diff --git a/DroneSimulator/Drone.cs b/DroneSimulator/Drone.cs
index 5031cd1..9beeb6d 100644
--- a/DroneSimulator/Drone.cs
+++ b/DroneSimulator/Drone.cs
@@ -307,7 +307,7 @@ namespace DroneSimulator
       RealAcc.Update(Acc, (uint)tick);
       RealGyr.Update(Gyr, (uint)tick);
       RealRange.Update(LaserRange, (uint)tick);
-      RealBar.Update(PosXYZ.Z * 11, (uint)tick);
+      RealBar.Update(PosXYZ.Z, (uint)tick);
       RealPos.Update(PosXYZ, (uint)tick);
       RealOF.Update(MoveOF, LaserRange, (uint)tick);
 
diff --git a/DroneSimulator/RealMode.cs b/DroneSimulator/RealMode.cs
index ce26081..df3af2a 100644
--- a/DroneSimulator/RealMode.cs
+++ b/DroneSimulator/RealMode.cs
@@ -225,7 +225,7 @@ namespace DroneSimulator
 
       public void Update(float value, uint time)
       {
-        value = Pressure - value;
+        value = Pressure - value * 12.15f;
 
         if (!Enable)
         {