Moved throttle adj to Instrument manager and made altimeter

Assets/Scripts/RocketPhysics.cs

@@ -2,6 +2,10 @@ using UnityEngine;
 
 public class RocketPhysics : MonoBehaviour
 {
+    [Header("References")]
+    public MainEngine mainEngine;
+
+
     // Start is called once before the first execution of Update after the MonoBehaviour is created
     void Start()
     {