5.10.5. THE AUXILARY 8 (AUX 8) TRUE AIRSPEED PAGE
The AUX 8 page is used to determine the true airspeed (TAS) of the air-
craft.
To calculate the true airspeed (TAS):
1 Turn on the cursor (B).
2. Enter the aircraft’s calibrated air-
speed by using the right inner
knob (figure 5-75). If the calibrat-
ed airspeed isn’t known, use the
indicated airspeed. For most
aircraft the difference between
the calibrated airspeed and the
indicated airspeed is small at cruise airspeeds.
3. Use the right outer knob to move the cursor to the Prs field, and then
use the right inner knob to enter the aircraft’s pressure altitude. If the
pressure altitude was previously calculated on the AUX 6 page, or
entered on the AUX 7 page, it will already be displayed.
4. Move the cursor to the first Temp position, and then enter the outside
air temperature (degrees C) by using the right inner and outer knobs
(figure 5-76). The first digit of
the temperature is either “0” if
the temperature is above zero or
“-” if the temperature is below
zero. For maximum accuracy,
the total air temperature should
be entered. This is the tempera-
ture of air including the effect of heating due to the aircraft’s
movement through the air. The temperature read on a standard out-
side air temperature gauge found on most piston aircraft is “total air
temperature”. Since the difference between static air temperature and
the observed air temperature (or “total air temperature”) is usually
negligible, any temperature entered on the AUX 7 page is transferred
to this page. The true airspeed (TAS) is now displayed.
NOTE: If a compatible air data system is interfaced to the KLN 94, true
airspeed (TAS) is displayed directly on the AUX 20 page for the present
conditions.
KLN 94 Pilot’s Guide Chapter 5 Intermediate Operation
5-29
Figure 5-75
Figure 5-76
