Piper PA 28-181 Manual page 91

SECfiON 6 PIPER AIRCRAfT CORPORATION
WEIGHT AND BALANCE PA.28.I8I, ARCHER II
SAMPLE PROBLEM
A sanple problem will demonstralc thc use of the weight and bälance
plo!1er
Assume a basic weighr änd C.G. location of 1300 pounds al85.00 inches
respectively. We wish to carry a pilot and 3 passengers. Two mcn wcighing
180 and 200 pounds will occupy the fronr sea1s, and lwo children weighing
80 and 100 pounds will ridc in the rcär. Two suitcases weighing 25 pounds
and 20 pounds respeclively, will be canicd in the reäJ comparfinent- We
wish !o carry:18 gällons of fuel. Wi[ we be wirhin üe safc cnvelope?
r
(ä) Place a dot on the plotrcr grid ar 1300 pounds and 85.00 inches to
I
represent the basic airpiane. (See illustrarion Figure 6-17.)
(b) Slidc üe slotted plastic into posidon so that üe dot is under rhe slor
for Lhe forwärd seäts, at zero weigh!.
(c) Draw a line up lhe slot to the 380 pound posirion (180 + 2m) aid pu!
a do!.
(d) Conlinuc moving the plastic and plolling poinrs to account for
weight in lhc rcar seaß (80 + i00), baggage comparrmenr (15), and
fuel lanks (288).
(e) As can bc scen from rhe illustrarion, lhc l-rnal dor shows the roral
weighr 1o be 2193 pounds wirh rhe C.c. a! 89.4,1. This is weil wirhin
oe envclope.
As fuel is bumed off,lhe weigh! and C.c. will follow down the fuel line
and stay wilhin the covclope for landing.
REPORT: VB-1120
6-l2b
ISSUED; MAY 29, 1980
REVISED: t'EBRUARY 2, 1990