ChopperAddict's Hints & Tips


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   TIPS & TRICKS - A quick way to set the height of the swash plate initially 

There is quite a bit of misunderstanding about just how to get the right position for the swash plate when first doing the mechanical setup of any collective pitch helicopter such as the Esky Belt CP and others

One trick that I have found pretty accurate is as follows.

Once you have done the basic servo horn mechanical setup, disconnect the motor of the helicopter if you have not already done so, and then set the throttle to maximum, and put it into IDLE UP MODE if you are using the Esky stock Transmitter (TX) - YES, REALLY !!

Next, Turn the pitch control knob on the TX (if you have one) fully clockwise to set it to  maximum pitch.

Now check the position of the mixer arms hub, which slides up and down the mainshaft with the swash plate as you change throttle/pitch settings, and you will see that it will have been pushed up towards the head itself.

The picture below (its a different rotor head, but the principle is just the same) shows the swash plate all the way down at zero throttle.  Note the two guide pins above the mixer arms are fully visible.

Disconnect the three connecting rods that go from the servos to the swash plate, and then manually position the mixer hub as far up as it will go without touching the head block itself by pushing the swash plate slowly upwards.  Make sure you keep the swash plate level and keep the mixer hub just about 1mm below the head hub itself, so that it does not actually bind against it.

The picture below shows the swash plate in the fully UP position.  You can see quite clearly that those two guide pins are now sticking down through the mixer arm hub. You may also be able to see that the hub is just very slightly BELOW the head assembly itself.

Finally, adjust the length of the connecting rods from the servos to the swash plate so that they keep the swash plate in that position.  (Check to see if it is still level)

Now check the throttle movement to see if it slides up and down nice and smoothly and does not bind at the top.

That's all there is to it, your swash plate will now be in almost the best possible position, although in your final pitch range setup, you may find that you need to adjust it slightly.

The picture above shows the full throttle position a little better, with just a small gap above the hub through which you can still see the two guide pins, although the majority of the guide pins are now sticking down BELOW the hub.

Hope this helps you get the pitch range set more easily

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