Aircraft controller script

Hi,

I have the following script to control my airplane in air. I 'stole' some values from the wikipedia page of the F-16 aircraft and I applied those to the model in game.

 void FixedUpdate()
 {
     float L = 0.5f * Globals.AirDensity(transform.position.y, AltUnit.Meters) * rigidbody.velocity.magnitude * m_Planform * 2.0f * Mathf.PI * Vector3.Angle(transform.forward, Vector3.up);
     float pitch = Input.GetAxis("pitch");
     float roll = Input.GetAxis("roll");
     float yaw = Input.GetAxis("yaw");
     float finalRotFactor = m_RotSpeed * (Thrust / MaxThrust);
     

     rigidbody.AddRelativeTorque(Vector3.right * pitch * finalRotFactor, ForceMode.Impulse);
     rigidbody.AddRelativeTorque(Vector3.up * yaw * finalRotFactor, ForceMode.Impulse);
     rigidbody.AddRelativeTorque(Vector3.forward * roll * finalRotFactor * 4, ForceMode.Impulse);
     
     rigidbody.AddForce(transform.forward * Thrust * 2, ForceMode.Impulse);
     rigidbody.AddForce(Vector3.up * L, ForceMode.Force);
     
     m_Lift = L;
     m_Velocity = rigidbody.velocity.magnitude;
 }

Now it kinda works. I can fly around and all that, but the moment I turn or bank, it feels like I'm drifting through the air. It's like it still applies the force towards the old angle that the aircraft was in.

How do I stablize it to go forward and not slip 'n' slide all over the place? And... is this script correct? Am I doing something wrong? Thanks!