R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro Off-Road

Reply
 
Thread Tools Search this Thread
Old 11-06-2004, 11:41 PM   #1456
Tech Prophet
 
Casper's Avatar
 
Join Date: Aug 2004
Location: Orange, Ca
Posts: 17,664
Trader Rating: 33 (100%+)
Default

jbrow1-- Things get usually get hot faster when you over gear. How long are you running the car with an 11T motor. Are you running it in grass or in dirt or on the street? High resistance terrain like grass makes the motor pull a lot more amps then on say dirt which will heat everything up a bunch. Also running for more then 6 min or so is usally not good. Most all motors I know of get pretty hot in this time frame and running longer just gets them hotter. You can try cutting scoops to the ESC to cool it down but it should not need that if it is rated for a 8T. Does it have heat sinks and if so are they installed? The motor will just get hot but since you are a gas guy and should have a temp gun it should not come off more then about 170 ish. Much hotter then that and the brushes and comm take a real beating.
Casper is offline   Reply With Quote
Old 11-07-2004, 07:40 AM   #1457
Tech Elite
 
Join Date: Oct 2004
Location: Michigan
Posts: 3,296
Trader Rating: 27 (100%+)
Default

Casper, thanks for the info. I really didn't think it was overgeared b/c the thing just flies! But then again if I change the gear it may be more controllable acceleration. I thought the powerful motor was probably just pulling alot of juice. Mostly happens after I'm running for a bit, and then go full throttle down the straights. Running on dirt. Run it for around 5 minutes or so. I'll try some different gears. Just recently got the car in a trade. I'll have to temp it next times. Oh yeah, all heat sinks are on the speed control.
jbrow1 is offline   Reply With Quote
Old 11-07-2004, 09:50 AM   #1458
Tech Prophet
 
Casper's Avatar
 
Join Date: Aug 2004
Location: Orange, Ca
Posts: 17,664
Trader Rating: 33 (100%+)
Default

I have not run a B3 so I am not too up on proper gearing but I went to AE web site and saw and old setup sheet from Billy Easton where he ran a 10X4 motor geared at 19/81 at an old reedy race (2001). I would gear around 19-20 for your 11T. I am not sure what you are at right now but again things will naturally get hot but should not shut down.
Casper is offline   Reply With Quote
Old 11-07-2004, 11:03 AM   #1459
Tech Elite
 
Join Date: Oct 2004
Location: Michigan
Posts: 3,296
Trader Rating: 27 (100%+)
Default

Thanks for looking that up for me. Gonna have to try that. Thought it was to hard at take off anyhow.
jbrow1 is offline   Reply With Quote
Old 11-07-2004, 11:23 AM   #1460
Tech Prophet
 
Casper's Avatar
 
Join Date: Aug 2004
Location: Orange, Ca
Posts: 17,664
Trader Rating: 33 (100%+)
Default

What were you geared at?
Casper is offline   Reply With Quote
Old 11-07-2004, 01:24 PM   #1461
Tech Elite
 
Join Date: Oct 2004
Location: Michigan
Posts: 3,296
Trader Rating: 27 (100%+)
Default

25pinion, 81 spur. Wouldn't think that would be the cause I guess, not if guys are running 19 and 20. But then again, they are probably running much better speed controls. This speedo is just a Duratrax one the guy got off ebay before he sent it to me. I'll be getting a different motor probably if I end up racing it. Probably just stay my practice car, b/c I just got my B4 together, and can't wait to run it. Oh yeah, the spur gear is major chewed up, and the pinion pretty sloppy also. Could be causing to much friction. And how much back and forth play should there be in the armature when motor is assembled. I think it needs another shim in it.

I'm a gas guy, but got the buggies to improve my driving a bit. Plus running two classes will give me some more track time during race days.
jbrow1 is offline   Reply With Quote
Old 11-07-2004, 01:48 PM   #1462
Tech Prophet
 
Casper's Avatar
 
Join Date: Aug 2004
Location: Orange, Ca
Posts: 17,664
Trader Rating: 33 (100%+)
Default

25/81 is way too tall a gearing for the 11 turn motor. Gear that thing down!! With that tall of a gearing you are pulling too many amps and this is why things are overheating! Gearing is important when running electric! Also replace the spur if it is chewed up as that extra fiction will cause a higher amp load also.
Casper is offline   Reply With Quote
Old 11-07-2004, 02:25 PM   #1463
Tech Elite
 
Join Date: Oct 2004
Location: Michigan
Posts: 3,296
Trader Rating: 27 (100%+)
Default

Oh, I didn't even think of to high of gearing causing heat problems. Good thing to know. : )
Guess that's why it only did it after the straightaways mostly.

