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C4 - GENERAL - Where do I add weight to a main blade when balancing them ?

The first thing I suspect I need to do is explain what you need to do to balance your main blades, but I have already done that HERE........

Once you have found the COG (Centre of Gravity) and made sure that both blades have exactly the same point, you have to balance each blade against the other one of the pair. You do this using a blade balancer, or you can use a bolt through the mounting holes sitting on top of something suitable so that the blades can hang down and move freely.  Once you discover that they do NOT balance, you obviously have to add more weight to the LIGHTER blade.

Well, a lot of people assume that you add it to the outside end, where you have the tracking tape already, but that is WRONG...

If you were to do that, you would of course change the COG on that blade, which you definitely  do not want to do. So you place any additional balancing tape (electrical tape usually) around the centre of the lighter blade, exactly over the mark you have made for the COG.  That way the COG remains correct, and you can add as much weight as you like at the COG of the lighter blade.

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