Steering Servo

[Big Be]

Hello.

I have a TT02 Chassis,1/10 scale  with a Torque Tuned Motor and a 4200 S2 Lipo battery also a HobbyWing Quicrun 1060 ESC.

I am after a Steering Servo that would suit as i do some club racing on an indoor circuit. I can only do so much in performance. There is a lot to choose from as in

kg ratings . I had a 18Kg in it before, was that enough or too much ??. Any answers would be helpful.

Regards

Big Be

[alvinlwh]

Nothing wrong with a 18kg servo but it is probably not needed to be that high for a TT. I will trade speed for power. A faster servo at 9 - 12kg will be ideal IMHO. 

[sosidge]

Torque isn't really relevant in a 1/10th touring car, the servos that get sold based on torque ratings tend to be cheapies aimed at big wheeled bashers and crawlers.

Speed is more important. Less than 0.1s for 60 degrees. Around 10kg torque will be plenty. 

If you want a cheap servo I would recommend a Futaba U300. Not especially fast or torquey but very reliable. A TT-02 with a torque tuned is a slow car so the servo suits it. There are plenty of off-brand servos at similar prices but they can be a bit of a risk.

Higher up the price range you'll find lots or servos that are aimed at racing. I have a high end Futaba and SRT servos in my race cars and would recommend both brands. But I wonder whether they are overkill in a TT-02.

 

 

[skom25]

In the past I had servos with speed around 0,15s. Then I tried 0,07s and difference is huge.

It is not about speed from lock to lock. It is about responsivity and "natural" feel of steering. You can feel that car reacts for your inputs immediately. It was one of the best upgrades for me.

Torque Tuned is not very powerful, so not too much speed at the end. Even 8kg will be absolutely enough.

[Big Jon]

How about a Savox 1251 low profile? It’s probably a bit overkill for your application, but it works well in a variety of chassis, has excellent performance at a semi-reasonable price, and is dead reliable. It’s not a “throwaway” servo, and you could use it later in a more advanced touring car or buggy.

[WhteRbt]

Cheap, fast, reliable (so far): https://a.aliexpress.com/_Ev3dFcu

And the cable is so long, you could use it as a dog leash. Prepare to shorten it to the desired length.

[Wooders28]

8 hours ago, Big Be said:

I had a 18Kg in it before, was that enough or too much ??. Any answers would be helpful

I wouldn't over worry about kg ratings, as you can run into esc trouble if you go too much (the esc BEC rating will decide how powerful a servo you can have, same as the esc amp rating for the motor turn, its called 'brown out' and cuts esc out for a second, you can get 'Glitch Busters' that help stop it though ), so probably concentrate on reliability, as there's nothing worse than an evenings racing ruined, as you bought a cheap servo to save a few quid, so this rules out Amazon or eBay etc deals imo.

I quite like the Corerc 9016MG as a budget servo, or a savox 1257tg for full race (although Savox have a reputation for being power hungry, and Brown out), had no issues with either, it's a bit of a mine field though, but if you stick to a recognised modelshop outlet, it narrows it down a bit.

[skom25]

1 hour ago, Big Jon said:

How about a Savox 1251 low profile? It’s probably a bit overkill for your application, but it works well in a variety of chassis, has excellent performance at a semi-reasonable price, and is dead reliable. It’s not a “throwaway” servo, and you could use it later in a more advanced touring car or buggy.

I do not think it is overkill. I will buy it for my TT-02.

I have SRT CH6012 which has similar specs to mentioned Savox in XV-01 and DT-02 and it is excellent.

[chris.alex]

These days, almost all servos for 1/10 scale cars have metal gears and much more torque than they did 15 years ago. Except for my crawlers, I don't need more than 10kg/6V in any car.

I agree that in other cars, servo speed is much more important than torque. The faster you go, the faster your servo should be. 🙂

I've had good experiences with servos from Blue Bird and Savöx. Amewi's are affordable yet reliable. 

[alvinlwh]

4 hours ago, WhteRbt said:

Cheap, fast, reliable (so far): https://a.aliexpress.com/_Ev3dFcu

+1 for these Injora (and also SPT) servos. Pretty good for a budget servo, and cheap enough to bin and get a new one if they go wrong. 

[Big Be]

Thank you all for the recomendations it has given me something to think about.

Regards

Big Be