BMS F-16C/D 4.34, Руководство по эксплуатации самолета

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T.O. BMS1F-16CM-1 BMS 4.34 Change 2.00
BMS 4.34 Dash 1
© Red Dog 2012-2019
Page: 132
1.9 ELECTRICAL SYSTEM
The real electrical system in the F-16 is extremely complicated with multiple AC and DC buses. BMS
has simplified things while maintaining correct behaviour for ramp starts, flight and shutdown but
without the possible malfunctions. Work on the electrical system is still in progress so hopefully; this
will get simpler in the future. But for now the BMS electrical system might be even harder to
understand than the real one.
The biggest difference is that BMS does not differentiate AC and DC power. The next difference is that
BMS does not model the actual physical routing for the bus wiring. For instance the real F-16 has
multiple essential & non-essential buses scattered in different locations, BMS only has one of each
electrical bus. Finally the real FLCS has a four branch power supply (ABDC) but BMS considers them
a single unit.
So basically what we have in BMS is a set of generators (MAIN GEN, STBY GEN, EPU GEN) that are
linked to engine output and hydrazine reserves. These feed models of the various electrical buses
(battery, emergency, essential and non-essential buses).
The MAIN GEN supplies power to the non-essential, essential and emergency buses.
The STBY GEN supplies power to the essential and emergency buses and comes online whenever
the MAIN GEN is not supplying power and as long as the MAIN PWR switch is in MAIN PWR.
The EPU GEN comes online when both the MAIN and STBY GEN fail, providing power to the
emergency buses.
1.9.1 Electrical System Normal Operation:
Prior to engine start the MAIN PWR switch is placed to BATT to permit a check of the aircraft battery.
The ELEC SYS, MAIN GEN, STBY GEN and FLCS RLY lights come on.
The FLCS RLY light illuminates because the FLCS relays are open and the FLCC is not connected to
the aircraft battery.
The FLCS PMG light is not illuminated since it requires FLCS power.
The ACFT BATT TO FLCS light does not illuminate since the FLCS relays are open.
With the FLCS PWR TEST switch held in TEST the FLCS relays close but do not latch.
The FLCS PMG and the ACFT BATT TO FLCS lights illuminate and the FLCS RLY light goes off.
The FLCS PWR lights on the TEST switch panel illuminate, indicating that the power output of the
FLCC is good. With the FLCS PWR TEST switch in NORM and the MAIN PWR switch moved from
BATT to MAIN PWR the lights do not change.
When the JFS switch is moved to either START position the FLCS PMG light (and the ACFT BATT TO
FLCS light if the engine is started on battery power) illuminates and the FLCS RLY light goes off,
indicating that the FLCS relays have closed.
During engine start the FLCS PMG light (and ACFT BATT TO FLCS light if the engine is started on
battery power) goes off at approximately 30% engine rpm.
The STBY GEN light goes off at approximately 60% engine rpm.
The MAIN GEN light goes off approximately 5-10 seconds later if both generators are operating
normally.
At any point after selecting MAIN PWR, including in flight, the FLCS PWR TEST switch may be held
momentarily in TEST to check FLCC power output. During the EPU test the FLCS PWR lights come
on to indicate that EPU PMG power is available to the FLCS.
During engine shutdown the ELEC SYS caution light and FLCS PMG, MAIN GEN, and STBY GEN
lights come on as the engine spools down. The ACFT BATT TO FLCS light also illuminates.