Refer to figure or CAP758 Figure 3.14.
Given the following information, determine the AEO fuel consumption:
Cruise pressure altitude: 14 000 ft
OAT: -13°C
Mass: 8 000 kg
Refer to figure.
1. The figure 3.14 at the top left corner refers to ISA, thus the density altitude must be determined:
- The ISA temperature at 14 000 ft is: +15°C - (2°C x 14 000ft/1000) = -13°C.
- The ISA deviation is: OAT - ISA temp. at 14 000 ft = -13°C - (-13°C) = 0°C.
- Thus, the density altitude is equal to the Pressure altitude 14 000 ft.
2. Two-engine hourly fuel consumption:
- Enter with the density altitude 14 000 ft and move horizontally to the right until crossing the 8 000 kg mass line.
- Continue vertically down and read the hourly fuel consumption: 375 kg/hr, 468 l/hr, 823 lb/hr, 124 USG/hr.
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