3. B. (8) (g)
Honeywell
altitude. The G limiter
acceleration is held to
MAINTENANCE
MANUAL
GULFSTREAMIV
acts to ensure
a maximum of 8
that the rate of
ft/sec2.
After the G limiter, the altitude error signal is summed with
washed out pitch attitude.
Long term pitch attitude is washed
out so that the aircraft will maintain the pilot desired
altitude.
From the summing junction, the ASEL or VASEL CMD
signal is filtered,
rate limited and summed with IVV
(instantaneous vertical velocity).
IVV is a combination of vertical (normal) acceleration and
altitude rate. This signal is used as a damping term and is
summed with the ASEL or VASEL CMD signal to enhance the
smoothness of the flare maneuver.
The aircraft will remain in
the ASEL or VASEL capture mode until the following conditions
exist simultaneously:
● ASEL or VASEL CAP
● ALT error is less than 25 feet
. ALT rate is less than 5 ft/sec
At this time, the ASEL or VASEL mode is dropped and the
aircraft is automatically placed in the altitude hold mode.
After being summed with IVV, the ASEL or VASEL CMD
signal is
TAS gain programmed and routed to Figure 260, sheet 7, and is
processed as discussed
in paragraph 3.B.(8)(i).
Glideslope (APP) Mode (See Figure 260, sheet 6.) The glideslope
mode is used for the automatic intercept, capture and tracking
of the glideslope beam.
The
beam is used to guide the aircraft
down to the runway in a linear descent. Typical glideslope
beam angles vary between 2 and 3 degrees, dependent on local
terrain.
When the glideslope mode is used as the vertical
portion of the localizer approach mode, it allows the pilot to
fly a fully coupled ILS approach. The mode is interlocked, so
that glideslope capture is inhibited until localizer capture
has occurred as previously discussed in paragraph 3.B.(7)(c).
The glideslope mode is set up and flown as follows:
. The navigation receiver is tuned to the published ILS
frequency for the runway in use.
● The course pointer and heading bug are set on the PFD for
localizer intercept.
● The APR mode is selected on the GP-820 Flight Guidance
Controller.
● The NAV/ILS navigation source is selected on the DC-884
Display Controller.
22-14-00
Page 298.117
Apr 15/93
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