Aircraft Landing

Hi there.

I have a flight game going and I have the flying part done I just want to land the aircraft. Thing is I have no idea how to do this.

If anyone could give me some sort of idea on how I could that.

Thanks in advance.

Here is the aircraft code, it contains no physics:

public class FlightControls : MonoBehaviour {
    public float speed;
    private float GUIspeed;
    public Text speedCounter;

    [Range(0, 50)]public float camForward;
    [Range(0, 50)]public float camUp;
   
    // Update is called once per frame
    void Update () {

        //Camera follow code
        Vector3 moveCamTo = transform.position - transform.forward * camForward + Vector3.up * camUp;
        float bias = 0.96f;
        Camera.main.transform.position = Camera.main.transform.position * bias + moveCamTo * (1.0f-bias);
        Camera.main.transform.LookAt(transform.position + transform.forward * 30.0f);

        // Makes plane go forward
        transform.position += transform.forward * Time.deltaTime * speed;

        // Decrease speed when pitched upwards
        speed -= transform.forward.y * Time.deltaTime * 2f;

        // Sets the speed for the GUI
        GUIspeed = speed * 8;
        speedCounter.text = "Speed: " + GUIspeed.ToString();

        if(Input.GetKey(KeyCode.KeypadPlus)){
            speed += 1;
        }else if(Input.GetKey(KeyCode.KeypadMinus)){
            speed -= 1;
        }

        if(speed > 173.72f){
            speed = 173.72f;
        }

        // Stalling code will go here
        if(speed < 0f){
            speed = 0f;
        }
        // Pitch and Roll control
        transform.Rotate(Input.GetAxis("Vertical") * 1.5f, 0.0f, -Input.GetAxis("Horizontal") * 2f);

        // Terrain collision detection
        float terrainHeightWhereWeAre = Terrain.activeTerrain.SampleHeight(transform.position);

        if(terrainHeightWhereWeAre > transform.position.y){
            transform.position = new Vector3(transform.position.x,
                                             terrainHeightWhereWeAre,
                                             transform.position.z);

            //Can put crash code here
            Debug.Log("Crashed");
        }
    }
}

I suppose it would be like collision, but your plane would need to be nearly level and at the right speed.