Piedmont Aviation News - Page 2
Friday..September Ik, 1945
A ON THE BACK
Vife reproduce a letter from Dr. James
E. Hemphill in order that you may
also bask in the simshino of its
praise,
"Dear Tom:
I have moved to Charlotte where I
am in practice with Dr. Shull.
I just wanted to express to you
and all the members of your organiza~
tion how much I enjoyed the privi~
1®8® of flying under their help and
your cooperation.
During the past several years, I
have been to numerous airports
throughout many of the southern and
eastern states, I CnN TRUTIiFULLY
SAY THhT hT no nIRPORT H.vVE I BEEN
SUO\m THE COURTESY OR CONSIDEIUTION
TH^T Vv'aS SHCTJN TO feiE DURING THE. PAST
YEAR IN V-JINSTON-nSALM. It would give
me great pleasure if you would let
your organization know how much 1
appreciated the things they did for
me.
Yours very truly,
James E. Hemphill ,M ,D .'
VffilGHT AND BALANCE
By F. H. Ponish
Did you have trouble in working
problem 3 in last week's issue? This
was no fault of yours, but was due to
a misprint. The distance A-B in this
problem should have read 125" instead
of 100". If you re-work the problem
using 125" ior the distance A-B, you
will receive the correct answer as
given.
So far we have dealt with some of
the theory leading up to the weight
and balance of an aircraft. Let us
now apijly what we have learned and
find the center of gravity location
of an aircraft. To accomplish this,
proceed as follows:
1, Ascertain the leveling means of
the aircraft in question by con
sulting the Aircraft Operation Record
(Form 309) or, if this form is not
available you may obtain the informa
tion from the pertinent Aircraft
Specifications,
2, Drain all fuel and oil tanks and
make certain that no baggage or equip
ment is left in the airplane which
should not be included in the aircraft
empty weight. Take the aircraft into
into a hangar and close all doors to
prevent draft from disturbing the
balance of the aircraft.
3, Place a platform scale of suffi
cient capacity under each front wheel
and under the tailwheel. Raise the
tail of the airplane by placing empty
boxes or barrels on the platform of
the tailwheel scale until the con
ditions specified by the leveling
means are satisfied. Instead of boxes
or barrel's a specially constructed
'jack may be used to raise the tail,
4, Measure the horizontal distance
between the front vi/heel axle and tail-
wheel -axle. This is the distance A-B
of the previous problems. To find it,
you suspend a plumb bob exactly midway
between the front wheels and in exact
line with the axles of the wheels.
Where the plumb bob touches the floor
you make a mark, (This mark is point
a). Next suspend a plumb bob from thu
center of the tailwheel axle, VJhere
the plumb bob touches the floor, make
another mark, (This mark is point B),
The distance between the two marks is
the horizontal distance between the
front wheel axle and tailwheel axle and
it is the same in length as the imagi
nary line A-B along the horizontal axis
of the plane. This measurement should
be made to the nearest I/8 of an inch.