ChopperAddict's Hints & Tips



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Tips & Tricks - Calming down a helicopter when you do not have a computer radio

This is quite an easy thing to do, and many beginners would do well to use this trick to make their helicopter a lot less jumpy while they are learning to hover.

If you have a computer radio such as a Spektrum DX6i or Futaba or JR, you would do this very easily by adjusting what is called the Exponential, so that it takes more movement of the cyclic stick around the centre point to make the servo move a given difference.  Once outside that area the servo will move faster for the same movement so that you still have full servo arm travel.

Stock Radios such as those that come with many helicopter kits today do not have any such adjustment, but we can still tame the "wild beast" down quite a bit to make it easier for you to learn to hover and/or fly.

What you need to do first is to measure the diameter of your helicopters flybar.  Next, find a collet that has the correct internal diameter, and is held in position by a grub screw of some form.   Most LHS will have some of these as they are used a lot in fixed wing aircraft (planks)

You may need up to 4 collets, so make sure you get enough.  Remove the Flybar Paddles of each end of the flybar, but before doing so mark the position of the inside edge of the blade so that you can refit it in the same place afterwards.  For the first attempt, slide two collets over the flybar, and nip them in position, the outer one having it's  outside edge on the mark you made for the paddle blade, and the other one inside that.

Repeat the process on the other side, and then refit the paddle blades, making sure once it is all tightened up that both paddles are exactly the same distance away from the central hub of the flybar carrier.

What we have done basically is to add quite a bit of extra weight to the flybar paddles, and this is what softens the handling down. 

Try bringing your helicopter to the hover, and see how it responds to cyclic inputs.  If it is TOO soft, remove one of the collets from BOTH sides.

This should make your helicopter a lot more gentle and easier to hover.

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