
Flughandbuch XCitor
- 33 -
11 WEIGHT AND BALANCE
11.1 PROCEDURE
The trike must be ready to fly with all equipment as described in the equipment list,
but with no fuel on board, no pilot and no payload.
If there is fuel left in the tank it must be taken into account within the calculation.
As displayed in the picture the trike must be standing on three scales horizontally.
The upper side of the engine mount is used as a horizontal reference.
Then the C.G. calculation can be done as following:
Weight at front wheel
F
v
Weight at rear wheel on the right side
F
hr
Weight at rear wheel on the left side
F
lr
Distance between glider attachment point and front
wheel
L
v
Distance between glider attachment point and rear
wheels (only longitudinal component)
L
h
Distance between CG and glider attachment point
(positive, if CG is behind the attachment point)
∆
s
∆
s can be calculated as following:
This distance must be smaller than ± 50 mm. Otherwise the glider attachment
points must be relocated until the XCitor will hang nearly horizontally. This can be
achieved by loosing the 2 M6-screws on each side, moving the clamps until they
have the correct position and tightening the screws again.
The correct position must be confirmed with another measurement of the wheel
loads and / or with a hang test.
v
v
hr
hl
h
hr
hl
v
F
L
)
F
F
(
*
L
F
F
F
s
−
+
+
+
=
∆