Fuel Required - Cessna 172R Operating Handbook

SECTION 5
PERFORMANCE
FUEL
REQUIRED
The total fuel requirement for the flight may be estimated using
the performance information in Figure 5-7 and Figure
sample problem, Figure 5-7 shows that a climb from 2000 feet
6000 feet requires 1 .4 gallons of fuel. The corresponding distance
during the climb is 10 nautical miles. These values
standard temperature and are sufficiently accurate for most flight
planning purposes. However, a further correction for the effect of
temperature may be
approximate effect
time, fuel, and distance by 10% for each 10°C above standard
temperature, due to the lower rate of climb. In
temperature 16°C above standard (28°C - 12°C), the correction
would be:
16°C
10°C
■With this
factor included, the fuel estimate would be calculated as
follows:
Fuel to climb,
Increase due
Corrected fuel to climb
Using a similar procedure for the distance to climb results in 12
nautical miles. (10 nm using chart + 1.2 nm
than standard temperature
5-6
made as noted on the climb chart. The
a non-standard
of
x
16% Increase
10%
=
standard temperature
non-standard temperature
to
X
(1.4 16%)
= 11.2 nm.
temperature is to increase the
this case, assuming a
to correct
Rounded up
to 12 nm.)
CESSNA
MODEL 172R
For this
5-8.
to
are for a
1.4
0.2
1 .6 Gallons
for higher
Revision 7