Torque - Unity 3D

Torsi.cs

using UnityEngine;

public class Torsi : MonoBehaviour {

    public Rigidbody rb;
    public float torque;

	void Start () {
	    rb = GetComponent<Rigidbody>();
	}
	
	void FixedUpdate () {
        float turn = Input.GetAxis("Horizontal");
        rb.AddTorque(transform.up * torque * turn);
	}
}