Refer to figure or CAP 758 figure 2.20.
Given the following information for a SEPH, determine the fuel flow:
Manifold pressure: 24 in Hg
Refer to figure.
Determine the fuel flow at 2 000 ft, proceeding with one of the following manners:
Determine the fuel flow at 2 000 ft, proceeding with one of the following manners:
- Enter with Manifold Pressure 24 in Hg and move horizontally to the right until crossing the middle point between the SL and 4 000 ft pressure altitude curves.
- Continue vertically down and read the Fuel Flow at 2 000 ft: 89 lb/hr,
- Enter the graph from the left with Manifold Pressure 24 in Hg and move to the right intersecting both Sea Level and 4 000 ft lines.
- From the two intersections move vertically down to read Fuel flow at SL: 85.5 lb/hr and Fuel flow at 4 000 ft: 93 lb/hr.
- Find the average fuel flow interpolating for Fuel Flow at 2 000 ft: (85.5 lb/hr + 93 lb/hr)/2 = 89.25 lb/hr, close to 89 lb/hr
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