Unity/airplane/Assets/Scripts/RotateLogic.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class RotateLogic : MonoBehaviour
{
    // Start is called before the first frame update
    public float Speed;
    float MaxSpeed = 3600;
    float ChangeSpeed = -30;
    void Start()
    {
        this.InvokeRepeating("TurnSpeed", 0.1f, 0.1f);
    }

    // Update is called once per frame
    void Update()
    {
        this.transform.Rotate(0, Speed * Time.deltaTime, 0, Space.Self);

    }

    public void Turn(int direction)
    {
        if (direction > 0) ChangeSpeed = System.Math.Abs(ChangeSpeed);
        else ChangeSpeed = -System.Math.Abs(ChangeSpeed);
    }

    void TurnSpeed()
    {
        if (Speed < MaxSpeed && ChangeSpeed > 0) Speed += ChangeSpeed;
        else if (Speed > 0 && ChangeSpeed < 0) Speed += ChangeSpeed;
    }


}