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A pilot is descending at the rate of 300 feet per minute. What will be his loss of altitude after descending for 34 minutes?

(a) Set “Unit Index” at 10 on the smaller disc opposite 30 (=300) on the larger disc.

(b) Opposite 34 on the small disc read 10,200 feet on the larger disc.

22. Example 10. 

Given: Time and Total Elevation in Ascent
Required: Rate of Ascent

A pilot climbs 6900 feet in 15 minutes. What is his rate of ascent?

(a) Set 15 on the smaller disc opposite 6900 on larger disc.

(b) Opposite Unit Index above 10 on smaller disc read Rate of Ascent, 460 feet per minute.

23. Example 11. 

Given: Rate of Ascent and Total Elevation in Ascent
Required: Time

A pilot climbs to 7400 feet above his starting point at the average rate of 500 feet per minute. How long will this require?

(a) Set the Unit Index above 10 on the smaller disc opposite 500 on the outer disc. Opposite 7400 on the outer disc, read the Time, 14.8 minutes, on the smaller disc. 

24. DISTANCE IN 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: Distance Time, Speed. The method used in Example 2, 3 and 4 should be used.

25. Example 12. 

Given: Speed and Time
Required: Distance

The pilot in Example 11 wishes to know how far he will have traveled when his climb is finished. His average True Air Speed is 120 miles per hour, and he is aided by a tail wind of 20 miles per hour. 

(a) Set G. S. Index to 140 miles per hour (120+20).

(b) Opposite 14.8 minutes on the smaller disc, read 34.5 miles on the larger disc.