Go Back  R/C Tech Forums > General Forums > Nitro Off-Road
Throttle servo will open carb but refuses to brake. >

Throttle servo will open carb but refuses to brake.

Throttle servo will open carb but refuses to brake.

Old 06-28-2009, 11:17 AM
  #1  
Tech Adept
Thread Starter
 
sokar's Avatar
 
Join Date: May 2009
Posts: 160
Default Throttle servo will open carb but refuses to brake.

My throttle servo will control the throttle smoothly, but when I push the trigger forward to break it barely moves at all, and there is only a slight resistance in the wheels. The car is pretty much brand new, and its and OFNA Hyper 8 rtr kit.
sokar is offline  
Old 06-28-2009, 11:21 AM
  #2  
Tech Master
iTrader: (67)
 
cary's Avatar
 
Join Date: Mar 2009
Location: NorCal
Posts: 1,914
Trader Rating: 67 (100%+)
Default

make sure you have a full charge in the rx battery pack also check
the EPA is set right sounds like a dead rx battery
cary is offline  
Old 06-28-2009, 11:24 AM
  #3  
Tech Adept
Thread Starter
 
sokar's Avatar
 
Join Date: May 2009
Posts: 160
Default

Originally Posted by cary View Post
make sure you have a full charge in the rx battery pack also check
the EPA is set right sounds like a dead rx battery
The battery was low. I'm charging a few AAs and will try again soon.

If that doesn't work, any other suggestions?
sokar is offline  
Old 06-28-2009, 11:27 AM
  #4  
Tech Master
 
Join Date: Aug 2006
Location: Oceanside CA
Posts: 1,075
Default

If your end point adjustment is good & batterys are good check the servo. RTRs are not known for the best servos & sometimes the plastic servo splines will strip on the servo horn.Sounds like low voltage in batts though,if you can check a rechargable batt should be at 7V or above right after charging.
butch man is offline  
Old 06-28-2009, 11:28 AM
  #5  
Tech Master
 
Join Date: Aug 2006
Location: Oceanside CA
Posts: 1,075
Default

I gotta learn to type faster you beat my post.
butch man is offline  
Old 06-28-2009, 11:35 AM
  #6  
Tech Master
iTrader: (7)
 
Join Date: May 2008
Posts: 1,771
Trader Rating: 7 (100%+)
Default

Originally Posted by sokar View Post
The battery was low. I'm charging a few AAs and will try again soon.

If that doesn't work, any other suggestions?
Get a rechargeable 5 cell battery. That will give you more speed and torque from the servos.
Chris__RC is offline  
Old 06-28-2009, 12:08 PM
  #7  
Tech Adept
Thread Starter
 
sokar's Avatar
 
Join Date: May 2009
Posts: 160
Default

Originally Posted by Chris__RC View Post
Get a rechargeable 5 cell battery. That will give you more speed and torque from the servos.
Possibly. I'm thinking of a Lipo reciever pack just because Rechargeable AAs have really low voltage and run out within a day or two of driving. I'll be looking into those assuming they aren't too expensive.
sokar is offline  
Old 06-28-2009, 12:18 PM
  #8  
Tech Fanatic
iTrader: (4)
 
Join Date: Jan 2009
Location: Connecticut
Posts: 775
Trader Rating: 4 (100%+)
Default

Don't forget that with a Lipo pack you would almost certainly need a regulator.

Sickman makes excellent NiMh receiver packs, and the 2500 mah lasts at least a week of bashing for me, and I run about an hour a day. And according to my Nomadio React, it never even comes close to dying.
howtowakeakar is offline  
Old 06-28-2009, 12:27 PM
  #9  
Tech Master
 
Join Date: Aug 2006
Location: Oceanside CA
Posts: 1,075
Default

A couple hours MAX is all you'll get out of the standard 2/3A rechargable reciever packs. 4-ish hours MAX from the larger AA rechargable packs & normal voltage for all nimh rechargable batts is 1.2V per cell not 1.5 like alkaline batts.Lipo is a different story with different concerns. You might want to stick with nimh for a while till your ready to deal with the other things that go along with lipo.

Just going out & running till your batts die is not the way this hobby works. Expect to charge every day before you take the car out.That is the habbit that all RC racers use. 9lbs car @ 35mph & batts die = more problems than you want to deal with.
butch man is offline  
Old 06-28-2009, 12:49 PM
  #10  
JUD
Tech Master
iTrader: (4)
 
JUD's Avatar
 
Join Date: Mar 2009
Location: Delaware
Posts: 1,342
Trader Rating: 4 (100%+)
Default

Originally Posted by butch man View Post
A couple hours MAX is all you'll get out of the standard 2/3A rechargable reciever packs. 4-ish hours MAX from the larger AA rechargable packs & normal voltage for all nimh rechargable batts is 1.2V per cell not 1.5 like alkaline batts.Lipo is a different story with different concerns. You might want to stick with nimh for a while till your ready to deal with the other things that go along with lipo.

Just going out & running till your batts die is not the way this hobby works. Expect to charge every day before you take the car out.That is the habbit that all RC racers use. 9lbs car @ 35mph & batts die = more problems than you want to deal with.
Very well put!!! These cars are not made to run hours at a time. Maintenance is key. Get a good humppack and call it a day.
JUD is offline  
Old 06-28-2009, 12:56 PM
  #11  
Tech Adept
Thread Starter
 
sokar's Avatar
 
Join Date: May 2009
Posts: 160
Default

I recharged the pack and its doing better. Its not excellent but its getting there.

How much would a better battery pack cost me?
sokar is offline  
Old 06-28-2009, 01:08 PM
  #12  
Tech Master
iTrader: (67)
 
cary's Avatar
 
Join Date: Mar 2009
Location: NorCal
Posts: 1,914
Trader Rating: 67 (100%+)
Default

a good pack will run around $26+ but you may need a charger
if you do not have one and they will start at like $40 and up
you will have to thing how far you may go in this hobby
and consider all options
cary is offline  

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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.