PRIMUS
r
1000 Integrated Avionics System
A28--1146--112--00
4-47
Electronic Flight Instrument System (EFIS)
When the FGS enters the MAX SPEED mode, the annunciator MAX
SPEED is displayed in amber to the left of the ADI.
D
Takeoff V
SPEED
Display
-- If the aircraft is on the ground V
1
, V
R
, and
V
2
are displayed in digital tabular form inside the lower portion of the
airspeed tape. As the airspeed tape increases and the values come
into view on the airspeed tape, the tabular display is removed and
subsequently replaced by the appropriately positioned V
SPEED
bug.
D
Indicated Airspeed Comparison Monitor
-- If the on--side and
cross--side calibrated airspeed differ by 5 knots or more for greater
than 2 seconds, an amber IAS is displayed vertically near the top of
the airspeed tape. When initially activiated, the display flashes for
ten seconds, then goes on steadily.
D
Mach Display
-- The digital Mach speed display is of the present
Mach number and is shown below the airspeed tape. The color of
the digits always agrees with the digital airspeed display. Mach
speed is displayed when the airspeed increases beyond 0.45M and
is removed when airspeed drops below 0.40M.
D
Airspeed Rolling Digit Display
-- A rolling digit display of the actual
current IAS value is contained within the display window. This data
is a magnification of the digits on the scale and they are readable to
a one--knot resolution. The digits within the pointer are green. When
the current airspeed value is equal to or exceeds the maximum
allowable airspeed (V
MO
) the digits turn red. When the airspeed trend
vector exceeds V
mo
by one knot, the rolling digits turn amber unless
red is required.
D
Low Speed Awareness (LSA)
-- LSA (not shown) is indicated by
the three segment bar on the lower right side of the airspeed tape.
The bar indicates angle of attack (AOA) relative to V
s
. The reference
for the bar is the airspeed reference line. The top of each segment
is defined in table 4--16.
Segment
V
S
Reference (V
SO
)
White
1.23
Amber
1.13
Red
1.0
Low Speed Awareness Color Logic
Table 4--16
