diff --git a/PlaneGcsSdk_Shared/Copters/FakeCopter.cs b/PlaneGcsSdk_Shared/Copters/FakeCopter.cs
index 3c2c84f..917a514 100644
--- a/PlaneGcsSdk_Shared/Copters/FakeCopter.cs
+++ b/PlaneGcsSdk_Shared/Copters/FakeCopter.cs
@@ -32,7 +32,7 @@ namespace Plane.Copters
         /// <summary>
         /// 更新虚拟飞行器状态的时间间隔，单位为毫秒。
         /// </summary>
-        private const int UPDATE_INTERVAL = 50;  //默认100，  150可以跑1000架 100可以跑500架 50可以200-300架
+        private const int UPDATE_INTERVAL = 50;  //默认100， i7电脑 150可以跑1000架 100可以跑500架 50可以200-300架 
 
         /// <summary>
         /// 对飞行器的模拟是否正在运行。
diff --git a/PlaneGcsSdk_Shared/Protocols/MavCommTypes.cs b/PlaneGcsSdk_Shared/Protocols/MavCommTypes.cs
index ea21ca8..63686bf 100644
--- a/PlaneGcsSdk_Shared/Protocols/MavCommTypes.cs
+++ b/PlaneGcsSdk_Shared/Protocols/MavCommTypes.cs
@@ -152,7 +152,7 @@ namespace Plane.Protocols
             public byte lock_status;
             public byte gps_num_sats;
             public Int16 battery_voltage;
-            public Int16 heading;
+            public UInt16 heading;
 
         };