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-   -   Throttle servo will open carb but refuses to brake. (https://www.rctech.net/forum/nitro-off-road/307970-throttle-servo-will-open-carb-but-refuses-brake.html)

sokar 06-28-2009 11:17 AM

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.

cary 06-28-2009 11:21 AM

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

sokar 06-28-2009 11:24 AM


Originally Posted by cary (Post 5995734)
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?

butch man 06-28-2009 11:27 AM

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 06-28-2009 11:28 AM

I gotta learn to type faster you beat my post.

Chris__RC 06-28-2009 11:35 AM


Originally Posted by sokar (Post 5995739)
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.

sokar 06-28-2009 12:08 PM


Originally Posted by Chris__RC (Post 5995772)
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.

howtowakeakar 06-28-2009 12:18 PM

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.

butch man 06-28-2009 12:27 PM

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.

JUD 06-28-2009 12:49 PM


Originally Posted by butch man (Post 5995886)
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!!!:nod: These cars are not made to run hours at a time. Maintenance is key. Get a good humppack and call it a day.

sokar 06-28-2009 12:56 PM

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

How much would a better battery pack cost me?

cary 06-28-2009 01:08 PM

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


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