View Single Post
Old Jul 14, 2010, 11:45 PM
The Don is online now
Find More Posts by The Don
Wonderfully Wicked
The Don's Avatar
Willoughby, Ohio
Joined Jan 2002
13,625 Posts
Installing the motor into the fan unit was not difficult. I took a few photos showing it. The real issue came with the spinner. With no spinner the fan runs quite well and pretty smooth. So I added the spinner and tried to balance it. After 45 minutes I realized there was no way it will balance too much out of round so I hooked up a 2S lipo and ran the motor fan unit at partial throttle and used a grinding stone and pressed it against the spinner while turning to try to smooth it out./ You can see by the photos how out of round the spinner is. I kept on going until it I would get full marks around the whole OD. So then I used some 320 grit paper and smoothed it some then 600 grit to get it even smoother. i then ran it up and was much smoother on a 2S lio. So I went to the 4S lipo again and at half throttle the fan vibrated bad. So I worked some more to balance, and I got it to run silky smooth up to 50% throttle then suddenly it would always go way out of balance. I finally gave up after about 45 more minutes of messing around. So I balanced it with no spinner on. I then test fit the parts for the outlet and inlet and it fit just fine.

As far as the spinner, I think the trouble is the screw is way down low and the rest of the spinner is unsupported and can flex at higher rpm. So for the heck of it I mixed up some epoxy and filled the spinner with it. I am letting it cure over night and I will see if it can be balanced now as the spinner will be acting as one unit. Worth a test anyhow.

The Don is online now Find More Posts by The Don
RCG Plus Member
Last edited by The Don; Jul 14, 2010 at 11:58 PM.
Reply With Quote