Arrow PA-28R-201 Pilot's Operating Handbook And Faa Approved Airplane Flight Manual page 150

PIPER AIRCRAFT CORPORATION
PA-28R-201, ARROW
SECTION 6
WEIGHT AND BALANCE
6.9 INSTRUCTIONS FOR USING THE WEIGHT AND BALANCE
PLOTTER
This plotter is provided to enable the pilot quickly and conveniently to:
(a) Determine the total weight and C.G. position.
(b) Decide how
to
change the load
if
the first loading is not within the
allowable envelope.
Heat can warp or ruin the plotter if it is left in" the sunlight. Replacement
plotters may be purchased from Piper dealers and distributors.
The "Basic Empty Weight and Center of Gravity" location is taken from
the Weight and Balance Data Form (Figure 6-5), the Weight and Balance
Record (Figure 6-7), or the latest FAA major repair or alteration form.
The plotter enables the user to add weights and corresponding moments
graphically. The effect of adding or disposing of useful load can easily be
seen. The plotter does not cover the situation where cargo is loaded in
locations other than on the seats of in the baggage compartments.
To use the plotter, first plot a point on the grid to locate the basic weight
and C.G. location. This can be put on more or less permanently because it will
not change until the airplane is modified. Next, position the zero weight end of
anyone of the loading slots over this point. Using a pencil, draw a line along
the slot to the weight which will be carried in that location. Then position the
zero weight end of the next slot over the end of this line and draw another line
representing the weight which will be located in this second position. When all
the loads, except fuel, have been drawn in this manner, the end of the
segmented line locates the load and the C.G. position of the airplane for zero
fuel weight. If this point is not within the allowable envelope, it will be
necessary to remove baggage or passengers, and/or to rearrange baggage and
passengers to get the point
to
fall within the envelope.
Position the zero fuel weight end of the fuel slot over this point and draw a
line representing fuel load. The end of the segmented line locates the load
and C.G. position of the airplane for Ramp Weight. If this is not within the
allowable envelope, it will be necessary to remove fuel, baggage, or
passengers and/or rearrange baggage and passengers to get this final point
LO
fall within the envelope.
Fuel allowance for engine start, taxi, and runup is 8 pounds.
Subtract the Estimated Fuel Burnoff from the Takeoff Weight to
determine the Landing Weight C.G.
Gear movement does not significantly affect the center of gravity.
ISSUED: NOVEMBER 8, 1989
REPORT: VB-1365I
6-13