Aerospool WT9 Dynamic LSA / Club, Pilot Operating Handbook

Page: 113 / 204

Initial issue EASA Approved Page 6-3
6.2 Aircraft Weighing Procedure
Calculation Method
When a compact piece of equipment is installed on (or removed from) the aircraft and an accurate weight and center
of gravity arm (distance from the aircraft
’s Reference Datum to the installed equipment’s center of gravity) can be
accurately specified, the newly configured aircraft ’s Basic Empty Weight / Moment can be calculated using the
aircraft ’s Weight an d Balance Record (Chapter 6.3).
CAUTION
When calculating a new Basic Empty Weight / Moment pay close
attention to ensure consistent usage of measuring units
(U. S. Standard or Metric).
1.
Record the date the item was installed on (or removed from) to the aircraft in the “ Date “ column.
2. Mark an “X“ into the “Item No. In ” column if the equipment was installed.
3. Mark an “X“ into the “Item No. Out ” column if the equipment was removed.
4. Record a brief description of the item or modification into the “ Description of Article or Modification “ column.
5. Record the item’s weight into the “ Weight Change “ column’s “ Weight “ column:
a) “ Added (+) “ column for installed items.
b) “ Removed ( – ) “ column for removed items.
6. Record the item’s CG arm into the “ Weight Change “ column’s “ Arm “ column:
a) “ Added (+) “ column for installed items.
b) “ Removed ( – ) “ column for removed items.
7. Calculate the moment by multiplying the item’s weight and arm together and enter the resulting value into the
“ Weight Change “ column’s “ Moment “ column:
a) “ Added (+) “ column for installed items.
b) “ Removed ( – ) “ column for removed items.
8. Calculate the aircraft ’s new Basic Empty Weight and enter the value into the “ Basic Empty – Weight “ column:
a) For added items, calculate the aircraft ’s new Basic Empty W eight by adding the item’s weight to the
aircraft ’s previous Basic Empty Weight.
b) For removed items, calculate the aircraft ’s new Basic Empty W eight by subtracting the item’s weight from
the aircraft ’s previous Basic Empty Weight.
9. Calculate the aircraft ’s new Basic Empty Moment and enter the value into the “ Basic Empty – Moment “ column:
a) For added items, calculate the aircraft ’s new Basic Empty M oment by adding the item’s moment to the
aircraft ’s previous Basic Empty Moment.
b) For removed items, calculate the aircraft ’s new Basic Empty M oment by subtracting the item’s moment
from the aircraft ’s previous Basic Empty Moment.