Pitch And Roll Trim Adjustments Criteria - Honeywell Primus 880 Pilot's Manual

PRIMUSr 880 Digital Weather Radar System
Trim Adjustment
Roll offset
Pitch offset
Roll gain
Pitch gain
Generally, it is recommended to perform trim adjustments only if
noticeable effects are being observed.

Pitch and Roll Trim Adjustments Criteria

NOTES: 1. Depending on the installation, not all of the
adjustments shown in table 5- 4 are available. If STAB
TRIM ENABLE programming strap is open, only the
roll offset adjustment is available. If STAB TRIM
ENABLE is grounded, all four adjustments are
available. Consult the installation configuration
information for details.
2. After any adjustment procedure is completed, monitor
the ground returns displayed by the radar during
several pitch and roll maneuvers. Verify that the
ground returns stay somewhat constant during
changes in aircraft orientations. If not, repeat the
adjustment procedure.
3. After the trim adjustment feature is selected, more
than one adjustment can be made. They are available
in the sequence shown in table 5- 4, and can be done
in the sequence of first finishing one adjustment, then
proceeding to do the next by pushing the STAB button.
Radar Facts
5-20
Flight Condition
Straight and level
Straight and level
Constant roll angle
>20°
Constant pitch angle
>5°
Table 5- 4
Effect On Ground
Return Display
(Over Level
Terrain)
Nonsymmetrical
display
Ground displays do
not follow contour of
range arcs.
Nonsymmetrical
display
Ground displays do
not follow contour of
range arcs.
A28- 1146- 102- 00