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-   -   Anybody use high torque servos for throttle? (https://www.rcuniverse.com/forum/rc-1-8th-scale-buggies-244/6446256-anybody-use-high-torque-servos-throttle.html)

JRX2ER 10-03-2007 07:07 PM

Anybody use high torque servos for throttle?
 
It seems that most people run high speed servos for the throttle/brake and high torque for steering. My issue is that I don't seem to have enough braking force on my ravager. Granted it's the stock RTR radio, and perhaps a 5 cell reciever pack would help, but right now I can't adjust the brake bias without going to the extremes. If it's biased to the front, it has enough servo torque to lock up the front but barely touch the back. If I adjust them to be exactly the same, it doesn't have much brake overall. It's like the servo just doesn't have the balls to crank down on both at the same time with any force. My other though is that another radio that allows you to adjust the throw on the brake would help. More travel on the brake side. I did that on my rc10gt that has a better radio. Thoughts?
I'm thinking about upgrading to a better FM or spectrum radio anyway because of glitching, so maybe this is a pointless discussion.

hrdcoreglf 10-03-2007 07:42 PM

RE: Anybody use high torque servos for throttle?
 
I always say good transit speed high torque for steering, good torque high transit speed for steering. I use the futaba 3 pm 2.4 gig spectrum transmitter. It is very adjustable when it comes to steering and throttle trims. 10 model memory as well. just one idea. I also own 2 ravagers and it just takes a little time to get used to adjusting the brakes. If you can post a picture of your throttle / brake set up/ linkage. might be able to help

JRX2ER 10-03-2007 09:11 PM

RE: Anybody use high torque servos for throttle?
 
It'd be nice if the brake linkage had a turnbuckle, instead of just the moveable collar. unless you mark where you started from, it's easy to loosen the collar and have it move before you try to adjust. I still think a stronger servo would help. These spectrum radios are just soo crazy expensive. I know they're good, but spendy. I may just find myself a decent FM and invest in some good digital servos.

Uglysteve 10-03-2007 09:20 PM

RE: Anybody use high torque servos for throttle?
 
i run 2 x DS1015's on my hyper. One for steering and one for brake. I love it.

JRX2ER 10-03-2007 09:27 PM

RE: Anybody use high torque servos for throttle?
 


ORIGINAL: broncbuster

i run 2 x DS1015's on my hyper. One for steering and one for brake. I love it.
wow.. Just looked up the stats on that and they're pretty impressive. I was going to get a hitec analog high torque servo for maybe $10 less. I'll have to check them out.

rammol 10-03-2007 09:31 PM

RE: Anybody use high torque servos for throttle?
 
i run a htec 645mg for my throttle brake and a futaba high speed servo for the steering.

JRX2ER 10-03-2007 10:00 PM

RE: Anybody use high torque servos for throttle?
 


ORIGINAL: rammol

i run a htec 645mg for my throttle brake and a futaba high speed servo for the steering.
That seems opposite from what most people are doing. Isn't the 645 a lower end high torque?

ecocav04 10-03-2007 10:04 PM

RE: Anybody use high torque servos for throttle?
 
in my buggy i ran a 9000s for steering and 9000t for throttle and brake. since i got my truggy i now run airtronics servos in my buggy and i have the 9000s for throttle/break and the 9000t for steering

46u 10-03-2007 10:18 PM

RE: Anybody use high torque servos for throttle?
 


ORIGINAL: JRX2ER



ORIGINAL: rammol

i run a htec 645mg for my throttle brake and a futaba high speed servo for the steering.
That seems opposite from what most people are doing. Isn't the 645 a lower end high torque?

Not only that but the 645 is SLOW!!!!!!!!!!!!!

silverj 10-04-2007 12:02 AM

RE: Anybody use high torque servos for throttle?
 
1 Attachment(s)
I also run a HS-645G for my Ravager's throttle and brake. It used to coast to a stop and now will lock up all four if adjusted to that point! Ihavent gotten around to changing out the steer servo yet but it's a must.

rmesa1 10-04-2007 12:09 AM

RE: Anybody use high torque servos for throttle?
 
You may want to look into a new radio if you are upgrading your servo. The stock radio has no end point adjustment that can lead to premature failure for the servo

46u 10-04-2007 12:29 AM

RE: Anybody use high torque servos for throttle?
 


ORIGINAL: silverj

I also run a HS-645G for my Ravager's throttle and brake. It used to coast to a stop and now will lock up all four if adjusted to that point! Ihavent gotten around to changing out the steer servo yet but it's a must.

If you ever run a faster servo even on the throttle and brake you will never go back to the SLOW 645! I ran a 645 and until I ran faster servos I never realized how slow the 645 really is.

haasjj 10-04-2007 02:20 AM

RE: Anybody use high torque servos for throttle?
 
JRX2 if you want to run a high torque servo on your throttle n brake you can, but I would recomend a JR9000s for that with a 5 cell reciever pack and a good radio. I'm running this setup on both my Turmoil and my 8ight T and have no problems locking up the brakes, but I have my radio setup so it won't lock up.

