Slow rigidbody movement in all directions but forward.

Hi, I have a short script that controls a spacecraft. I have two issues with it. Firstly the rotation doesn't change speed if I increase or decrease the MaxRotSpeed variable even though it is being calculated with it. Secondly I have no idea how I am going to slowly cease all movement in every direction other than the one I want to go in. At the moment if I turn while flying the velocity doesn't decrease as I move in a new direction except if move in the actively oppose it by flying in the exact opposite direction. At the moment all I am doing is adding speed in my new direction and keeping the speed in my old direction. Here is my full script: public class PlayerControlScript : MonoBehaviour {

     public float maxMovSpeed = 5.0f; // Maximum speed set by the engine component
     public float curMovSpeed = 0.0f; // Current speed set by the player increasing of decreasing the throttle
     public float accSpeed = 0.1f; // Speed at which the movSpeed can increase or decrease
     public float maxRotSpeed = 5.0f; // Maximum speed at which the craft can rotate
     public float brakePower = 0.97f;  // How quickly the brake affects the craft
 
     void FixedUpdate() {
         // Yaw, Pitch and roll
         float h = Input.GetAxis("Mouse X"); // Yaw
         float v = Input.GetAxis("Mouse Y"); // Pitch
         float roll = Input.GetAxis("Roll"); // Roll
 
         rigidbody.AddRelativeTorque(-v * maxRotSpeed, h * maxRotSpeed, roll * maxRotSpeed); // Use the 3 rotations in a vector that is multiplied by the max roll speed and added relatively to the rigidbody as torque
 
         // Accellerate
         // If the forward button is pressed add speed to move speed var
         if (Input.GetAxis("Forward") > 0.0f && curMovSpeed < maxMovSpeed) {
             curMovSpeed += accSpeed;
         }
         // Deccellerate
         // If the backward button is pressed remove speed from move speed var
         if (Input.GetAxis("Forward") < 0.0f && curMovSpeed > -maxMovSpeed){
             curMovSpeed -= accSpeed;
         }
 
         rigidbody.AddForce(transform.forward * curMovSpeed); // Add move speed var to rigidbody as force in forward direction
 
         // If the left or right buttons are pressed add lateral force accordingly
         if (Input.GetAxis ("Right") > 0.0f || Input.GetAxis ("Right") < 0.0f) {
             rigidbody.AddForce(transform.right * (curMovSpeed / 2) * Input.GetAxis ("Right"));
         }
 
         // If the brake button is pressed slow to a stop in all directions
         if (Input.GetAxis ("Brake") > 0.0f)
         {
             rigidbody.velocity = rigidbody.velocity * brakePower; 
         }
     }
 }