Extra 300/SC - 08-10-00 WEIGHING AND CALCULATION OF C OF G

CHAPTER 08
PAGE 4
MAINTENANCE MANUAL EXTRA 300/SC
PAGE DATE: 16. June 2008
08-10-00 WEIGHING AND
CALCULATION OF C OF G
N O T E Weigh the aircraft only on even floor and in closed halls
(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).
2 Defuel the aircraft (wing tanks, front and rear center
tanks) to the unusable fuel level.
3 Replenish engine oil to the minimum sump capacity for
acrobatic flight (refer to POH&FM Section 1.7)
4 Remove foreign objects (e.g. tools, luggage).
5 Clean and dry the aircraft.
6 Put the seat to middle position and close canopy.
7 Weigh two of those wheel chocks that will be used for
securing 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 ch. 08-20-00.
11 Put the control surfaces to neutral position.
12 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).
13 Enter the arms on page 6.
14 Read the scales and enter the weights below. Calculate
the net weights and transfer the values to Page 6.
15 Calculate C of G using the formula given below (Page 6).