TM 1-1510-225-10
3D-66
plan. A different groundspeed may be entered by
using the left outer knob to position the cursor over
each digit of the groundspeed and using the left inner
knob to select each individual digit.
If data is entered for FF and RES, as described
for the TRI 1 page, the fuel required for the trip is now
displayed. Fuel flow and reserve fuel entries made on
the TRI 5 page also input this same data on the TRI 1
and the TRI 3 pages.
4. Turn off the cursor function and then
select the TR I 6 page. The minimum ESA
and a listing of areas of special use
airspace of special use airspace wont fit
on one page, there will be multiple TRI 6
pages indicated by TRI+6. Refer to Figure
3D-95.
TRI+6
FP 7
ESA 13800FT
LUBBOCK
CL C
A-637
ALRT
Figure 3D-95. TRI 6 Page
3D-26. THE CALCULATOR PAGES.
The are seven calculator pages which may be
used to calculate a variety of information such as
pressure altitude and density altitude, true airspeed,
winds aloft, VNAV angle, and time zone conversions.
The calculator pages rely on manual inputs of air data
parameters even if the KLN 90B is interfaced with air
data sensors.
a. The Calculator 1 Page. The CAL 1 page is
used to determine pressure altitude and density
altitude.
1. Display the CAL 1 page on the left side.
2. Press the left CRSR button to turn on the
left cursor function.
3. Enter the altitude indicated on the aircraft
altimeter (IND) to the nearest hundred feet
by using the left outer knob to move the
cursor to the desired position and the left
inner knob to select each digit.
4. Use the left outer knob to move the cursor
to the first BARO position, and then enter
the current altimeter setting by using the
left inner and outer knobs. The pressure
altitude (PRS) is now displayed.
5. Use the left outer knob to move the cursor
to the first TEMP position, and then enter
the outside air temperature (in C) by
using the left inner and outer knobs. The
first digit of the temperature is either zero
if the temperature is above zero or a
minus () if the temperature is below zero.
For maximum accuracy, the static air
temperature should be entered. This is
the temperature of the air without the
effect of heating due to movement through
the air. The density altitude (DEN) is now
displayed as illustrated in Figure 3D-96.
6. Press the left CRSR button to turn off the
left cursor function.
CAL 1
ALTITUDE
IND:04000FT
BARO:29.84
PRS 4100FT
TEMP: 034o C
DEN 7100FT
Figure 3D-96. CAL 1 page
NOTE
If the AETMS is installed and interfaced to
the KLN 90B, the OTH 10 page displays
pressure altitude and density altitude for
the present conditions.
b. The Calculator 2 Page. The CAL 2 page is
used to determine TAS.
1. Select the CAL 2 page on the left side.
2. Press the left CRSR button to turn on the
cursor function.
3. Enter the aircrafts calibrated airspeed by
using the left inner and outer knobs. If