SECTION 5
PERFORMANCE
CESSNA
MODEL 182T NAV
Ill
SAMPLE PROBLEM
(Continued)
Wind component along runway
12 Knot Headwind
Field length
'3500
Feet
CRUISE CONDITIONS:
Total distance 450 Nautical Miles
Pressure altitude 7500 Feet
Temperature 16"
Expected wind
enroute
10 Knot Headwind
LANDING CONDITIONS:
Field pressure altitude 2000 Feet
Temperature 25°C
Field length 3000 Feet
TAKEOFF
The takeoff distance chart, Figure 5-5, should be consulted, keeping
in mind that distances shown are based on the short field technique.
Conservative distances can be established by reading the chart at
the next higher value of weight, altitude and temperature. For
example, in this particular sample problem, the takeoff distance
information presented for a weight of 3100 pounds, pressure altitude
of 2000 feet and a temperature of 30°C should be used and results
in the following:
Ground roll 1055 Feet
Total distance to clear a 50-foot obstacle 2035 Feet
These distances are well within the available takeoff field length.
However, a correction for the effect of wind may be made based on
Note 3 of the takeoff chart. The correction for a 12 knot headwind is:
12 Knots
X
10%
=
13% Decrease
9 Knots
This results in the following distances, corrected for wind:
Ground roll, zero wind 1055
Decrease in ground roll
-137
(1 055 feet
X
13%)
Corrected ground roll 91 8 Feet
5-4
U.S.
(Continued Next Page)
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