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BEECHCRAFT
Sundowner
180
Section VI
C23 (M-1285
and
After)
Wt
and
BaWquip
List
5. At the time of
weighing,
the airplane must be level
both longitudinally
and laterally. Longitudinally
and
laterally
level
attitude
is
determined
with
a level on the
baggage compartment
floor.
6. Measurement
of the
reaction
arms
for a wheel
weighing
is made
using
a steel
measuring
tape.
Measurements
are taken,
with
the airplane level on
the scales, from the reference
(a
plumb
bob dropped
from the centerline
of airplane at
F.S.
126.438, for-
ward
screw in spar access cov
r,
approximately
8 to
10 inches
forward of centerline drain hole) to the axie
centerline of the main gear and then to the nose wheel
axle centerline. The main wheel axle centerline
is
best
located
by stretching
a string across from one main
wheel to the other. All measurements
are to be taken
with
the tape level
with
the hangar floor and
parallel
to
the fuselage
centerline.
The locations of the wheel
reactions
will
be approximately
at Fuselage
Station
134.0
for main
wheels
and Fuselage
Station
58.5 for
A
the nose
wheel.
7. Jack
point
weighings
are accomplished
by
placing
scales
at the
jack
points
specified
in
step 1 above.
Since
the center of gravity of the airplane is forward of
Fuselage
Station
129.4,
the tail
reaction
of the
airplane
will
be
in
an
up
direction.
This can be
measured
on
regular
scales
by
placing
ballast
of
approximately
200 pounds
on the scales to which
the
aft
weighing
point is
attached by cable of
adjustable
length. The up reaction
will then be
total
ballast weight
minus
the
scale
reading
and
is
entered
in the weighing
form as a negative
quantity.
8.
Weighing
should always be made
in
an enclosed area
which
is
free from air
currents.The
scales
used
should
be
properly
calibrated
and
certified.
August, 1980
6-5
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