11.
Fine Tuning of the Helicopter
If the nod or roll trim must be adjusted a lot fort he helicopter to hover stably, you can also mechanically adjust the
swash plate linkage.
For this, lift the canopy from the two retaining pins on the left and right. Observe that the small attachment discs (see
figure 18, item 1) on which the canopy is placed are not lost.
The swash plate is controlled by two linkage rods (2) at
the front with one ball joint ring (3) each.
These rings can be carefully removed from the joint
balls of the swash disc.
If you turn the joint ring on the linkage rod, the rods can
be extended or shortened, depending on rotational di-
rection. Then the joint ring is attached to the swash
disc ball again carefully.
The left linkage lever (4) of the swash plate in flight
direction is responsible for the roll function. If the link-
age rod is shortened, the helicopter flies to the left. If
the linkage rod is extended, the helicopter flies to the
right.
Figure 18
The right linkage lever (5) of the swash plate in flight
direction is responsible for the nod function. If the link-
age rod is shortened, the helicopter flies forwards. If
the linkage rod is extended, the helicopter flies back-
wards.
Set the linkage rods so that the model helicopter hovers stably without any large adjustments of the nod and roll trim
out of the centre position being required.
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