Fuel Required - Rotax CESSNA 150 Manual

Airplane Flight
Manual Cessna F150L
Nr. 160
Converted with kit 5-4
NS402S with ROTAX 912 S3 and Page:
HOFFMANN HO-V352F/170FQ+10 Revision 1

FUEL REQUIRED

The total fuel requirement for the flight may be estimated using the performance information in
figures Fig. 5 - 5 to Fig. 5 - 9 . For this sample problem it can be seen from Fig. 5 - 8 that a
climb from 1500ft to 5500ft requires 4.1ltr. of fuel. Normal taxi and warm up will need
approximately 4 liters of fuel. The distance travelled is approximately 9.5 NM as seen from Fig.
5 - 7 .
With these values the fuel required for cruise and for whole flight can be determined
Distance in cruise phase ........ 260NM – 9.5NM = 250NM
Time req. for cruise ................ 250NM / 74kts = 3.4Std.
Fuel required ......................... 3.4 hours. * 17.4ltr/h = 59ltr.
The total calculated, expected fuel consumption is calculated as follows:
Start warn up and taxi ................... 4.0ltr.
Climb ............................................ 4.1ltr.
Enroute...................................... 59.0 ltr.
Total .......................................... 67.1 ltr.
Therefore, an extra fuel of 85ltr. – 67.1ltr. = 17.9ltr. is available
Once the flight is underway, ground speed checks will provide a more accurate basis for
estimating the time enroute and the corresponding fuel required to complete the trip with ample
reserve.
LANDING
• Pressure altitude ............................................ 2000ft
• Temperature ................................................... 25°C
• Field length ..................................................... 914m
A procedure similar to take-off should be used for estimating the landing distance at the
destination airport. Fig. 5 - 10 presents landing distances for various airport altitude and
temperature combinations Field pressure altitude 2500ft and temperature of 25°C correspond
to following values.
Deviation from. ISA ...................... +16°C
Ground roll .................................. 143m + (16°C/33°C) *0.1*143m = 150m
total dist. to clear 15m obst. ......... 346m + (16°C/33°C) *0.1*346m = 363m
A correction for the effect of wind may be made based on note of the landing chart using the
same procedure as outlined for take-off