Order No. 4451 Fuselage kit Order No. 4451.K ... - Graupner
Order No. 4451 Fuselage kit Order No. 4451.K ... - Graupner
Order No. 4451 Fuselage kit Order No. 4451.K ... - Graupner
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UNI-STAR 60<br />
6. Adjustments during the first flight<br />
6.1 Blade tracking<br />
"Blade tracking" refers to the height of the two rotor blades when they are spinning. The<br />
adjustment procedure aims at fine-tuning the pitch of the main rotor blades to exactly the same<br />
value, so that the blades rotate at the same level.<br />
Incorrectly set blade tracking, with the blades revolving at different heights, will cause<br />
the helicopter to vibrate badly in flight.<br />
When you are adjusting blade tracking you are exactly in the "firing line" of the blades,<br />
so it is important to keep at least 5 metres away from the model in the interests of safety.<br />
You can only check blade tracking if you are able to see clearly which blade is higher and which<br />
is lower. The best method is to mark the blades with coloured tape as follows:<br />
There are two alternative methods: figure "A" shows the use of different colours on the blade<br />
tips; fig. "B" shows the use of the same colour, but applied at different distances from the blade<br />
tip.<br />
Procedure for adjusting blade tracking<br />
1. Set the helicopter to the point where it is almost lifting off, then sight directly along the rotor<br />
plane.<br />
2. If you can see that the rotor blades are running in the same plane, no adjustment is required;<br />
however, if one blade is running higher than the other, the settings must be corrected.<br />
3. Locate the pushrods between the swashplate and the mixer levers; the adjustment is made<br />
at the ball-links on both ends of these pushrods: unscrew the links to raise the blade, screw<br />
them in to lower it.<br />
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