rigid point that is a convenient place to terminate many wires neatly and safely. • Connected to the positive terminal of the battery, when the master switch is on. • Same electrical potential as the battery. • Circuit breakers are often mounted.
The Aircraft Electrical System • The Alternator • The alternator switch completes a circuit to the voltage regulator. • The voltage regulator samples the system voltage and increases or decreases the field voltage which limits alternator output.
The Aircraft Electrical System • Ammeters And Loadmeter In The Circuit • Installed between the master solenoid and the busbar. • Senses the amount and direction of current flow in the battery circuit. • Installed between A terminal of the alternator and the busbar. • Senses current flow (in one direction), or output, of the alternator (loadmeter).
Ignition Systems
Battery Ignition System
Magnetos • Completely independent of the electrical system of the airplane. • Primary current is interrupted by a set of breaker points, and high voltage for the spark plugs comes from the voltage step-up in the magneto coil. • Rotating Magneto
Rotating Magneto
Rotating Magneto • Resultant Flux (E-gap) • Maximum current is flowing several degrees after neutral.
Rotating Magneto
Rotating Magneto • Dual Magnetos • High-tension Magnetos • Low-tension Magnetos
High-tension Magneto
Low-tension Magneto
Rotating Magneto • Aids To Starting • Magnetos provide a good, hot spark at idle, at cruise, and at high speed. • But not when the engine is turning slowly during start. » Impulse Coupling
Impulse coupling • A small spring-loaded coupling between the magneto shaft and the engine drive gear.
Impulse coupling
Vibrator starting system “Shower of Sparks” • Pulsating DC from the induction vibrator is directed into the magneto coil.
- Aircraft electrical system components
- Aircraft electrical parts
- Aircraft hydraulic systems
- Lesson 5 introduction to electrical devices
- Lesson 1: electrical safety culture
- Lesson 7 electrical safety
- Lesson 1 electrical safety culture
- Lesson 5: electrical nonmetallic tubing (ent)
- Rising main electrical distribution
- Mechanical system modeling examples
- Introduction to electrical power systems
- One electrical systems
- Keel surface aircraft
- Aircraft configuration management
- Airplane maintenance manual
- Aircraft maintenance planning and control
- Ogv engine
- Onboard inert gas generation system
- Faa logbook entry example
- Aircraft instrument system
- Aircraft hydraulic system components
- Ils markers
- Aircraft financing structures
- Grumman aircraft engineering corporation
- Search and rescue aircraft signals
- Static margin
- Aircraft static margin
- Cpa aviation
- Aircraft static margin
- Visual aids for navigation