TM 1-1510-262-10
(2) Purpose. This graph is used to determine laps down landing distance, given free air temperature in
degrees Celsius, ield pressure altitude, runway gradient in % up or down, and head or tail wind component in
knots. The wind grids include factors of 50% for headwinds and 150% for tailwinds. Components of reported winds
may therefore be used directly in the grids. Weight does not signiicantly affect landing distance.
bi. Landing Distance - Flaps Up.
(1)
Description. The Landing Distance - Flaps Up graph (Fig. 7-97) depicts landing distance with laps up.
(2) Purpose. This graph is used to determine laps up landing distance, given laps down landing distance.
Landing with laps full down is normal procedure. Flaps up landings may produce tire speeds and/or brake energies
that exceed limitation. To determine the laps-up landing distance, read from the Normal Landing Distance - Flaps
Down graph, the landing distance appropriate to temperature, altitude, runway gradient, and wind. Enter the
subject graph with the derived value, and read the laps-up landing distance.
bj. Landing Distance-One Engine Inoperative - Flaps Down.
(1) Description. The Landing Distance-One Engine Inoperative - Flaps Down graph (Fig. 7-98) depicts
one engine inoperative landing distance.
(2) Purpose. This graph is used to determine one engine inoperative laps down landing distance, given
the laps down normal landing distance. To determine the one engine inoperative landing distance, read from the
Normal Landing Distance - Flaps Down graph, the landing distance appropriate to temperature, altitude, runway
gradient, and wind. Enter the subject graph with the derived value, and read the one engine inoperative landing
distance.
7-4. EXAMPLES.
The following examples present calculations for light time, block speed, and fuel required for a proposed light from
Billings, Montana, to Casper, Wyoming, at light level 250, using the conditions listed below, except as noted. The
desired takeoff weight is 16,000 pounds, if possible.
a. Conditions. At Billings-Logan International (BIL):
Free Air Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59F
Field Elevation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3649 feet 1
Altimeter Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30.07 in. Hg
Wind . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290 at 15 knots
Runway 34 Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5585 feet 1
Gradient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.9% downhilll 1
1 Source: DOD TERM USLIAAPV01, 9 JAN 92.
Route of Trip: BIL - V19 - CPR
Route Segment Data: Table 7-1.
At Natrona County International (CPR):
Free Air Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 F
Field Elevation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5348 feet 4
Altimeter Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29.27 in. Hg
Wind . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330 at 10 knots
Runway 30 Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8686 feet 4
Gradient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3% up 4
4 Source: DOD TERM USLIAPV03, 9 JAN 92.
7-12
