R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 05-26-2004, 03:43 AM   #8686
Tech Rookie
 
Join Date: Oct 2003
Posts: 15
Default

Why are in the lighweight diffs bushings used?Could I replace them with bearings....what are the differences?

Thx a lot,mc_rr
MC_RR is offline   Reply With Quote
Old 05-26-2004, 04:25 AM   #8687
Tech Addict
 
Simon K's Avatar
 
Join Date: Aug 2001
Location: Wellington, New Zealand
Posts: 573
Default

Just wondering what sort of small fan to use to cool the motor(I've seen some cars setup like this).
Is a 12v 4 cm Ball bearing fan from a PC suitable or should I try a lower voltage(5v?) one of the same size?
Simon K is offline   Reply With Quote
Old 05-26-2004, 07:29 AM   #8688
Tech Legend
 
Cain's Avatar
 
Join Date: May 2002
Location: West Fargo, North Dakota
Posts: 28,328
Trader Rating: 233 (100%+)
Default

from what I was told the reason was the load on a bearing would cause it to fail or something along that lines, basically the bushing was better to use. Though, if the bearings work in that location, I wouldn't be suprised you don't have any problems.
Cain is offline   Reply With Quote
Old 05-26-2004, 10:18 AM   #8689
Tech Addict
 
Join Date: May 2004
Location: Hawaii
Posts: 690
Trader Rating: 30 (100%+)
Default

Thanks, everyone for your replies.

Regarding using the bearings instead of the bushings in the lightweight diffs, the bearings will not fit. I have dremeled out some of the diff to make more room to fit the bearings. So far, it has been working great.
wrxnfx is offline   Reply With Quote
Old 05-26-2004, 11:41 AM   #8690
Tech Regular
 
Join Date: Nov 2003
Location: Driver's Stand- Tulsa, OK
Posts: 280
Default

You must have the wrong bearings. Mine fit fine, no dremel necessary.
JWATT is offline   Reply With Quote
Old 05-26-2004, 12:49 PM   #8691
Tech Rookie
 
Join Date: Oct 2003
Posts: 15
Default

but why are the bushings much thinner' than the bearings...?The bearings fit, but they are not completely countersinked as the bushing...
MC_RR is offline   Reply With Quote
Old 05-26-2004, 12:56 PM   #8692
Tech Regular
 
Join Date: Nov 2003
Location: Driver's Stand- Tulsa, OK
Posts: 280
Default

The bearings I have are the same size as the bushings, so they fit fine. The bearings must be the same thickness to fit right. If your bearings are thicker than the bushings, you have the wrong ones.
JWATT is offline   Reply With Quote
Old 05-26-2004, 02:17 PM   #8693
Tech Addict
 
Xtant3150c's Avatar
 
Join Date: Dec 2002
Location: Kaneohe, HI
Posts: 681
Trader Rating: 10 (100%+)
Default

Quote:
Originally posted by Simon K
Just wondering what sort of small fan to use to cool the motor(I've seen some cars setup like this).
Is a 12v 4 cm Ball bearing fan from a PC suitable or should I try a lower voltage(5v?) one of the same size?
That will work but I've heard that a lower voltage fan will work better, I think it's the rpm's or something?
Xtant3150c is offline   Reply With Quote
Old 05-26-2004, 02:32 PM   #8694
Tech Regular
 
SammyXp's Avatar
 
Join Date: Mar 2004
Location: Winston Salem, NC
Posts: 428
Default

Quote:
Originally posted by Xtant3150c
That will work but I've heard that a lower voltage fan will work better, I think it's the rpm's or something?
Right, the 12VDC PC fan will spin slower since the receiver only supplies ~4.8V. Even if you plug it directly into the battery, you've got 7.2V, tops.
Laptop fans are generally 5VDC fans and will run to full capacity, even on receiver power.
SammyXp is offline   Reply With Quote
Old 05-26-2004, 05:48 PM   #8695
Tech Elite
 
DaveW's Avatar
 
Join Date: Mar 2003
Location: Mobile, AL
Posts: 2,960
Trader Rating: 1 (100%+)
Default

Trinity supplies a 5VDC fan with their foam car stands for cooling the motor after a run. Buy it just for the fan and sell the foam stand to someone that may want it... or toss it as i did. (Trinity is tha devil lol) It is also the same fan found in the Trinity RealTime battery tray. Radio Shack only carries 12VDC fans in most stores, but online they sell 5VDC fans. By the time you pay/wait for shipping, you could have already gotten one from the hobby shop. Just a suggestion...

