Cessna 172 R - GROUND ROLL AND TAKE-OFF

Supplement POH Cessna 172 R&S
Page 5-2
Issue 3
Revision -, June 2016
GROUND ROLL AND TAKE-OFF
The ground roll and take-off distance chart, Figure 5-1c (Takeoff
Distance), 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, temperature and altitude. For example,
in this particular sample problem, the takeoff distance
information presented for a weight of 1111 kg, pressure altitude
of 2000 ft and a temperature of 30°C should be used and results
in the following:
Ground Roll........................................................357 m (1171 ft)
Total Distance to clear a 15 m obstacle..............690m (2265 ft)
These distances are well within the available takeoff field length.
However, a correction for the effect of wind may be made based
on Note 2 of the takeoff chart. The correction for a 12 Knot
Headwind is:
This results in the following distances, corrected for wind:
Ground Roll, zero wind .......................................357 m(1171 ft)
Decrease at 12 Knot Headwind (357m x 13%) = ....- 46 m (152 ft)
Corrected Ground Roll.................................. 311 m (1019 ft)
Total Distance to clear a 15 m obstacle,
zero wind.......................................................... 690 m (2265 ft)
Decrease at 12 Knot Headwind (690m x 13%) = . - 90 m (294 ft)
Corrected Total Distance to clear a ................ 600m (1971 ft)
15 m obstacle
12 Kt
x 10 % = 13 % (Decrease)
9 Kt