Cessna 152 1978 - Fuel Required

CESSNA AIRCRAFT COMPANY FOR TRAINING USE ONLY
MODEL 152 5-5
The range figure of 375 nautical miles is corrected to account for the expected 10 knot headwind at
5500 feet.
Range, zero wind 375
Decrease in range due to wind (3.9 hours × 10 knot headwind) 39
Corrected range 336 Nautical Miles
This indicates that the trip can be made without a fuel stop using approximately 65% power.
The cruise performance chart, figure 5-7, is entered at 6000 feet altitude and 20°C above standard
temperature. These values most nearly correspond to the planned altitude and expected temperature
conditions. The engine speed chosen is 2400 RPM, which results in the following:
Power 64%
True airspeed 99 Knots
Cruise fuel flow 5.2 GPH
The power computer may be used to determine power and fuel consumption more accurately during
the flight.
FUEL REQUIRED
The total fuel required for the flight may be estimated using the performance information in figures 5-6
and 5-7. For this sample problem, figure 5-6 shows that a climb from 2000 feet to 6000 feet requires 1
gallon of fuel. The corresponding distance during the climb is 9 nautical miles. These values are for a
standard temperature (as shown on the climb chart) and are sufficiently accurate for most flight
planning purposes. However, a further correction for the effect of temperature may be made as noted
on the climb chart. The approximate effect of a non-standard temperature is to increase the time, fuel
and distance by 10% for each 10°C above standard temperature, due to the lower rate of climb. In this
case, assuming a temperature 16°C above standard, the correction would be:
16°
10°
× 10% = 16% 
With this factor included, the fuel estimate would be calculated as follows:
Fuel to climb, standard temperature 1.0
Increase due to non-standard temperature (1.0 × 16%) 0.2
Corrected fuel to climb 1.2 Gallons
Using a similar procedure for the distance to climb results in 10 nautical miles.
The resultant cruise distance is:
Total distance 320
Climb distance -10
Cruise distance 310 Nautical Miles