Flight Manual STEMME S6
Doc.-No: P400-006.000 E Page: 6-4 Revision: ---
Date of Issue: 07. October 2008 Date of Rev.: --.--.----
• The reference plane (RP) is located at the leading-edge of the inner-wing at
the wing-root. It is aligned vertically to the longitudinal-axis. This plane
creates a reference line on the ground.
• Longitudinal-inclination: Place a wedge 1000:42 (2,4° = 2°26‘) on the rear
fuselage-section. Align the top of the wedge horizontally.
• Keep in mind that the lateral-axis must be almost horizontal.
When the aircraft is aligned properly, reference points are projected vertically
down onto the ground from the root leading-edge of the left and right wings. This
generates a vertical plane. The connecting line between the two reference
points is the reference line. From this reference line, the distance to the front
landing-gear (distance b) and main landing-gear (distance a) is measured. (See
Illustration 6-1: Aircraft alignment during weighing)
The following formulas are used to calculate the empty-mass, the empty-mass-
moment and the empty-CG-location:
Empty-Mass m
Empty
[kg] :
BRLEmpty
mmmm ++=
Empty-Mass-Moment M
Empty
[kgm]:
bmamamM
BRLEmpty
⋅−⋅+⋅=
Empty-CG_Location from the reference plane D
SL
[m] :
Empty
Empty
m
M
x =
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