GRAUPNER heim UNI-Mechanik 2000 Mode D'emploi page 78

The pushrods 4618.150 now have to be adjusted to obtain the maximum possible collective
pitch range. This is the procedure:
Slide the swashplate up as far as it will go (you may have to disconnect the ball-links on the
outer ring to make this possible). The swashplate should then rest exactly against the collective
pitch compensator when the compensator itself rests against the underside of the main rotor
head. If this is not the case, you must adjust the angled pushrods 4618.150 as follows:
The swashplate contacts the collective pitch compensator, but there is a gap between the
•
collective pitch compensator and the rotor head there:
The collective pitch compensator contacts the rotor head, but there is a gap between the
•
swashplate and the collective pitch compensator:
Note that it is essential to adjust both pushrods by the same amount, i.e. they must remain the
same length.
The final step is to carry out the fine adjustment of the auxiliary rotor, to ensure that the Hiller
paddles are exactly parallel to the swashplate when the swashplate is set horizontal. If you need
to make adjustments here, rotate the pushrods 4618.150 in opposite directions by the same
amount; don't adjust only one pushrod!
Set the two pushrods between the swashplate and the mixer levers as stated below:
The pitch range of the rotor blades depends amongst other things on the position of the linkage
balls to which the double ball-links (between the flybar and the mixer levers on the blade
holders) are fitted: fitting the balls in the inner holes sets the standard range, but fitting them in
the outer holes expands the collective pitch range by about 4.5°.
When the servos are at centre, you should obtain the following range of blade pitch angles:
(Note: you can fine-tune the collective pitch setting for the hover by making adjustments at the transmitter)
Length Hover coll. pitch
„X" (ball inside)
43 mm 0°
46 mm
3°
48 mm 5,5°
lengthen both pushrods.
Hover coll. pitch
(ball outside)
0° For „3-D" flying
4° Normal setting, equally suitable for hovering
and aerobatics
7° Hover at low main rotor rotational speed
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UNI-Mechanics 2000
shorten both pushrods.
Note