Piedmont Aviation Employee Newsletter /
Oct. 12, 1945, edition 1 /
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Piednont A-yjation Hews - Pago 2
Friday/, October 12, 1945
YiTritten oxamination for private liccnso
will bo givon at any timo by any Instruc
tor at our Operations Office. This oxam-
ination is to bo given before your origi
nal solo X C.
As you vrill have noticed from the stub
of your pay check, the prJiaiuiTis for the
hospitalization insurance have been paid
and yoiJir policy vd.ll bo in full effect
November 15th« We are hoping you will
never have to use it»
Saturday, October 13th, vto are going to
have a large number of out-of-toivn visi
tors at the airport. Mr. Ponish urges
everyone to be as neatly dressed as pos
sible and to have the shops and hangars
Aviation vocabulary vfill b© resumed next
WEIGHT AI'ID BAL.\NCE
By F. H. Ponish
So far, wo have only dealt with the CG
location of the empty airplane. VJhen the
plane is loaded vvith pilot, passengers,
baggage, fuel and oil, the CG location
mil move for^vard or aft of the empty CG
location. To insure safe flying conditions
the CAA gives in the pertinent aircraft
specification and the Operation Record of
the plane (Form 309) the forvrard and aft
limits that the CG is permitted to neve,
liidor no condition must these limits bo
exceeded. In the aircraft specification
and the operation record, there is also
listed the maximuni alloi’/able gross weight
(weight vjhen the airplane is fully loaded)
This weight must never bo oxceoded.
Tfo shall no’tT consider the loading of ar.
airplane in such a manner as to arrive a '
the location of the CG in its extreme
forward position. This is called the "CG
forward extreme". Remember cjiy added
vreight, fonrard of the empty CG location^,
vd.ll make the airplane nose heavy and
any weightadded, aft of the empty CG
location, will make the airplane tail
The vroights as given in Part 04 are
used in all calculations of CG forvmrd
and aft extremes.
Fuel 6 lbs. Persons 170 lbs.
Oil 7.5 " Parachutes 20 "
For your convenience you %Till find repro
duced below the aircraft specifications
of a Piper Cub JS C-65 which are perti
nent to the calculations involved:
CG Range / 10,6 to / 22.6
Standard weight 1100 lbs.
No. Seats 2 (one at / 9 and one at /Sd)
Baggage 20 lbs / 49
Fuel capacity 12 gals. (-18)
Oil capacity 1 gal. (-29)
Lot us now find the CG Forv/ard Extreme
of a J3 C-65 which has an empty weight
of 650 lbs. and empty CG location 16#
Arrange your vfork as before:
¥ft. Arm Moment
(lbs.) (in.) (in,lbs.)
A m 650 16 10400
Now consider that in order to find the
CG Fon’mrd Extreme the airplane must bo
loaded ivith only those items -wrfiich tend
to move the CG fonrard.
It is obvious that the plane will have
to be occupied by a pilot. According to
the aircraft specifications a J3 C-65
is licensed for t\To seatsp one at / 9 anc
the other at / 36. The ¥/oight of a person
occupying the seat at / 9 v/ill tend to
move the CG forward. Ho^vevor, the spoci-
(fications require that a J3 C-65 bo
flovm solo from the rear seat. It follows
Piedmont Aviation Employee Newsletter
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Oct. 12, 1945, edition 1
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