Wattflyer RC Network: RC Universe :: RCU Magazine :: RCU Forums :: RCU Classifieds :: RCU User Reviews :: RCU YouTube
Home Who's Online Calendar Today's Posts RealTime Post Spy Mark Forums Read
Go Back   WattFlyer RC Electric Flight Forums - Discuss radio control eflight > Electric R/C Airplanes > Electric Ducted Fan Jets
Register Members List Wattflyer Extras Articles Search Today's Posts Mark Forums Read Social Groups

Electric Ducted Fan Jets Discuss electric ducted fan jets here including setup tips, power systems, flying techniques, etc.

Thank you for your support (hide ads)
Thread Tools Display Modes
Old 02-20-2011, 11:46 AM   #1
Flying cabbage chopper
Join Date: Jul 2006
Location: Southern Oregon Coast
Posts: 13
Thanked 1 Time in 1 Post
Club: Redwood Empire Modeler's Association
Send a message via Yahoo to Reindeer
iTrader: (0)
Friends: (0)
Default Balancing an EDF impeller... magnetic balancer vs knife edge balancer

Hey everyone! Hope your model building season is going great!

OK, I have a question... putting together a Squall EDF, and are getting ready to balance the impeller for the EDF unit. Now, from what I have seen, most people seem to be using a magnetic balancer to do the job. I do understand the advantages of using magnets as there is no friction on the balancing shaft and therefore should obtain the most accurate results.

However, right now I own a Dubro 499 Tru-Spin prop balancer. Difference is that this unit uses a series of knife edge wheels to support the balance shaft. Thus far I have used this balancer on a LOT of props, wheels, along with a few heli head assemblies, and the results have always been satisfactory, at least for my purposes.

So the questions I have is how much of a difference would there be between the two units, and would it really be worth spending the extra $25 - $30 delivered to get a magnetic balancer?

Thank you!
Reindeer is offline  
  Reply With Quote
Old 02-21-2011, 08:22 AM   #2
Past President of PSSF
Wildflyer's Avatar
Join Date: Sep 2009
Location: Lacey WA, 1 mile E of Mushroom Corner
Posts: 1,698
Thanked 168 Times in 163 Posts
Club: Puget Sound Silent Flyers -PSSF & Thurston County Miniature Aircraft Association - TCMAA
iTrader: (3)
Friends: (8)

I have the old Hi-Point balancer, I believe it is simply the original version of the unit you have. I also have 2 of the magnetic balancers.

I'll probably start something but I have more confidence, in the wheel type Hi-Point unit.

I have spun the empty shaft on both, and the wheel type takes far longer to stop, there must be some friction in the magnet type.

I keep the magnet type in my field box, and the other one at home.

I did see some instructions written by the mfg, telling how to polish the magnets, or put some kind of covering on them to reduce friction, also to polish the ends of the shafts.

If you would like, I will sell you a brand new, unopened, TF precision magnetic balancer, for $20 delivered

Dave R, KI7MTA Proud PGR rider.
When you have flying skills like mine,
You become a master at repair.
Wildflyer is online now  
  Reply With Quote
Old 02-22-2011, 07:50 PM   #3
Join Date: Jan 2009
Posts: 57
Thanked 9 Times in 8 Posts
iTrader: (0)
Friends: (0)
Default magnetic balancer

Magnetic balancers are great when they have a true shaft and true centering cones (mine does not). Your balancer may be adequate. I've found that even when the fan is balanced, the spinner can throw everything out and it must be repositioned until it runs smooth. The motors can also throw the assembly out but repositioning a slightly out of balance spinner can fix it.
Just apply power slowly the first few runs and if vibration is noticed reposition the spinner a partial turn and try again. Once you find the "sweet spot" mark it so it can be reassembled in the right place in the future.
4stripes is offline  
  Reply With Quote

  WattFlyer RC Electric Flight Forums - Discuss radio control eflight > Electric R/C Airplanes > Electric Ducted Fan Jets

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
How to Balance a EDF Impeller CHELLIE Electric Ducted Fan Jets 15 01-23-2011 04:07 PM

All times are GMT +1. The time now is 05:34 PM.

Powered by: vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright 2005 WattfFlyer.com
RCU Eflight HQ

Charities we support Select: Yorkie Rescue  ::  Crohn's & Colitis Foundation

Page generated in 0.06827 seconds with 22 queries