ELECTRICAL SYSTEM

Question 1

ELECTRICAL SYSTEM

Answer 1

28- VOLT DC, SPLIT BUS SYSTEM WITH A NEGATIVE GROUND

Question 2

ELECTRICAL POWER IS SUPPLIED BY

Answer 2

(2) 30- VOLT, 250 AMP DC STARTER GENERATORS
1 BATTERY 24V, 42 AMPS HR

Question 3

BACK UP SOURCE POWER

Answer 3

24- VOLT BATTERY

Question 4

WHAT INTERCONNECTS GENERATOR BUSES?

Answer 4

(2) 325- AMP CURRENT LIMITERS

Question 5

THE ENTIRE BUS SYSTEM OPERATES AS A …

Answer 5

SINGLE BUS, WITH POWER PROVIDED BY THE BATTERY AND THE GENERATORS.

Question 6

EACH SUBPANEL FEEDER SUPLIES TWO DUAL BUSES TRHOUGH…

Answer 6

50 AMP CIRCUIT BREAKERS AND ISOLATION DIODES

Question 7

WHAT SOURCES SUPPLY THE ESSENTIAL COMPONENTS?

Answer 7

HOT BUS (BATTERY) AND SUBPANEL FEEDER.

Question 8

WHAT WILL PROVIDE ONE INVERTER?

Answer 8

400- HERTZ, 115 VAC TO THE AVIONICS/ 400- HZ, 26 VAC TO THE TORQUEMETERS

Question 9

CAPABILITY OF THE BATTERY, GOOD CONDITION

Answer 9

STARTING BOTH ENGINES, BACKUP POWER 30 MINUTES

Question 10

HOW LONG DOES THE BATTERY NEED A CHECK?

Answer 10

18 MONTHS

Question 11

WHAT PROVIDES A LEAD-ACID BATTERY?

Answer 11

24- VOLT, 42- AMP/ HOUR.

Question 12

WHERE DOES THE DC IS OBTAINED?

Answer 12

BOTH GENERATORS AND BATTERY.

Question 13

WHAT DOES THE STARTER GENERATORS DO?

Answer 13

PRODUCE TORQUE FOR STARTING AND GENERATES ELECTRICAL CURRENT FOR STARTING AS WELL

Question 14

WHICH IS THE CURRENT OF THE STARTER GENERATORS?

Answer 14

30V, 250 AMP DC.

Question 15

THE STARTER GENERATORS ACTS AS A STARTER AND …

Answer 15

DRIVES THE ENGINE COMPRESSOR SECTION THROUGH THE ACCESSORY GEARING.

Question 16

AS THE COMPRESSOR TURNS, THE STARTER GENERATORS CAN DRAW UP TO 1,100 AMPS…

Answer 16

JUST BEFORE DROPPING OFF TO 300 AMPS AS THE ENGINE ACCELERATES TO APROX. 20% N1.

Question 17

WHAT DOES THE VOLTAGE REGULATOR MONITOR?

Answer 17

MONITORS THE OUTPUT VOLTAGE OF THE STARTER GENERATOR

Question 18

HOW DOES TEH VOLTAGE REGULATOR MAINTAIN A CONSTANT CHARGE?

Answer 18

IT CONTROLS THE CHARGE TO MAINTAIN IT CONSTANT UNDER DIFFERENT FLIGHT CONDITIONS SUCH AS SPEED, LOAD AND TEMPERATURE.

Question 19

DOES EACH GENERATOR HAVE IT´S OWN VOLTAGE REGULATOR?

Answer 19

YES

Question 20

WHAT DOES THE VOLTAGE REGULATOR PROVIDE?

Answer 20

GENERATOR PARALLEL OPERATION, OVER-VOLTAGE PROTECTION AND OVER-CURRENT PROTECTION

Question 21

HOW DOES THE VOLTAGE REGULATOR BEGIN REGULATING THE GENERATOR´S OUTPUT?

Answer 21

USES RESIDUAL VOLTAGE TO BUILD THE OUTPUT BEFORE THE REGULATION CIRCUIT CAN CONTROL IT.

Question 22

WHAT HAPPENS WHEN THE RESIDUAL VOLTAGE IS APPLIED?

Answer 22

THE FIELD IS EXITED, AND THE OUTPUT INCREASES TO A LEVEL SUFFICIENT FOR THE CIRCUIT CONTROL REGULATOR TO TAKE OVER.

Question 23

WHAT IS THE ROLE OF THE STARTER- GENERATOR´S OUTPUT REGULATOR?

Answer 23

THE OUTPUT REGULATOR ENSURES THE VOLTAGE REMAINS AT 28.25V, AND THE LOADMETERS WILL INDICATE NO OVER-VOLTAGE. THE OUTPUT GENERATOR IS AT LEAST 0.6 VDC HIGHER THAN THE BUS VOLTAGE.

Question 24

WHAT HAPPENS WHEN THE REVERSE CURRENT RELAY IS ENERGIZED?

Answer 24

THE STARTER GENERATOR´S OUTPUT IS CONNECTED TO THE “GENERATOR BUS”

Question 25

ENGINE FAILURE BELOW TAKEOFF SPEED

Answer 25

POWER - IDLE
BRAKES - AS REQUIRED
IF LEAVING RUNWAY….
CONDITION LEVERS - CUT-OFF
FUEL FIREWALL VALVES - CLOSED
ELECTRIC POWER - OFF (GANG BAR DOWN)
BOOST PUMPS - OFF

Question 26

ENGINE FAILURE AFTER TAKEOFF

Answer 26

POWER LEVERS - FULL FORWARD
PROPELLERS - FULL FORWARD
AIRSPEED - 100 (VXSE) 107 (VYSE)
LANDING GEAR - UP
FLAPS -UP
IDENTIFY - DEAD FOOT, DEAD ENGINE
PROPELLER (INOP ENG) - FEATHER

Question 27

CLEAN UP (INOP ENGINE)

Answer 27

CONDITION LEVER - CUT-OFF
BLEED AIR - OFF
AUTO IGNITION - OFF
FUEL FIREWALL VALVE - CLOSED
BOOST PUMP - OFF
FUEL TRANSFER PUMP - OFF
CROSSFEED - OFF
GENERATOR - OFF
FUEL CONTROL HEAT - OFF
PROP SYNC - OFF
ELECTRICAL LOAD - MONITOR