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Flashcards in Exam 3 Deck (122)
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1

Source that the pilot controls and which will allow sufficient operation of electrical equipment should the generator fail.

Primary Power

2

Engine driven device (alternator or generator) which generates power to supply all normal loads and charge the battery

Generated Power

3

An alternate power source that is arranged so that it is available to the pilot, even if the aircraft battery is dead (the 152 does not have one!).

Auxiliary Power

4

Strips of copper with holes drilled in them at appropriate intervals which are connected to one side of a row of circuit breakers and to incoming power

Busbars

5

Remove power from a component if the circuit becomes overloaded

Circuit Breakers

6

Perform basically the same function as a circuit breaker, but cannot be reset

Fuses

7

Used in an electric circuit for protection and current control.

Resistors

8

Electron “check valves”that allow the flow of electrons in one direction, but not in the opposite direction.

Diodes

9

Used to control the availability of power to various components.

Switches

10

Found in electrical systems to drive fuel booster pumps, flaps, etc.

Motors

11

Used exclusively in pitot tubes, windshield heat, etc.

Heating Elements

12

Used in flap switches and act in the same manner as normal switches.

Micro-Switches

13

Remote controlled electrical switches.

Relays

14

Lead acid

Battery

15

Completes the electrical circuit, which closes or opens the battery relay.

Masterswitch

16

Shows the rate of charge or discharge from the battery

Ammeter

17

Displays the load or amp draw placed on the alternator.
•Battery
•Electrical Equipment

Load Meter

18

A solenoid that when closed will supply electrical power to the starter.

Starter Relay

19

Completes an electrical circuit, which closes or opens the starter relay.

Starter Switch

20

Rotates the crankshaft for engine start.

Starter Motor

21

for reciprocating engines FAR's Require the following:

•Two separate spark plugs for each cylinder
•Two separate circuits and sources of electrical energy, supplying spark to each cylinder.

22

Magneto Ignition System Operating Principals

1.The magneto system consists of a rotating magnet and the core of the magneto coil.
2.The rotating magnet is a permanent magnet.
3.The core of the magneto coil is a conductor.
4.As the magneto rotates, the core of the magneto coil cuts the lines of flux in the magnet, thereby inducing EMF in the core.

23

Consists of the primary winding of the coil, the breaker points, the capacitor, and the ignition switch.

Primary Circuit

24

Consists of approx 200 turns of copper wire wound over the core.

Primary Windings

25

Opens and closes the circuit of the coil and is timed to produce a maximum buildup and then release of the magnetic field.

Breaker Point

26

Acts as a storage chamber to absorb the sudden rise in voltage in the coil when the breaker is open.
•Voltage can be amplified by a change in the primary windings.

Condenser

27

Consists of the secondary winding of the coil, the distributor, the ignition harness, and the spark plugs.

Secondary Electrical System

28

Center of the distributor rotor.

High Voltage Contact

29

Will distribute the voltage to the ignition harness (spark plug lead).

Distributor Rotor

30

Will distribute the spark to the spark plug.
•Ignition harnesses are made of stranded copper or stainless steel, surrounded by rubber insulation.

Ignition Harnesses