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Maintenance Manual
FLY SYNTHESIS TEXAN
TOP CLASS 580 ISR
(For Rotax 912 ULS
versions)
Identification: MM_TC_580_Rev.2
Page: 21 of 77
Date: 15/02/11
Issued: C. Cosatto
Verified: C. Cosatto
Approved: C. Cosatto
Revision Description:
Placard update
8.
Remove the airplane from the scales, record the weight of the supporting wood
pieces of each scale as tare weight for that scale,
9.
Change the left and right scales for the main wheels, and repeat the weighing
procedure again. Record results in the weight report,
10.
Calculate the average weight value for each wheel.
11.
Calculate the Empty Weight and the Empty Centre of Gravity position for the
airplane.
X1 is the distance from nose wheel axle centerline to projection of RD.
X2 is the distance from main wheel axle centerline to projection of RD.
The standard distance is:
X1 = 925mm (±0.5%)
X2 = 655mm (±0.5%).
The formula for CG calculation is as follows:
Xt = ML / PT
. [CofG position in mm on the wing chord]
Where:
ML = (P2DX + P2SX) x X2 - P1 x X1
Xt% = (Xt / MAC) x 100
[CG position in percentage to the wing chord]
ML = Empty weight moment
P2DX , P2SX = Weight measured on main wheel
P1 = Weight measured on nose wheel
NOTE:
DX = RHS SX = LHS
The first recording of the Weighing Report & the Center of Gravity Position of the aircraft
is taken at the factory before the delivery of the same aircraft. The
Factory Weight and
Balance repor
t will accompany the Aircraft on delivery.
Every variation due to the installation of new components or repairs and painting,
implicate a new calculation of the empty weight and the relative positioning of the center
of gravity.
Any weight and Balance changes should be recorded into the aircraft log book.