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16. GASOLINE CONSUMPTION. The two outer scales of Section A may also be used for this problem. Two of the following quantities are available for its solution: Total Gallons Used, Time, Rate of Consumption.

17. Example 6. Given: Time and Rate of Consumption

Required: Total Gallons Used

A pilot wishes to know how many gallons are necessary to fly 3 1/2 hours at an average rate of consumption of 95 gallons per hour.

(a) Set G. S. Index (1 hour) opposite 95 on outer scale.

(b) Opposite 3 1/2 hours (210 minutes) on inner scale read 330 gallons on outer scale.

18. Example 7. Given: Total Gallons and Rate of Consumption

Required: Time

A pilot has 230 gallons aboard. How long will it last at an average rate of consumption of 80 gallons per hour?

(a) Set G. S. Index (1 hour) opposite 80 on outer scale.

(b) Opposite 230 on outer scale read 173 minutes (2 hours 53 minutes) on inner scale.

Example 8: Given: Total Gallons Used and Time

Required: Rate of Consumption

After flying for 145 minutes (2 hours 25 minutes)a pilot notes that he has used 228 gallons of gasoline. What is the Rate of Consumption?

(a) Set 145 minutes on the inner scale opposite 228 gallons on the outer scale.        

(b) Opposite to the G. S. Index (1 hour) read the Rate of Consumption, 95 gallons per hour.

20. RATE OF ASCENT (or DESCENT). The two outer scales of Section A may also be used to solve this problem. Two of the following quantities are available for its solution: Total Elevation in Ascent (or Descent), Time, Rate of Ascent (or Descent).

21. Example 9. Given: Time and Rate of Descent

Required: Total Elevation in Descent