how to balance fan?

[maxime]

how should I best balance my fan? it's a metal TT upgrade fan for the raptor 50, and I bought it with allready 1 magnet on it(from previous owner) and would like to know if the balance is allright.

how do you guys do this? or do you never do this?
Do you just put the same magnet opposed to the other magnet?

[DavidH]

http://www.helifreak.com/viewtopic.php?t=1417

[maxime]

thanks a lot.

one last question. I know probably not a lot of people dial indicate their fans on a raptor 50, but I'm quite of a perfectionist.

I don't really have a vibration on my heli, except the tail that goes left and right for fast about 1 or 2 mm's(and it's not the gain, and engine is running smooth). So I believe I could increase tail performance that tiny bit more with dialing the fan

which dial indicator should I buy? one for measurement of the top side of the fan, or the model which measures the inside of the fan?

so this model,
http://www.helifreak.com/download.php?id=3222

or this one

http://www.helifreak.com/album_mod/upload/f6d0224e5c6435b69d8ee3ab1eb9b573.jpg

[DavidH]

I dial indicate the inside of the fan as in the picture above.

That dial indicator in the picture is called a test indicator. That is a Starrett and expensive.
You can get a dial indicator and magnet vase and vise at Harbor Freight for less than $50. It will do the same job.
I use the plunger type dial indicator and check the inside top edge of the fan hub. It will do that just fine.

David