SECTION 5
PERFORMANCE
CESSNA
MODEL 172R (180 HP)
CRUISE CONDITIONS:
Total distance
Pressure altitude
Temperature
Expected wind enroute
LANDING CONDITIONS:
Field pressure altitude
Temperature
Field length
360 Nautical Miles
7500 Feet
16
°
C (16
°
C Above Standard)
10 Knot Headwind
2000 Feet
25
°
C
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 2550 pounds,
pressure altitude of 2000 feet and a temperature of 30
°
C should be
used and results in the following:
Ground roll
1285 Feet
Total distance to clear a 50-foot obstacle 2190 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:
5-4
Ground roll, zero wind
Decrease in ground roll
(1285 feet X 13%)
Corrected ground roll
1285
-167
1118 Feet
Nov 24/99
Summary of Contents for 172R180HP
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