Recommendet steering servo (specs) for 1:10 buggy

[Collin]

Hi Guys,

basicly I want to find out what are the minimum specs a steering servo would need to propperly work on my 2WD buggys and trucks (Dyna Stom and Blaster for me).

Shure there are no limits using a 45kg servo I think thats way overtuned. What is the range which makes sense for this models regarding speed & power?

In my opinion something around 10kg/cm and 0.1sec/60° at 7.4V would be fairly enought, right?

[sosidge]

10 minutes ago, Collin said:

Hi Guys,

basicly I want to find out what are the minimum specs a steering servo would need to propperly work on my 2WD buggys and trucks (Dyna Stom and Blaster for me).

Shure there are no limits using a 45kg servo I think thats way overtuned. What is the range which makes sense for this models regarding speed & power?

In my opinion something around 10kg/cm and 0.1sec/60° at 7.4V would be fairly enought, right?

Seem like reasonable specs for racing. If you are just bashing, even a Futaba S3003 would do the job in a 2wd buggy, although you might want something with a bit more torque in a 4wd buggy.

The dirt cheap Chinese servos seem to make extravagant torque claims, although they are not necessarily true, and they are not necessarily very fast, although a lot of people seem to like them. I've got one coming in the post for a crawler. I've been very pleased with the Power HD 1812MG in my bashers and crawlers, which is a very reasonably priced servo with proper distribution channels.

I remember when 10kg was considered a very high torque servo!!! Now people seem to expect a minimum of 25kg for everything 

[Jonathon Gillham]

22 minutes ago, Collin said:

Hi Guys,

basicly I want to find out what are the minimum specs a steering servo would need to propperly work on my 2WD buggys and trucks (Dyna Stom and Blaster for me).

Shure there are no limits using a 45kg servo I think thats way overtuned. What is the range which makes sense for this models regarding speed & power?

In my opinion something around 10kg/cm and 0.1sec/60° at 7.4V would be fairly enought, right?

Thats pretty much what I aim for, 10kg and 0.1sec.  My race buggies have the Savox 1258TG in them which are stronger and faster. I use low profile in my bashers and onroad cars. My race cars have the Trackstar 99X which work well and have lasted years now. I also have quite a few SPT 4412LV and JX 4009MG in my other cars and they all work well. I'm not sure if they are as good as they claim but they are good enough.

I used to use the Savox 1251MG in my Ae B6 but found it too slow so swapped to the 1258TG. That also helped with a but more weight up front.

My theory is that while I trust Savox claims, even if the others are out by 10 - 20% they are still more than enough. I think speed is more important than torque as the 3kg of the S3003 turns the wheels fine. I don't understand why people have such torquey servos (in saying that the Futaba S9373 in my 8th buggy are amazing, but its the speed more than the torque)

I find the old S3003 spec to be too slow, they take an age to turn the wheels in a buggy. They also cost about the same as the SPT and JX which are metal geared and much better spec. 

Oh one thing, all the servos above are only rated to 6V, so would be faster and stronger at 7.4V but probably wouldn't last long. I think you'll be paying more for HV servos. I have actually been looking at what would work for the next lot of race cars and they are expensive. HV servos with specs similar to the 1258TG cost at least 50% more. I think that since I race stock classes the .1sec is fine, maybe need faster for mod, I don't know. I see a lot of fast guys at the club run expensive servos but then a lot use the 1251MG so I suspect we are at peak servo now.

[hIghQ]

I agree. 10kg / 0.1s sounds reasonable. A little faster and/or stronger (i.e. 12-15kg) would not hurt, depending on how you use the car, but it's certainly not required.

[Collin]

Thank you all. Seems like I had the right feeling for the needed specs.

Now its just a pitty that I would need 3 or 4 nice steeing servos, the one I had choosen (low profile, SRT or HD brand) cost around 50-60€ which is quiet a lot for me to buy them at once.

Now I am not shure about the budget ones, I think I just dont want them. Its like a nice new car with chrap tires on it.

[hIghQ]

I perfectly understand everyone has a budget. I also understand that people do not even want to spend as much as they could. But a word of advice: there are certain things I would not recommend to ever skimp on. First one is the radio. It's after all what controls your precious RC - the only thing connecting it to you. Second thing is the servo. When you go down the long straight on a racetrack really, really fast, it's what makes the car drive through the turn at the end, instead of hammering a hole through the barriers (imagine your own situations for bashing here). I want something good and reliable for that.

That being said, of course one doesn't need the very best and most expensive on the market. But get something well known with a good reputation. Also your (good) radio (and servos) will likely accompany you for years, and probably more than one car, and as I said earlier, they are among the most important parts of your RC gear. Another important thing (at least for racing or track-use) are tires. After all it's what connects your car to the ground. I'd say all of that is probably more important than for example the motor - although maybe not as sexy or exciting as pure speed is at first glance.

Anyone into building their own PCs? It's like spending 1500 € (or $ or £) on the graphics card alone and then choosing a 30€ no-name power-supply to run the whole thing (and then wondering why it keeps crashing or burst into flames and burn your apartment down - and yes, that can actually really happen).

So, to cut a long story short: while 50-60€ per servo can add up quickly if you have several cars, it's about what I'd expect for a good quality servo.

[Collin]

I totally agree and this is the reason I dont go and buy 15€ servos in a bulk from a unknown brand.

[Willy iine]

I'll post back after I try my new $23 Amazon servo.. 0.09 sec/20kg at 6v..  based on their high torque version, I am assuming it is going to be pretty good.  

[Collin]

which brand are they?

 

[mike in pa]

I've been using Futaba 3004 in all my buggys and they work fine.

[Willy iine]

On 10/23/2021 at 4:36 AM, Collin said:

which brand are they?

 

Amazon calls them ANNIMOS.   I have a bunch of their 20kg high torque servos I use almost exclusively on my M38's and other trucks.  They are digital and centering is very accurate.  I've not had one go bad yet, unlike more expensive brand ones.. 

[Mad Zero]

Worth noting that with HV servos the big number on the side is the torque at max voltage so will be considerably less with a 4.8v BEC, as will the speed.