R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

Reply
 
Thread Tools Search this Thread
Old 12-10-2007, 09:40 AM   #16
Registered User
 
Join Date: Jun 2004
Location: ROAR HAD ME BANNED FROM RC TECH.
Posts: 2,025
Trader Rating: 2 (100%+)
Thumbs up

Quote:
I have a question regarding the running of XXX brushes with this motor (or any other similar motor for that fact). I am using it in a 1:10 tourer on a large open track.

I was running the Trinity XXX brushes (TRI13506NT) in this motor and my other Komodo (the Trinity Pro version) I have. In the Axiom motor I was running the installed purple/purple springs. My other Trinity Komodo has the standard red/green springs.

I have been told that I need to use really stiff springs when running these brushes (silver/silver). Is this the case? Won't that just cause more drag and cause the motor to be slower?
In general the harder the brush the harder the spring you need to run to compensate. XXX brush won't be sprung much different than a F however. In touring car, Purple/Red would be a good baseline. Red/Green is also good for rubber tire.

XXX Brush would be okay for outdoor or if it's very hot, but if you need more power the F will be a better brush but you'll go through them faster. If it were me I would spend the same amount of money on F brushes and try just changing them more often and see if you get better power doing so. You will spend the same amount of money, you'll just be rebuilding more often (fresher motor is faster anyway..)

Stiffer Spring = more torque and less RPM....when you lighten the springs you are freeing up the motor which will give you MORE rpm and LESS torque.

In touring car you typically need to run a heavier spring setup to generate the torque and also counter act the brush bounce caused by pushing the heavier car. Lighter cars, or high RPM applications and you can get away with springing lighter. The lighter you spring a motor the more rpm it can generate because there is less tension on the comm, the byproduct is however it also makes it easier for the brush to bounce causing you to loose power - there is a limit to how light you can spring for different applications.

With rubber tire you typically spring lighter because you can afford to lose some of the torque. More torque just means a higher chance of tire slippage.

Quote:
How hot can these motors get before the brushes start burning?

Where do I measure the temp? Can? Endbell?

Want to know how tall it can be geared before I start doing damage to it.
The danger is not in burning the brush but softening your magnets. One issue with KD19's is they run hot, on large out door tracks - especially in the summer - the motor will get so hot that you kill the power of your magnets. Someone in Florida told me they don't run the motors at all during the summer because the heat kills them, they run an Atlas instead since it can tolerate the heat better..

If the comm comes off purple after one run and the brushes look okay, you're geared to the moon and fast. If they come off in one run and the brushes are burned..you've gone too far..
Desolas is offline   Reply With Quote
Old 12-10-2007, 10:42 AM   #17
Tech Adept
 
Victor A's Avatar
 
Join Date: Aug 2005
Location: The Netherlands
Posts: 153
Default

@Desolas: You're totally right .
Victor
__________________
www.RcTouring.EU
Victor A is offline   Reply With Quote
Old 12-10-2007, 11:11 AM   #18
Tech Elite
 
1armed1's Avatar
 
Join Date: Apr 2005
Location: Northern Indiana
Posts: 3,075
Trader Rating: 79 (100%+)
Send a message via AIM to 1armed1
Default

Stiffer Spring = more torque and less RPM....when you lighten the springs you are freeing up the motor which will give you MORE rpm and LESS torque.




I guess Eddie, EA, and Dave have no clue. This discussion was covered months ago.

Stiffer equals more rpm because you get less arc and brush bounce,
Less spring will give more torque.
1armed1 is offline   Reply With Quote
Old 12-10-2007, 07:30 PM   #19
Tech Master
 
Swanny's Avatar
 
Join Date: Jun 2003
Location: Adelaide, South Australia
Posts: 1,618
Trader Rating: 3 (100%+)
Default

Thanks for the info. What are these F Brushes you speak of? I've heard people talk about them, but can find no information. Perhaps someone can provide me with a part number or something?
__________________
XRay T2'009 - Sanwa MT-4 - Futaba BLS551 - Tekin RS - Trinity 13.5
http://www.facebook.com/radioracingcarssa
Swanny is offline   Reply With Quote
Old 12-10-2007, 07:34 PM   #20
Tech Elite
 
B4james's Avatar
 
Join Date: Apr 2006
Posts: 2,162
Trader Rating: 13 (100%+)
Default

I can get them for you Swanny, PM me about them
B4james is offline   Reply With Quote
Old 12-10-2007, 07:37 PM   #21
Tech Champion
 
dgullickson's Avatar
 
Join Date: Oct 2002
Location: I'm a Dork Fish
Posts: 7,662
Trader Rating: 45 (96%+)
Send a message via AIM to dgullickson Send a message via Yahoo to dgullickson
Default

Quote:
Originally Posted by Swanny View Post
Thanks for the info. What are these F Brushes you speak of? I've heard people talk about them, but can find no information. Perhaps someone can provide me with a part number or something?
They are on our site, they produce the most power out of all the brushes I have tried and is the only brush I personally run anymore.

www.axiommotors.com
dgullickson is offline   Reply With Quote
Old 12-10-2007, 07:39 PM   #22
Tech Master
 
Swanny's Avatar
 
Join Date: Jun 2003
Location: Adelaide, South Australia
Posts: 1,618
Trader Rating: 3 (100%+)
Default

Quote:
Originally Posted by Swanny View Post
Thanks for the info. What are these F Brushes you speak of? I've heard people talk about them, but can find no information. Perhaps someone can provide me with a part number or something?
Found out they're made by FinishLine. Now I just need to know where to get them.
__________________
XRay T2'009 - Sanwa MT-4 - Futaba BLS551 - Tekin RS - Trinity 13.5
http://www.facebook.com/radioracingcarssa
Swanny is offline   Reply With Quote
Old 12-10-2007, 07:41 PM   #23
Tech Champion
 
dgullickson's Avatar
 
Join Date: Oct 2002
Location: I'm a Dork Fish
Posts: 7,662
Trader Rating: 45 (96%+)
Send a message via AIM to dgullickson Send a message via Yahoo to dgullickson
Default

Swanny - http://www.axiommotors.com/brushes-l...-23_27_38.html

In stock and can ship Tomorrow, doing orders now.
dgullickson is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Axiom Motors Mark G Team and Company Discussions 1834 09-16-2015 07:04 AM
axiom 13.5 duo brushless motor mike_holes Electric On-Road 6 06-29-2008 10:19 PM
Axiom stock motor p2k2 based 7HEAVN Australia For Sale/Trade 0 01-23-2006 05:18 AM
Axiom Motors ????????? tao3 Electric On-Road 19 07-07-2004 01:20 PM
Axiom motor review KerryG Electric On-Road 11 09-20-2001 10:57 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 05:17 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net