Extra 330lx - General Weight and Balance; Aircraft Weighing Procedure; General Weight and Balance Procedures

Page Date: 19. February 2014 6 - 3
Section 6
Weight and Balance and Equipment List
Pilot´s Operating Handbook US
EXTRA 330LX
6.1 GENERAL
This section describes the procedure for establishing the basic weight and moment of the
aircraft. Sample forms are provided for reference. Procedures for calculating the weight and
movement for various operations are also provided. A comprehensive list of all equipment
available for this aircraft is included. It is the responsibility of the pilot to ensure that the
aircraft is loaded properly.
6.2 AIRCRAFT WEIGHING PROCEDURE
The aircraft weight is determined by weighing all three wheel loads simultaneously by three
scales with the aircraft levelled.
(Upper fuselage reference line horizontal)
Datum line for weight arms x is the fire wall.
X1 = distance: fire wall - main wheel
X2 = distance: fire wall - tail wheel
XN = distance: fire wall - item N
XG = distance: fire wall - Center of Gravity
W1 = Sum of weights indicated by the two scales below the main wheels
W2 = Weight indicated by the scale below the tail wheel
W = Total weight = W1 + W2
XG = (W1 x X1) + (W2 x X2) = CG position
W
W = W1 + W2 ,
(W1 x X1) + (W2 x X2)
W
XG =
W1
W
W2
x
2
x
1
x
G
Reference Firewall (plane)