- DaveW
__________________
...you better run like im booger flickin...
DaveW is offline   Reply With Quote
Old 05-26-2004, 10:20 PM   #8696
Tech Addict
 
Simon K's Avatar
 
Join Date: Aug 2001
Location: Wellington, New Zealand
Posts: 573
Default

Thanks for the suggestions guys. I can get a 12v 4 cm fan easily enough but can't find any 5 volt ones at the local "Electronics shop"...should I try a specialist PC store to source the 5v ones from a laptop?
Simon K is offline   Reply With Quote
Old 05-27-2004, 01:18 AM   #8697
Tech Master
 
johnbull's Avatar
 
Join Date: Aug 2001
Location: Malta. G.C.
Posts: 1,762
Default

Hi friends. Greetings from Malta.

SIMON K.

If you can get a 5 volt fan it will rev more and blow more cool air. They do exist. I have just bought aload.

DAVE W.

I told you I was having occasional glitching problems with my set up too. Not all the time but an occasional glitch - just when you least expect it.

We have our end of season one hour endurance this Saturday and I really wanted to ensure that we don't have any such problems.

We did a dummy run yesterday with both team TC3s and didn't have a spot of bother with either car in over an hour's running.

What I did was I installed one of the Yokomo receiver capacitors, part # YTSTS and it really seemed to cure it. Not a trace of glitching anywhere.

Worth a try.

Regards

Joe from sunny Malta.
johnbull is offline   Reply With Quote
Old 05-27-2004, 06:00 AM   #8698
Tech Elite
 
DaveW's Avatar
 
Join Date: Mar 2003
Location: Mobile, AL
Posts: 2,960
Trader Rating: 1 (100%+)
Default

JOHNBULL: Thanks for the tip! I will hop on that receiver cap right away!

A close friend of mine sent me a brand new GM SX12 Purple speedo with heat sink. He suggested it as a cure for my glitch. The thing is so friggen tiny. I looked online and there doesnt seem to be alot of info on this speedo, and i dont read German to well. Can anyone help me out? Anything would be appreciated.

- DaveW
__________________
...you better run like im booger flickin...
DaveW is offline   Reply With Quote
Old 05-27-2004, 10:28 AM   #8699
Tech Addict
 
Join Date: May 2004
Location: Hawaii
Posts: 690
Trader Rating: 30 (100%+)
Default

Regarding the bearings in the lightweight diffs, I had to dremel some of the material out of the diff housing because the bearings that came with the original TC3 kit are slightly thicker and do not allow you to tighten the diff all the way. If you found bearings that drop right in, then good for you and no dremelling necessary.

Regarding those looking for fans, my LHS has a Reedy TC3 motor clip-on heatsink with a fan mounted onto it. You can also buy replacement fans with the part number listed in the instructions. Sorry, I don't have the part number, but I do know that it is there because the owner and I were wondering how to get low voltage fans at that size.
wrxnfx is offline   Reply With Quote
Old 05-27-2004, 12:59 PM   #8700
Tech Initiate
 
Join Date: Aug 2001
Posts: 36
Default Penguin r/c P5500 Performance Chassis for the TC3

Penguin r/c is pleased to announce the release of the P5500 Performance Chassis for the TC3.

This chassis has proven race results capturing the 2004 ROAR Region 3 Championships in both Modified and Stock.

for more information regarding this chassis as well as ordering information please visit..

http://www.penguinrc.com/products/associated/p5500.html

If there are any questions please email us at support@penguinrc.com

Thank you

Brion Sohn
President
Penguin r/c
Penguin r/c is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
New to the forum mig rod Electric Off-Road 1 01-05-2008 04:23 PM
hi i need help and im new to the forum racer4 Rookie Zone 4 01-21-2007 01:37 PM
Why is this forum listed under the On Road Forum? sport10 Onroad Nitro Engine Zone 0 01-11-2007 07:06 AM
Forum Changes... futureal Wisconsin & Illinois Racing 3 10-28-2002 08:26 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 09:59 PM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net