WEIGHT AND BALANCE
To determine the aircraft's CG location and to verify that the CG falls within
the predetermined CG travel range, it is necessary to use the chart in the
following page. Chart reports CG location as a function of the empty weight
moment with respect to the datum as yielded by weighing report.
USE OF “WEIGHT & BALANCE” CHART (page 6-6)
In order to use the graph it is necessary to know the value of the moment arm
with respect to the datum. Once this value is found on the abscissa, a parallel to
the oblique lines is drawn until it intersects the ordinate relative to the weight
of pilot and passenger. From this point, a new line is drawn horizontally up to
limit value of 180 kg and, from here, a parallel to the oblique lines is drawn
until it intersects with the abscissa relative to fuel weight carried on board. A
horizontal line is then drawn through this point up to limit value of 70 liters
and a new parallel to the oblique lines is drawn until abscissa is intercepted
relative to baggage loaded on board behind the seats. Another horizontal line is
drawn and it is thus possible to verify that the intersection of this segment with
the vertical abscissa relative to the aircraft's takeoff total weight falls within the
shaded area which represents the admissible CG range as a function of total
weight.
Pages 6 and 7 show charts of CG travel as a function of aircraft weight,
distances in meters of pilots and baggage from datum (propeller support
flange) is also provided.
EXAMPLE (see page 6-6)
Empty weight moment = 562 kg
m
Pilot and passenger = 160 kg
Fuel = 50 Lit
Baggage = 15 kg
Takeoff weight = 536 kg
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