E6B Flight Computer - Chase-durer Falcon Command Operation Manual

You can probably guess how many, because 15 miles in 2.5 hours is obviously too little and 1500 is
obviously too much. So the answer must be 150 miles.
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Let's try another example:
Again, you're going down the freeway at 70 miles-per-hour. You've been traveling at that speed for
110 minutes. How far have you traveled?
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Solution:
Turn the bezel so that the numeral 60 (which represents 60 minutes) on the bezel is right above the
number 70 (which represents 70 miles-per-sixty minutes). Now find the numeral 11 on the bezel and
look directly below it on the face. You will note that the 11 is between the numerals 12 and 13 on the
face. We must now interpolate. First we must decide whether the numerals 12 and 13 on the face
represent 12 and 13, 120 and 130, 1200 and 1300, etc. It's obvious that 12 is too little and 1200 is
too big, but sometimes it's not so obvious. So here's another method.
MP H
CHASE-DURER
12 12
10 2
8
9 3
8 4
6
6 6
FALCON
COMMAND
60
50 10
40 20
30

E6B Flight Computer

At 70 miles-per-hour (70 miles in 60 minutes), you would
have to travel over 14 hours to go further than 1000 miles.
14 hours is 840 minutes. So the answer must have more
than 2 and less than 4 digits. In other words, it must
have 3 digits until you get above 14 hours or 840 minutes.
10
2
mental/estimates will become second nature (i.e. intuitive).
4
Now that we've done the mental calculation, we know that
the answer must have 3 digits. Therefore 12 must
31
represent the number 120 and 13 must represent the
number 130. Since there are nine ticks between the 12 and
13, there are ten divisions between them. Since they
represent the difference between the numbers 120 and
130, which is 10, each tick must represent 1. Since the
numeral 11 on the bezel is above the eighth tick after
After using the Flight Computer for a while these
10.