unity 3d script for a very unrealistic flight model

very naive plane

using UnityEngine;
using System.Collections;

public class VeryNaivePlane : MonoBehaviour {
	public float flightSpeed = 20;
	public float rotationSpeed = 60;

	void Update () {
		transform.position += transform.forward * flightSpeed * Time.deltaTime;
		
		transform.Rotate(Input.GetAxis("Vertical") * rotationSpeed * Time.deltaTime, 
					       Input.GetAxis("Horizontal") * rotationSpeed * Time.deltaTime,
					       -Input.GetAxis("Horizontal") * rotationSpeed * Time.deltaTime);
	}
}