GRAUPNER heim Starlet 50 Mode D'emploi page 76

3.4 Installing the main rotor head
Fit the main rotor head on the main rotor shaft.
Align the hole in the rotor head with the top cross-hole in the main rotor shaft, then fit the special
screw 4618.87 to fix the parts together.
The next step is to install the pushrods 4618.150 and 4618.151 which you have just prepared;
their positions are shown in the drawing. Note that the arms of the mixer levers 4618.32 are of
different length: the double ball-links attached to the flybar must be pressed onto the longer
lever arms, whereas the straight pushrods run from the shorter, inner levers to the swashplate.
The angled pushrods 4618.150 now have to be adjusted in order to obtain maximum possible
collective pitch adjustment range. This is the procedure:
Disconnect the ball-links on the swashplate outer ring (if necessary), and slide the swashplate
up as far as it will go. The swashplate should now rest against the collective pitch compensator
when the compensator itself is resting against the bottom face of the main rotor head.
If this is not the case, the angled pushrods must be adjusted as follows:
• The swashplate rests against the collective pitch compensator, but there is a gap between
the collective pitch compensator and the rotor head:
• The swashplate rests against the rotor head, but there is a gap between the swashplate and
the collective pitch compensator:
It is essential to adjust the length of both pushrods by the same amount, i.e. they must always
be exactly the same length.
Now carry out the fine adjustment of the auxiliary rotor, ensuring that the Hiller paddles run
parallel to the swashplate when the swashplate is exactly horizontal. If you need to adjust the
length of the pushrods 4618.150, always adjust them in opposite directions by the same
amount; never adjust only one of them!
shorten both pushrods.
lengthen both pushrods.
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Starlet 50