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When you paid for your fuel you noted on the
delivery ticket that it took 32 gallons to top the tanks.
You flew four hours and twenty minutes before
stopping for fuel. What was the average fuel con-
sumption? This time the rate arrow provides the
answer.
1. Set 4:20 on the inner scale (or 260 on the
middle scale) opposite of 32 on the outer
scale.
See
Figure 7.
2. The rate arrow indicates the average fuel
burn rate: 7.4 gallons per hour.
Remember that fuel consumption is greater during
the climb to altitude, so this average value does not
accurately reflect fuel consumption in cruising flight.
Figure 7
Try these examples:
(Answers are on Page 37)
GALLONS PER HOUR TIME TOTAL USED
1. 7.8 3:20
2. 4:50 62
3. 8.5 38
4. 10 2:30
5. 12 22