Hawker Beechcraft Hawker 800XP, Руководство по эксплуатации для пилотов

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Page 2-32
Pilot’s Operating Manual
Revision A1: Nov, 2002
Sub-section 2
ENGINES
Hawker 800XP Pro Line 21
Section III - SYSTEMS DESCRIPTION
Engine Synchronizer
The engine synchronizer provides synchronization of the engines. Using the three position ENG SYNC
switch, synchronization of either the low pressure fan N
1
or the high pressure turbine N
2
speeds can be
selected in the cockpit.
The left engine (No. 1) is the master engine and the right engine (No. 2) is the slave. The system
compares either the N
1
or N
2
speeds of the engines. The synchronizer processes speed signals from
each engine and provide a trim signal to the electronic engine computer of the slave engine to reduce
any speed difference.
Synchronization has limited authority and can occur only when speed differential is within the authority
range. The maximum authority range is 2.5% N
2
at thrust setting midrange; authority range decreases
as engine speed increases or decreases from the thrust setting midrange. The synchronizer has no
effect at the full thrust settings.
The OFF position of the switch removes the DC power from the synchronizer; the N
1
and N
2
positions
select the spool that will be used for synchronization. Operation of the synchronizer requires both
engine computer switches to be in the AUTO positions.
With APR armed the synchronizer is inoperative. When a synchronizer is switched off, the N
1
RPM
indication displays N
1
RPM compensated for the thrust of the engine.
When the synchronizer is switched to N
1
or N
2
, the N
1
RPM indication displays true N
1
RPM.
Power Supply
The engine synchronizer system uses 28 VDC from the PS1 busbar.
ENG SYNC
N1
N2
OFF
Overhead Roof Panel