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Old Oct 16, 2014, 10:31 AM
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Joined Apr 2012
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90mm 8s setup

Hi all experts,
After I bought some fans complete
I want to buy the motor separately and install it into a fan and balance
The fan, I'd appreciate it if you recommend a good Prop Balancer ,
I noticed that adapter It has no flat area at the end of the screw, So how can I release the fan in case I want to replace it
I would love for some tips,
So after searching on hk
I think I found what I was looking for
Motor,
http://www.hobbyking.com/hobbyking/s...dProduct=28503
Fan,
http://www.hobbyking.com/hobbyking/s...dProduct=30632
Adapter,
http://www.hobbyking.com/hobbyking/s...dProduct=35875
spiner,
http://www.hobbyking.com/hobbyking/s...dProduct=35876
Thanks in advance
And sorry for my English
nati.
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Old Oct 16, 2014, 11:07 AM
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Canada, ON, Burlington
Joined Jan 2009
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I usually cut a slot at the end to take a large flat blade screwdriver to help with tightening and loosening.
A Dremel tool cutoff wheel or hack saw will do.
Don't forget you will need a shroud that can take this large motor.
The 90mm Changesun is a perfect fit.
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Old Oct 17, 2014, 02:31 AM
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Joined Apr 2012
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Thank you 4stripes
Sounds great, I'll try to cut a slot at the end,
By the way I've got some old lander metal shroud with four Stators and I'll have to adjust the fan,
What prop balancer do you recommend me
Thanks again.
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Old Oct 17, 2014, 03:33 AM
Aka: Tom Jenkins
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Palm Beach County, Fl.
Joined Aug 2008
4,488 Posts
Quote:
I usually cut a slot at the end to take a large flat blade screwdriver to help with tightening and loosening.
A Dremel tool cutoff wheel or hack saw will do.
It also pays to have a correct size tap on hand to chase the threads after cutting a slot so the spinner screw doesn't gall the aluminum threads.
Potatos are cheap but the sour cream and chives ad up! $$$$$
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Old Oct 17, 2014, 04:48 AM
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I use an old Dubro prop balancer. Any shaft through the hub resting on two flat surfaces will do. The static balance of the fan is just the start. The fan must then be dynamically balanced on the motor and adapter (find the smoothest running position using the clock method). Then do the same with the spinner. Sometimes this will be good enough, but you may have to add a little weight inside the spinner if it doesn't run perfectly smooth.
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Old Oct 18, 2014, 04:37 AM
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Thank you very much 4stripes,
Now I'm trying to balance a 90mm fan dr m trust
I hope I can balance it, seems that the adapter is the tricky part
I also read your article on dynamic balance
Really helped me
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Old Oct 18, 2014, 08:24 PM
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You are welcome. I hope to make a few more EDF fliers find the fun without the hassle.
Be sure to run the fan in a safe mount when you are dynamically balancing with eye and ear protection. Even your fingers with thick leather gloves. Don't use more than low power until the fan is running smooth. One high speed run with bad balance can weaken the motor mount to the point where it will break free causing catastrophic failure.
Good luck!
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