ASA Electronics cx-3 - W;B (E6-B FUNCTIONS); WEIGHT AND BALANCE

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does not affect the arms or weights involved
in the calculation. An RF of 100 means each
moment is divided by 100 before the calculator
displays it or the operator enters it; this will be
taken into account when the total and CG are
computed. RF of 1 means the moment entries
will be taken at face value.
2. Press and tap enter to set 1 as the
reduction factor.
3. Slide to ITEM 1, tap enter. Input the information
for the rst item.
Press and tap enter for aircraft
weight, then and tap
enter for the aircraft moment. This results in
101.40 IN for the aircraft arm.
4. Slide to ITEM 2, and tap enter to provide the
inputs for item number 2. Press
and tap enter to input the weight, then
and tap enter to input the arm for item number
2. This results in a moment of 24,320 LB-IN.
5. Slide to add ITEM 3 and tap enter to provide
the inputs for item number 3. Press
and tap enter to input the weight, then
and tap enter to input the arm for item number
3. This results in a moment of 11,250 LB-IN.
6. Slide to add ITEM 4 and tap enter to provide
the inputs for item number 4. Press
and tap enter to input the weight, then
and tap enter to input the arm for item number
4. This results in a moment of 17,280 LB-IN.
7. Slide to see the Weight and Balance Totals.
This displays output only, accounting for the
inputs in the items above. For this problem, the
outputs are:
Wt
......... 2,205 LBS
Mom
....... 204,443.00 LB-IN
CG ........ 92.72 IN
◗ WEIGHT AND BALANCE
The CX-3 performs all of the calculations necessary
for proper aircraft loading. The rst four items in
the Wt/Bal menu are used to dene the moment
reduction factor (RF), enter weight (Wt), enter arm
(Arm), and obtain the moment (Mom). An “ITEM”
is something that has an assigned weight and
corresponding arm and/or moment. Additional ITEMs
can be added as necessary. The steps are described
below in the context of solving a basic weight and
balance problem.
Standard weights used in aviation include:
AvGas
...... 6 lbs/gal
Jet fuel
..... 6.84 lbs/gal
Oil ......... 7.5 lbs/gal
(Remember: there are 4 quarts in a gallon)
Problem: Find the gross weight (GW) and center
of gravity (CG), given:
1. Aircraft empty weight: 1,495 lbs weight,
151,593 lb-in moment
2. Pilot and passengers: 380 lbs, 64’’ arm
3. Rear-seat passenger: 150 lbs, 75’’ arm
4. Fuel: 180 lbs, 96" arm
Solution: Press the key.
1. Select the Weight and Balance submenu. You
will dene the parameters for the totals (weight,
moment, and CG). An “ITEM” is a variable
with 2 of 3 known parameters such as weight
and arm, or weight and moment. The CX-3
can calculate 8 items for any one problem. If
you have more than 8 items, work 3 problems
(one with half the items; a second with the
remaining items; and a third with 2 items, using
the answers from the rst 2 calculations). You
are rst prompted for the reduction factor (RF).
Reduction factors are used with aircraft that
generate large moments for the purpose of
keeping the numbers a manageable size. It
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CX
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Flight Computer
W/B (E6-B FUNCTIONS)
W/B