Throttle servo speed?
 

whats a good speed for a throttle servo?

i am planning on using my Savox 1283 for my steering, and i have a spare Savox 1257 i was planning on using for my throttle if it will work, that way i don't have to spend any more money


here are the specs on the 1257:


Speed @ 6.0V: 0.07 sec/60°
Torque @ 6.0V: 138 oz-in / 10 kg-cm
Weight: 52.4g
Bearing: Dual
Type: Standard
Gear: Titanium and Aluminum
Case: Aluminum Heatsink
Output Shaft: 25T Spline (Futaba)
Case Size (LxWxH): 40.3x20x37.2mm

Delete all those specs and never, ever look at servo speeds and torque ever agian. Plenty of experts around here for RC racing and plenty of experts around for airplanes as well. The specs are usually lies.

I run what the fast guys run, and what never, ever breaks down. If it works it works, just ask what works.

But if we do look at speeds to help us guess if a servo is any good, the specs you listed seem too fast and too weak. I'd ratrher have a slightly slower torqier throttle servo. Seems easier on my battery and runs cooler.

I run Hitec 7955's straight on 8.4v. I've tried speedier servos, but moving out a hole on the Hitec servo arm deos the same thing. I really haven't found the need for anything faster. Just more understeer from washing the front end out if I'm not smooth with steering. You may want the speed geared version of the 7955 for throttle, but I just run another 7955 so that I can swap servos between cars in a pinch.

thats plenty for throttle..most guys around here run the 1258 SAvox on throttle and that is rated at 0.13 i think (not sure). Savox servos comply with the criteria stipulated in the above post....they last forever..im on my 3rd buggy ...same set of servos...but then you would know since you run them too;) my cousin had futaba BLS servos in his last buggy..and they "had" to be good since they were stupidly expensive....well they are in the trash now:lol:...the steering servo went first and then the throttle one....all while watching my "cheap" savox's keep on going like the day they were new. needless to say he is a believer now :cool:

your savox is ok.Only change if they get broken.
If they do go for torque not speed

I have seen every brand of servos out there fail. This weekend I killed a 7955 hitec, it's not a shock, it's only three years old now. I also saw two savox's fail this weekend, they were the 1267 and a 1268.

My point is everyone will say mine last forever and I saw this one fail on a friends, so never buy that. It's complete BS, why? Because how do you know the "friend" had his endpoints set or the fact that maybe it was a freak failure. You dont.

You ask since I had a hitec 7955 fail will I buy a new one? Dang right I would. They simply rock, I'll send this burnt one in to hitec, wait a week or two to get it back and run it for a few more years.

For the record run nothing with under 200oz of torque for any servo in a 1/8 scale vehicle, set the endpoints correctly and you should be set.

The servos you already have should work fine. Esp if you are budget minded.

Im running 1256 for steering and 1258 for thr/brk in both buggy and truggy.

Torque seems to be top priority over speed ratings for steering in 1/8 off road. my 1256's do fine and your 1283 (based on specs) should be a beast.

I have 1257s in my 1/10 buggies and i think it would do just fine for thr/brk. the 1257 is fast enough that you should be able to move your brake linkage inwards a hole on the servo horn for some less strain on the servo.

I havent had one of my savox fail me (yet). Everything will wear out in time though. and there are some lemons and flukes out there. If you want to keep some jingle in your pocket, use what you have ;)

Super Fast throttle servo's are OVER Rated And NOT needed what so ever.

For the record there is not a servo built today at any price that will not fail eventually. think about what we put these servos through with off road racing. Even shimmed and set correctly they will all succumb to the rigors of the dirt, grease, crashing, vibrations, landings, cleaning, and heat involved with off road racing. The most important thing to consider nowadays is what happens after your servo fails? That is why I choose Hitech. I have never had them tell me that the servo cannot be repaired or replaced and never once in 11 years have they ever asked me for money, not even for return shipping..Hitech for life! ;)

just for the record i didn't mean to bash a certain brand of servos...just sharing an experience and relating to the OP's budget concerns...as ALOT of people believe most expensive = best...which is crap IMO.

This is very interesting. I was out of the game for about 15 years (as of 1 1/2-2 years ago) and went with what i thought was "bang for the buck." The savox have not failed in that dept. at all! But if i do stick with the rc game, I will be highly considering the hitec for this reason!

I still recommend using what you have, for the budget minded. Unless there is doubt that it will fail and end up costing you more in the long run. Everyone has been there! lol.

Also higher torque is recommended for a reason. They can handle higher loads more consistently. The thought there is that an "overkill" servo will just last longer because it is under a less % strain over all. Similar to an "overkill" power supply for your pc (if you are into that kind of thing) ;)

Try out your 1257 for a bit. Monitor the temps it makes. If it seems like it is getting waay hot under normal track conditions, you may want to consider something else before it does fail.

Savox servos are also awesome for the money. Dont misunderstand me when I say that all servos will fail eventually. I have seen $50 servos last 3 years and $200 servos last 2 months but sooner or later they all fail. As a shop owner I would say the best servos out right now are the KO propo RSX line but as a racer I have no need for $175 servos.

My pennies
 

I like Hitec for steering because the gears don't wear in the 7955, or break, and the futaba bls451 in throttle because they are super smooth. Any brand can fail that is true. I think you should put those savox in there and run them. The throttle one may be slightly low on torque, but if the brakes work fine then it's fine. A good throttle servo should last a long time, if they don't then something is not right.

you guys are the best...thats why i love this site!

im not really on a budget (unless my wife gets involved) i just don't want to spend unnessisary money if i don't have to, esp if i have 2 perfectly working servos just laying around. i will try them out this weekend and see what happens from there.

thanks for your help