Force4x4 10-04-2007 03:21 AM

RE: Anybody use high torque servos for throttle?
 
I run a Futaba S9451 for throttle/brakes and a Futaba S9351 for steering.

JRX2ER 10-04-2007 08:00 AM

RE: Anybody use high torque servos for throttle?
 


ORIGINAL: rmesa1

You may want to look into a new radio if you are upgrading your servo. The stock radio has no end point adjustment that can lead to premature failure for the servo
yeah, that's ONE of my dislikes of the stocker. I also have a t2phka which has low and high epa for steering and throttle. I may swap to that and try some better servos. I don't race (yet) with this thing, and it's never given me any issues with interference/glitching.

JRX2ER 10-04-2007 08:02 AM

RE: Anybody use high torque servos for throttle?
 


ORIGINAL: silverj

I also run a HS-645G for my Ravager's throttle and brake. It used to coast to a stop and now will lock up all four if adjusted to that point! Ihavent gotten around to changing out the steer servo yet but it's a must.
just curious, but does that spring on your throttle servo horn act as a failsafe?

vti-chris 10-04-2007 08:17 AM

RE: Anybody use high torque servos for throttle?
 
For steering: 150-200oz torque / .10-.15sec speed
For throttle: 100-130oz-torque / .10-.13sec speed

I use hitec 5985 172oz/.13sec for steering
Ko propo 2001 FET 100oz/ 0.08sec for throttle.

Just a note: the ko seems to be the same speed with the hitec when on the car...this is because it doesn't spin freely any more...it's hocked up on the brakes and throttle.

In my opinion torque is more important but make sure you are lower than .15 in speed.

Da Smak 10-04-2007 03:37 PM

RE: Anybody use high torque servos for throttle?
 


ORIGINAL: JRX2ER



ORIGINAL: silverj

I also run a HS-645G for my Ravager's throttle and brake. It used to coast to a stop and now will lock up all four if adjusted to that point! Ihavent gotten around to changing out the steer servo yet but it's a must.
just curious, but does that spring on your throttle servo horn act as a failsafe?
It will do in the event of total electrical power failure, as long as the spring is able to pull the servo horn round, they are more useful than an electrical one if you lose the battery, but you don't find out the batts dead until the car just sits still.

JRX2ER 10-04-2007 04:13 PM

RE: Anybody use high torque servos for throttle?
 


ORIGINAL: Da Smak



ORIGINAL: JRX2ER



ORIGINAL: silverj

I also run a HS-645G for my Ravager's throttle and brake. It used to coast to a stop and now will lock up all four if adjusted to that point! Ihavent gotten around to changing out the steer servo yet but it's a must.
just curious, but does that spring on your throttle servo horn act as a failsafe?
It will do in the event of total electrical power failure, as long as the spring is able to pull the servo horn round, they are more useful than an electrical one if you lose the battery, but you don't find out the batts dead until the car just sits still.
I think I'm more concerned that my receiver's battery would fail than my transmitter, since that one at least has a meter on it. Having a mechanical failsafe (ie;spring) seems like a better idea. I know my current stock cheapie servos don't hold position when they lose signal from the transmitter or lose power from the reciever pack, so a spring would work, but I don't know if a new digital HS or HT servo would refuse to move when power is lost.
Do any of the newer radios monitor reciever battery strength?

46u 10-04-2007 04:47 PM

RE: Anybody use high torque servos for throttle?
 
Yes the React monitors both the TX and RX as well as much more. But I still run a spring as sanction racing requires it.


rammol 10-04-2007 08:00 PM

RE: Anybody use high torque servos for throttle?
 
i am thinking of changing my servos the other way around. thanks guuys for all of your help. lol

RcRacer37E 10-04-2007 08:24 PM

RE: Anybody use high torque servos for throttle?
 
In running airtronics 94758 servo for the gas/brake and a jr 9000t for steering. The best thing you can do for any servo is going to lipo pack. I dropped a 2000 mah with a 5amp regulator and it last all day without a charge. The servos stay at the .06 speed (gas/brake) and makes every run feel the same.

JRX2ER 11-24-2007 12:06 PM

RE: Anybody use high torque servos for throttle?
 
I know this is an old thread, but I finally got my new servos installed the other day (both were reverse direction from what I took out, so the first thing I did was strip my servo horn, need to get some AL ones), and after some sorting I have to say it's a phenomenal difference. Especially the stronger throttle/brake one. It's a hitec HS-965MG, and the brakes finally work as intended. It has a ton of stopping power. the ACE DS1313 is a huge improvement for steering too. Definitely worth doing.

Uglysteve 12-24-2007 01:51 AM

RE: Anybody use high torque servos for throttle?
 
Good choice...I use that 965 on the throttle on my revo. Fast little bugger.

vulpina 12-24-2007 07:15 PM

RE: Anybody use high torque servos for throttle?
 
iam runing 2 futaba bls451 , crazy fast and strong , they turn very easy on power off so i have a rubber on the carb to the servo horn to bring it back if something goes wrong :)


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