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23
Figure 16
ground speed will indicate 450 feet per minute,
while a jet following that same gradient at 240 knots
ground speed will show a vertical speed of 1,200
feet per minute.
You can convert feet per mile to feet per minute
by placing the rate arrow opposite to the ground
speed, finding the feet per minute value on the outer
scale lined up with the feet per mile value on the
middle scale. Try these two examples:
1. Set the rate arrow opposite of 90.
2. Find 300 feet per mile on the middle scale
(
see
Figure 16).
3. The climb rate in feet per minute, 450, is
found on the outer scale opposite of 300.
1. Set the rate arrow at 240 knots.
2. Look above 300 on the middle scale.
3. You should find a vertical speed of 1,200 feet
per minute.