Extra 300LX, Maintenance Manual

Page: 93 / 515

CHAPTER 8
PAGE 4 PAGE DATE: 1. March 2011
MAINTENANCE MANUAL EXTRA 330LX
08-10-00 WEIGHING AND
CALCULATION OF C OF G
N O T E Weigh the aircraft only on even floor and in closed shops
(wind protected). Use three identical scales.
1 Ensure that the aircraft is fully equipped with equipment in
locations according to the equipment list (Pilot's Operating
Handbook & Flight Manual (POH & FM), section 6.6).
N O T E Empty weight includes unusable fuel.
2 Defuel the aircraft (wing tanks, center and acro tank) to the
amount of unusable fuel.
3 Replenish engine oil to the minimum sump capacity for ac-
robatic flight (refer to POH & FM section 1.7)
4 Remove foreign objects (e.g. tools, luggage, parachutes).
5 Clean and dry the aircraft.
6 Put the rear seat to middle position and close canopy.
7 Weigh two of those wheel chocks that will be used for se-
curing the main wheels. Enter the weight below in Page 5
"Tare weight scale 1/2 (chocks)".
8 Weigh the jack that will be used for jacking the tail wheel.
Enter the weight below in Page 5 "Tare weight scale 3 (jack)".
9 Roll the main wheels onto the scales 1 and 2.
10 Level the aircraft as per chapter 08-20-00.
11 Drop perpendiculars from the underside of the fire wall,
the centers of the main wheels and the tail wheel and mark
on the floor to get the arms X
1
and X
2
(see page 6).
12 Enter the arms on Page 6.
13 Read the scales and enter the weights below. Calculate the
net weights and transfer the values to page 6.
14 Calculate C of G using the formula given below (page 6).