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HomeAircraftHelicopterThunder TigerOther › Balancing the fan Question for Rappy .50
05-03-2005 03:51 PM  13 years agoPost 1
mcoccia

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Central Jersey

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Hi,

Need some help maybe.

I am balancing the fan on the High Point and is coming up in the same position all the time, is this good? Not sure since this the first time I am using the balancer to balance the fan.


Thanks
Mark

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05-03-2005 04:03 PM  13 years agoPost 2
tyuditsky

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No, that means it's not balanced.....by stopping at the same point everytime, the lowest point is your heaviest point. So you drill a little bit away at a time until the fan stops when it runs out of momentum, and you can get it to stop at any position.

Evo90, HyperRaptor, T-Rex

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05-03-2005 04:45 PM  13 years agoPost 3
mcoccia

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tyuditsky,

Thank you. One more question... I start drilling on the heavy side correct?


Thanks
Mark

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05-03-2005 04:46 PM  13 years agoPost 4
SLiebl

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You remove material from the heaviest side (making it closer to the light side).

-Steve

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05-03-2005 07:46 PM  13 years agoPost 5
mcoccia

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Thank you Steve

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05-03-2005 11:49 PM  13 years agoPost 6
Al Magaloff

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This is a tedious process, but well worth the time invested.

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05-04-2005 01:51 AM  13 years agoPost 7
mcoccia

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Central Jersey

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Al Magaloff
Thanks again

Always a pleasure.


Mark

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05-07-2005 05:07 PM  13 years agoPost 8
mcoccia

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Central Jersey

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I had to place this on hold until now. One more question.. Do I drill holes in front or back of the fan?


Thanks
Mark

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05-07-2005 05:44 PM  13 years agoPost 9
SLiebl

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Well, if it's a hole, it'll most likely be on both sides of the fan when you're done won't it?

-Steve

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05-07-2005 06:02 PM  13 years agoPost 10
mcoccia

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No that's not what I meant. I will not be drilling straight through just taking some of the plastic off.

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05-07-2005 06:19 PM  13 years agoPost 11
helicopterMark

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Rumson, NJ

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I would say the back of the fan, but I very well could be wrong :-) so wait and see if someone else agrees with me before you do any drilling !

Mark

Mark Schneider
Team Heli Wholesaler; Rotor Rage; YS; Perfect Regulators
www.helimark.com

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05-08-2005 05:10 AM  13 years agoPost 12
rtrickyjr

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Drumore, PA (SW of Quarryville)

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Balancing the fan
What are you guys using on the fan to offset the threads in the fan so you can get a good balancing job? Do you have some kind of a threaded rod to use on the high point?


-Rick-

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05-08-2005 05:15 AM  13 years agoPost 13
Al Magaloff

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Chamfer the top of the hole first.

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05-08-2005 05:19 AM  13 years agoPost 14
rtrickyjr

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Al
Thanks much, didn't realize it was that simple


-Rick-

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05-08-2005 05:23 AM  13 years agoPost 15
Al Magaloff

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Most people don't realize, that the threads will put the fan hub off center on the HighPoint cone.

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05-08-2005 05:26 AM  13 years agoPost 16
rtrickyjr

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Al
Do you just use a cone shaped grinding wheel in a dremel, or a drill press, to chamfer the end that the nut will sit against? Or do you have another way that works well for you?

As always, Al, your a great teacher for us students


-Rick-

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05-08-2005 10:57 AM  13 years agoPost 17
Al Magaloff

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your a great teacher for us students
I'm a student at the school of "learn the hard way"! I chamfer with a countersink in the drill press. The chamfer needs to be done well, or you are no better off than keying on the end of the threads.

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05-08-2005 05:01 PM  13 years agoPost 18
rtrickyjr

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countersink
Is there a size I need to get? Not familiar with them, but I'm going to get one


-Rick-

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05-08-2005 05:21 PM  13 years agoPost 19
Al Magaloff

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Rick, search McMaster.com for item number 2846A125 as an example. Single flute 82* high speed steel. Choose a tool that is slightly larger in diameter, than the largest hole you intend to do.

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05-08-2005 05:24 PM  13 years agoPost 20
rtrickyjr

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Thanks
Much appreciated. I'll measure the dia. of the fan hole and buy accordingly. Thanks again,


-Rick-

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