Garmin G1000 Pilot’s Guide for the Socata TBM 850/900
190-00709-05 Rev. D
56
FLIGHT INSTRUMENTS
2.1 FLIGHT INSTRUMENTS
AIRSPEED INDICATOR
NOTE:
Refer to the Pilot’s Operating Handbook (POH) for airspeed criteria and Vspeed values.
The Airspeed Indicator displays airspeed on a moving tape rolling number gauge. The numeric labels and
major tick marks on the moving tape are shown at intervals of 10 knots. The minor tick marks on the moving
tape are marked at intervals of five knots. Speed indication starts at 20 knots, with 60 knots of airspeed
viewable at any time. The indicated airspeed is displayed inside the black pointer. The pointer remains black
until reaching maximum operating speed (V
MO
), at which point it becomes red. For the TBM 850, the true
airspeed appears in knots below the Airspeed Indicator. For the TBM 900, the Mach number appears below
the Airspeed Indictor at or above Mach 0.3. The Mach number appears in a red background when the airspeed
enters V
MO.
Indicated
Airspeed
True Airspeed
(TBM 850 only)
Speed
Ranges
Airspeed
Trend
Vector
Vspeed
References
Figure 2-3 Airspeed Indicator
Mach Number
(TBM 900
only)
Figure 2-4 Overspeed Indications
Mach Number
during
Overspeed
(TBM 900
only)
A color-coded (white, green, and red/white barber pole) speed range strip is located on the moving tape. The
colors denote flaps operating range, normal operating range, and maximum operating speed (V
MO
). A red range
is also present for low speed awareness.
The Airspeed Trend Vector is a vertical magenta line that appears to the right of the color-coded speed range
strip when airspeed is either accelerating or decelerating. One end of the magenta line is anchored to the
tip of the airspeed pointer while the other end moves continuously up or down corresponding to the rate of
acceleration or deceleration. For any constant rate of acceleration or deceleration, the moving end of the line
shows approximately what the indicated airspeed value will be in six seconds. If the Airspeed Trend Vector
enters V
MO
, the indicated airspeed (and Mach number on the TBM 900) appear in yellow. The trend vector is
absent if the speed remains constant or if any data needed to calculate the trend vector is not available due to
a system failure.