I've got a bunch of gears, so I'll play around with the ratios.
Thax!

Oh yeah, how much play should there be in the armature? Not as in wobble (slop), but from end to end?
jbrow1 is offline   Reply With Quote
Old 11-07-2004, 07:13 PM   #1464
Tech Prophet
 
Casper's Avatar
 
Join Date: Aug 2004
Location: Orange, Ca
Posts: 17,664
Trader Rating: 33 (100%+)
Default

There should not be a ton of slop but there should be "some". Also you want to make sure the shims are in there so the arm finds it's magnetic center. Take all the shims out and spin the arm in the can. You will notice the arm will want to "float" somewhere in the middle of the can and not next to one of the bearings. Shim the arm so you maintain this normal centering but take out the excessive play. I hope all that made sense.
Casper is offline   Reply With Quote
Old 11-07-2004, 08:03 PM   #1465
Tech Elite
 
Join Date: Oct 2004
Location: Michigan
Posts: 3,296
Trader Rating: 27 (100%+)
Default

Gotcha.
jbrow1 is offline   Reply With Quote
Old 11-07-2004, 10:13 PM   #1466
Tech Elite
 
Aaron Waldron's Avatar
 
Join Date: Apr 2004
Location: Escondido, CA
Posts: 3,720
Default

Words can't express how much fun this weekend was..Mexico is soooo much fun!

Trinity/Losi swept the gas truck class too. Not a bad weekend!
__________________
Aaron Waldron - LiveRC
www.liverc.com
Aaron Waldron is offline   Reply With Quote
Old 11-08-2004, 07:05 AM   #1467
Tech Elite
 
mafiaracers's Avatar
 
Join Date: Mar 2004
Location: West Linn, Oregon
Posts: 3,759
Trader Rating: 22 (100%+)
Send a message via AIM to mafiaracers Send a message via MSN to mafiaracers
Default

But did Aaron sweep the gas class? I'm sure you did great!


you've got a pm.
__________________
Chris Woods

MAFIA MOTORSPORTS
http://www.rctech.net/forum/r-c-items-sale-trade/168239-pit-board.html

TEAM WAVE
www.teamwaveonline.com

TQ Racing Wire
www.tqracing.com
mafiaracers is offline   Reply With Quote
Old 11-08-2004, 07:11 AM   #1468
Tech Elite
 
warpig's Avatar
 
Join Date: Feb 2004
Location: Cornfield, Nebraska
Posts: 2,862
Trader Rating: 7 (100%+)
Default

what was the track like aaron? is there a website?
warpig is offline   Reply With Quote
Old 11-08-2004, 07:19 AM   #1469
Tech Master
 
Joe Pillars's Avatar
 
Join Date: Jun 2004
Location: Portland, OR
Posts: 1,008
Default

What happens in Mexico STAYS in Mexico! HaHa!!
__________________
Kyosho America, Team Orion, Peak Racing, AKA, KO Propo, DiBrino Designs, JTP, RCE, Rockstar Energy Drink, www.thebigrc.com, Portland R/C Raceway (www.prcr1.blogspot.com)
Joe Pillars is offline   Reply With Quote
Old 11-08-2004, 08:45 AM   #1470
Tech Elite
 
Aaron Waldron's Avatar
 
Join Date: Apr 2004
Location: Escondido, CA
Posts: 3,720
Default

mafia - I qualified 4th and finished 3rd..I had a few issues here and there but it wasn't bad.

piggy - The track was made of beach sand and a small triangular shape..but it was a total blast. I think www.santamonicaracepark.com is their website.

J-Freakin'-P! Last weekend will be forever immortalized in the minds of everyone that was there to enjoy the entertainment..hahahaha.

Most fun I've ever had, EVER.
__________________
Aaron Waldron - LiveRC
www.liverc.com
Aaron Waldron is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Loaded Serpent 710. Aaron Burans Previous Car! NitroMaxx3.3 R/C Items: For Sale/Trade 2 05-03-2008 05:42 AM
Aaron Bomia is an Excellent Seller! Luckyman4 Buyer/Seller dispute and Feedback discussion forum 0 06-25-2004 09:23 AM
AARON BOMIA = Great Trader Mart42 Buyer/Seller dispute and Feedback discussion forum 1 02-05-2004 08:15 AM



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 07:47 PM.


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