New DJI Balance Rings - for Jello-Free video..

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SkyREV

New Member
SkyRev
........Balance Rings
..............V i b r a t i o n...R e d u c t i o n...S y s t e m


..............DJI 2212 - F330, F450, F550, Phantom
..............(and other 28mm Motors)


  • Virtually eliminates Motor induced vibration for Jello-Free video.
  • Knurled top surface allows Props (such as Graupner) to be used without washers.
  • Dissipates heat from motor for better cooling.
  • Easy to install investment (Your IMU will thank you..)
  • And, at 7.4g - They just look Cool...

.........Limited Qty - shipping Int'l 3.11.13
.........(PayPal - Quad $49.95, Hex $74.95 + postage)
.........Includes: Rings, Test Collars, Set Screws & (believe it or not) Instructions
............Made in USA (That's why they cost - But, they actually Work.)


.....THE FINE PRINT: Although the SkyRev Balance Rings can be used to ' Dynamically ' balance a Motor and
.......(slightly unbalanced) Prop together, this can be very dangerous to setup - and is therefore not recommended…
 

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OneStopRC

OneStopRC

Dirty Little Hucker
THE FINE PRINT: Although the SkyRev Balance Rings can be used to ' Dynamically ' balance a Motor and
.......(slightly unbalanced) Prop together, this can be very dangerous to setup - and is therefore not recommended…
Click to expand...


Hmmmm......
 

OneStopRC

OneStopRC

Dirty Little Hucker
Question is, what does this do to the torque of the motor? it will obviously spin up slower, which in turn might not be a good idea.
 


S

SkyREV

New Member
mitsaras said:
So, OK, it looks cool - but how is it supposed to work? some more info would be needed...
Click to expand...

Although step by step instructions are included with the Balance Rings..
The 'Basic' concept is this:


A Balance Ring is placed on a (DJI-compatible) motor. It will 'snap' into place. A (included) collar holds the Ring in place (without Prop) while tuning.
Small set screws (included) are added to the Ring to counter-balance the heavy side(s) of the motor.


By spinning up the motor, (and moving, adding or removing set screws around the Ring), you will be able to "Feel" when the motor is perfectly balanced.
(Although not required - an iPhone / Android Vibration App can also be used to extremely fine-tune the Balance.)




Note: Fine-tuning the Rings has shown (iPhone Vibration App) that levels of: X-.002, Y-.002, Z-.003 can be achieved.
ie. Virtually NO motor-induced vibration.
 

OneStopRC

OneStopRC

Dirty Little Hucker
So no answer to my question then? As I asked before, this will act like a flywheel of a sort, it will require more effort to spin these up to speed and more time to slow it down. Do you have any factual results on how this will effect one of these motors?

I like the fact I have a positive response on my throttle, with these on, they are going to be reduced. I also take it, they weigh in at 7.4g a piece, for a total of 29.6g + Screw for 4 motors and 44.4g for 6 motors + screws?
 

S

SkyREV

New Member
It seems logical that any time you add any weight to a motor (ie. a heavy Xoar prop or Balance Rings) that the response time would be reduced.
We thought it would be a trade-off for a smooth happy ship :)


We tested with a F550 Hex w/ WKM, F450 Quad w/ NAZA and the worst case scenario, a TBS Discovery FPV frame w/ NAZA…


Our initial Hover and Slow flight testing indicated that the Rings made a "Night & Day" difference - The video was rock solid and the ship's seemed smooth and 'Happy'…


Sustained Fast Forward Flight seemed normal as well..


Throttle response for 'full-Power' climb from Hover seemed to have a slight delay. (As expected)
Flips with the Quad also showed that initial Cyclic response was slower as well..


So, like everything in life, there is no magical solution to solve all problems.
If you want to hot-dog around with a 'crisp feel', take the Rings off.
If you want a smooth video flight, Put the Rings back on…


Hope this answered a few of your questions...
 


D

DennyR

Active Member
The concept is not new, You can find it on the front of some old V8 engines as a front end dampener. It offsets the hub as a means to move the center of mass to the best position.
 
Last edited by a moderator:

Bartman

Bartman

Welcome to MultiRotorForums.com!!
SleepyC said:
Dosen't Robert Vess own the patent to the balance ring?
http://www.vesspropellers.com/servlet/the-Vess-Balance-Rings%21/Categories
Click to expand...

i was going to mentiion the same thing, it's been done on giant scale gas engines for a while now. the same thing can be done with a small pieece of carbon fiber shaped like a guitar pick. just put the pointy end opposite the heavy side of the motor and it'll balance it right out. (must resist urge to draw guitar pick on autocad.....must....resist)
 



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uahio777

Member
Nice and very informative knowledge i gain from here about the motor torque which is very helpful for my professional life..How can i weight the motor?By which scale i the best?
 


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