Piedmont Aviation Employee Newsletter /
Aug. 31, 1945, edition 1 /
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Piedmont Aviation Nows - Page 2,
Friday, August 31j 1945
simple as possible. At the end of each
lecture, there vvill be several problems
to vjork* If your answers to these ques~
tions do not agree with the ones given,
do not hesitate to ask me for additional
In addition to these short lectures
the ambitious student should also read
the chapter on "Force" in any High School
Physics book and page 104-115 of CAA
The basic principle of a "Weight and
Balance" is the law of balanced forces.
This law is best illustrated by an
example. In figure 1 below you see a
beam (A-B) resting on a balancing point
(F). At point A and B there is a v/eight
attached and Wo). If the product
obtained by multiplying the distance A-F
times Wi equals the product obtained by
by multiplying the distance B-F times
the beam vdll balance horizontally.
Let us now use actual values.
A 10" F 20"
1 (10 lb)
10 X 10 = 20 X 5
100 = 100
The distances A-F and B-F are called
arms. The product of weight times arm
is called moment. Be certain that you
understand the meaning of these two
By use of this principle we can cal
culate any missing quantity, if the
other three are given. Let us suppose'
that in figure 2 we know is 10 lbs..
Am A-F is 10" and W2 is 5 lbs. To find
Arm B-F we multiply Wi times Arm A-F and
divide this product by W2.
10 X 10
100 = 20
This is the correct answer for Arm B-F
in figure 2.
A-F =: 25", Wi 40 lbs., B-F c 50".
Find Wg. 20 lbs,
A-F = 4", W^ = 5 lbs., B-F = 2",
Find W2. iuis. 10 lbs.
Wi - 30 lbs.> B-F = 100", V/2 a
150 lbs. Find A-F. ^^^s. 500".
The V'/inston-Salem Journal, ^ugust 31st,
carried the following article, which is
of interest to all of us.
"GROAT TO GIVE FLIGHT TESTS
"Frank Groat, vice-president and chief
pilot of Piedmont Aviation, Inc., has
been authorized by the Civil Aeronautics
Authority to give private flight tests at
Smith Reynolds Airport, He was one of the
first flight examiners appointed outside
the CAA, which formerly gave all tests to
"Groat will be authorized to give all
tests for the private pilot’s license.
He may be reached at the local airport
for appointments to give flight tests or
written examinations at any time. CAA
inspectors will continue to make trips to
the airport here but applicants for
private pilot’s licenses need not wait
for the scheduled visits of examiners
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