RC steering slow or weak? Check the linkage before the servo
If the steering can't keep up with corrections, check the linkage for binding first, then the servo horn, then the servo itself. A drift car needs a servo of 0.06 s/60° or faster.
Why it happens
The servo has to move the wheels against the tyres' grip, and on a drift car it also carries out the gyro's corrections. Binding steering, a flexing horn or a slow servo all feel the same: late, soft steering.
Check in this order
- Free steering. Disconnect the link; the steering should fall side to side under its own weight.
- Steering block bearings. A dry or notchy bearing adds friction to every correction.
- Servo horn. A flexing plastic horn feels exactly like a slow servo. Fit a metal one.
- Servo speed. Drift wants 0.06 s/60° or faster; touring can live with slower.
- Power. Check the ESC's BEC voltage setting suits the servo; a high-voltage servo on a low BEC setting runs slow.
Parts that fix it
- Servos: Servo
- Metal servo horns: Servo Horn
- Steering blocks: Steering block
- Bearings: Bearing
FAQ
What servo speed does an RC drift car need? Around 0.06 s/60° or faster. The gyro can only correct as fast as the servo moves.
Does a metal servo horn make a difference? Yes. A plastic horn flexes under load, which feels like slow, vague steering.
Can the ESC affect servo speed? Yes. The ESC's BEC supplies servo power; if its voltage is set below what the servo is rated for, the servo runs slower.