R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 07-21-2009, 01:22 AM   #1
Tech Apprentice
 
fr0z3nfr0g's Avatar
 
Join Date: Apr 2009
Location: Pennsylvania
Posts: 53
Trader Rating: 1 (100%+)
Default so can anybody help

i just put a slydr esc and 8.5 motor in my b4. just cause they didnt have a gtb system rmf that wasnt spread spectrum. but i have what seems like an interference problem. it does it for both 27 and 75 Mhz. its when i hit the throttle sometimes it turns sharp right and i have no control till it feels like stopping half a second later. and also when i hit the gas, slowly, it jumps full throttle for a split second then back down. i dunno weather or not i should try my friends 2.4ghz system in it and see if it goes away. i even twisted the 3 wires goin to the motor to help cut down that noise. i just need some opinions.
__________________
RC10gt with O.S. 18 cvr

RC10B4 with Novak slydr 8.5 brushless system and a 2s 6000mAh smc lipo!
fr0z3nfr0g is offline   Reply With Quote
Old 07-21-2009, 01:52 AM   #2
Tech Elite
 
sosidge's Avatar
 
Join Date: Dec 2001
Location: Bristol, UK
Posts: 3,865
Default

Sounds like it might be related to voltage drop on power.

How are your batteries? If they are old or poor quality they may be struggling to give enough voltage when the extra power of the brushless comes in.

Also give all your wiring a good going over to check for damage and make sure the antenna runs up through the tube.
sosidge is offline   Reply With Quote
Old 07-21-2009, 02:08 AM   #3
Tech Apprentice
 
fr0z3nfr0g's Avatar
 
Join Date: Apr 2009
Location: Pennsylvania
Posts: 53
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by sosidge View Post
Sounds like it might be related to voltage drop on power.

How are your batteries? If they are old or poor quality they may be struggling to give enough voltage when the extra power of the brushless comes in.

Also give all your wiring a good going over to check for damage and make sure the antenna runs up through the tube.
i have. the batteries are pretty bad.. maybe when i get my lipo charged (godda borrow friends lipo charger lol) then it will be better? cause i was using really bad 3300 mah nimh pack. could that voltage drop really be the problem?
__________________
RC10gt with O.S. 18 cvr

RC10B4 with Novak slydr 8.5 brushless system and a 2s 6000mAh smc lipo!
fr0z3nfr0g is offline   Reply With Quote
Old 07-21-2009, 09:32 AM   #4
Tech Apprentice
 
fr0z3nfr0g's Avatar
 
Join Date: Apr 2009
Location: Pennsylvania
Posts: 53
Trader Rating: 1 (100%+)
Default

fully charged the nimh 3300 pack. the voltage drop under load is only .2 - .4 volts so it is at about 6.8 - 7 volts under load. i really dont know what else it could be
__________________
RC10gt with O.S. 18 cvr

RC10B4 with Novak slydr 8.5 brushless system and a 2s 6000mAh smc lipo!
fr0z3nfr0g is offline   Reply With Quote
Old 07-28-2009, 02:54 AM   #5
Tech Apprentice
 
Join Date: Apr 2009
Posts: 96
Default

Man---- I had the same exact problem with a new Havoc 8.5. Turns out this was caused by my steering servo. I had read somewhere certain servos send backfeed current that causes a bec glitch and has nothing to do with radio. I put a different brand servo in my Losi MF1 and all is well now.
speedster1919 is offline   Reply With Quote
Old 07-28-2009, 07:43 AM   #6
Tech Adept
 
Join Date: May 2009
Posts: 106
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by sosidge View Post
Sounds like it might be related to voltage drop on power.

How are your batteries? If they are old or poor quality they may be struggling to give enough voltage when the extra power of the brushless comes in.

Also give all your wiring a good going over to check for damage and make sure the antenna runs up through the tube.
I had a very similar problem when I put a new ESC in my ride too. It was a voltage drop. I was running NiMh 4200's and every time I got on the throttle the car would pull right and cut out for 10 to 20 seconds.
Turned out there was a setting on the ESC for either NiMh or lipo and it was set as default to lipo. This caused the ESC to think it had more power available and when it drew the power the problem occurred.

After I got some help from the guys at the track and changed the setting (20 seconds to fix) I haven't had this issue since.

Hope it helps.
Tiger72 is offline   Reply With Quote
Old 07-28-2009, 12:25 PM   #7
Tech Apprentice
 
fr0z3nfr0g's Avatar
 
Join Date: Apr 2009
Location: Pennsylvania
Posts: 53
Trader Rating: 1 (100%+)
Default

i dont think this one has different settings, but ill deffiniatly check it out when i get the new one, so i godda see if theres a lipo setting, and if the steering servo has anything to do with it!! thanks
__________________
RC10gt with O.S. 18 cvr

RC10B4 with Novak slydr 8.5 brushless system and a 2s 6000mAh smc lipo!
fr0z3nfr0g is offline   Reply With Quote
Old 07-28-2009, 08:28 PM   #8
Tech Adept
 
Join Date: May 2009
Posts: 106
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by fr0z3nfr0g View Post
i don't think this one has different settings, but ill definitely check it out when i get the new one, so i godda see if theres a lipo setting, and if the steering servo has anything to do with it!! thanks
Check for a Lipo setting. But it's not whether or not the steering servo has anything to do w/ it. It's the fact that (for mine) with the setting wrong the ESC would dump too much power and cause a loss of power to the receiver. That's what will cause an erratic sudden turn and loss of throttle.
Tiger72 is offline   Reply With Quote
Old 07-28-2009, 09:07 PM   #9
Tech Apprentice
 
fr0z3nfr0g's Avatar
 
Join Date: Apr 2009
Location: Pennsylvania
Posts: 53
Trader Rating: 1 (100%+)
Default

i read the manual, nothing about different settings. but i think ill try the servo. cause the car would just full throttle and turn, not like it turned off. maybe just the reciever turned off
__________________
RC10gt with O.S. 18 cvr

RC10B4 with Novak slydr 8.5 brushless system and a 2s 6000mAh smc lipo!
fr0z3nfr0g is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Castle Hill RC Onroad TJ Australian Racing 16039 09-01-2017 01:12 AM
Team Losi JRXS Type-R Andrew Gray Electric On-Road 13454 07-11-2017 08:26 PM
Grande Prairie Model Racers Association WheelNut Canadian R/C Scene 19805 06-10-2017 02:40 PM
Yokomo MR-4TC SD Cat Electric On-Road 15814 04-18-2014 09:15 AM
Kyosho SP2 WC Edition Shocker Nitro Off-Road 300 08-30-2011 09:17 AM
Fact or Fiction: One-Ways and the year 2003 Cracker78 Electric On-Road 57 09-17-2002 09:33 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 06:35 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