2. The range (RANGE), which is the
distance in nautical miles that
could be flown based on the
endurance calculated above and
the present groundspeed.
3. The fuel efficiency, which is the
present fuel flow.
4. The desired fuel reserve (RES).
Same as displayed on the OTH 5
page. Changing the reserve on
one of the two pages also changes
it on the other page.
(c) OTH 7 Page. The OTH 7 page
displays rate of fuel flow as depicted in Figure 3-77.
ENG 1 301
ENG 2 295
Figure 3-77. OTH 7 Page
(d) OTH 8 Page. The OTH 8 page
displays the amount of fuel used as depicted in Figure
ENG 1 308
ENG 2 301
Figure 3-78. OTH 8 Page
(6) The Air Data Pages. When interfaced
with the AETM, the KLN 90B will display real time air
data parameters such as True Airspeed (TAS), Static
Air Temperature (SAT), Total Air Temperature (TAT),
Mach number, density altitude, and pressure altitude.
The KLN 90B will also calculate and display real time
wing data (magnitude and direction). The OTH 9 and
OTH 10 pages are used to display air data information.
Figure 3-79 depicts the OTH 9 page display.
These air data pages receive inputs from
air data sensors and display real time air
data information. They are independent of
the calculator pages that rely on manual
Figure 3-79. OTH 9 Page
(a) The TAS of the aircraft through the
surrounding air mass.
(b) MACH - the ratio of the true airspeed
to the speed of sound at a particular flight condition.
(c) The Tailwind (TLWND) component of
the wind, if applicable.
(d) The Headwind (HDWND) component
of the wind, if applicable.
(e) The Wind (WIND) direction relative to
true North and the wind speed.
(f) OTH 10 Page. The OTH 10 page
displays the following information.
1. SAT - the actual temperature of the
2. TAT - the air temperature including
heat rise due to compressibility.
This is the temperature measured
directly by the OAT probe.