Thrust and angled extera thrust

moveY = myTransform.up * Input.GetAxisRaw("UpDown");
moveZ = myTransform.forward * Input.GetAxisRaw("ForwardBack");

m_body.AddForce((moveY + moveZ).normalized * thrustPower * Time.deltaTime, ForceMode.Acceleration);

extraThrust = Vector3.Angle((moveY + moveZ), m_body.velocity.normalized);
thrustPower = oldThrust + extraThrust * 2f;