PRIMUSr 1000 Integrated Avionics System
A28--1146--112--00
Modes of Operation
8-28
180
160
220
240
7500
8500
2020
1010
1010
2020
3030
3030
3
2
1
0
1
2
3
200
80
00
200
HDG VS
29.92 IN
090
CRS
VOR2
15.0
HDG
360
VOR2
NM
KTS
GSPD
225
YD
M
1000
20
80
1000
AP
ASEL
AD--50994--R3@
Vertical Speed Hold Mode PFD
Figure 8--22
SPEED HOLD MODE
The speed (SPD) hold mode is engagedbypushing the SPD button on
the GC. The indicated airspeed (IAS)/Mach reference is synchronized
to the IAS/Mach being flown when the mode is engaged. When a new
reference is manually selected using the GC SPD knob, the system
automatically flies the new reference.
The IAS/Mach speed target comes from the coupled side PFD.
Depending on whether the reference is identifiedas IASor Mach(input
from the controller), the system flies IAS or the Mach reference.
Switching from IAS to Mach (or Mach to IAS) does not move the
reference, but simply changes the units used on the digital readout on
the PFD. No aircraft maneuvering changes occur when units of
measure are switched. Push the SPD knob on the GC to switch
between the IAS and Mach modes.
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