diff --git a/Python/src/xplaneConnect.py b/Python/src/xplaneConnect.py
index 9a38c82..5138d55 100644
--- a/Python/src/xplaneConnect.py
+++ b/Python/src/xplaneConnect.py
@@ -174,10 +174,11 @@ class XPlaneConnect(object):
                   * Throttle [-1, 1]
                   * Gear (0=up, 1=down)
                   * Flaps [0, 1]
+                  * Speedbrakes [-0.5, 1.5]
               ac: The aircraft to set the control surfaces of. 0 is the main/player aircraft.
         '''
         # Preconditions
-        if len(values) < 1 or len(values) > 6:
+        if len(values) < 1 or len(values) > 7:
             raise ValueError("Must have between 0 and 6 items in values.")
         if ac < 0 or ac > 20:
             raise ValueError("Aircraft number must be between 0 and 20.")
@@ -189,11 +190,13 @@ class XPlaneConnect(object):
             if i < len(values):
                 val = values[i]
             if i == 4:
-                val = -1 if val == -998 else val
-                buffer += struct.pack("B", val)
+                val = -1 if (abs(val + 998) < 1e-4) else val
+                buffer += struct.pack("b", val)
             else:
                 buffer += struct.pack("<f", val)
         buffer += struct.pack("B", ac)
+        if len(values) == 7:
+            buffer += struct.pack("<f", values[6])
 
         # Send
         self.sendUDP(buffer)
diff --git a/TestScripts/Python Tests/Tests.py b/TestScripts/Python Tests/Tests.py
index 78c6e32..fc98c26 100644
--- a/TestScripts/Python Tests/Tests.py	
+++ b/TestScripts/Python Tests/Tests.py	
@@ -171,7 +171,7 @@ class XPCTests(unittest.TestCase):
         expected = 0.0
         do_test()
 
-
+        
     def test_sendCTRL(self):
         # Setup
         drefs = ["sim/cockpit2/controls/yoke_pitch_ratio",\
@@ -209,6 +209,36 @@ class XPCTests(unittest.TestCase):
         ctrl = [ 0.0, 0.0, 0.0, 0.8, 1.0, 0.0 ]
         do_test()
 
+    def test_sendCTRL_speedbrake(self):
+        # Setup
+        dref = "sim/flightmodel/controls/sbrkrqst"
+        ctrl = []
+
+        def do_test():            
+            client = xpc.XPlaneConnect()
+
+            # Execute
+            client.sendCTRL(ctrl)
+            result = client.getDREF(dref)
+
+            # Cleanup
+            client.close()
+
+            # Tests
+            self.assertAlmostEqual(result[0], ctrl[6])
+
+        # Test 1
+        ctrl = [-998, -998, -998, -998, -998, -998, -0.5]
+        do_test()
+
+        # Test 2
+        ctrl[6] = 1.0
+        do_test()
+
+        # Test 2
+        ctrl[6] = 0.0
+        do_test()
+
     def test_sendPOSI(self):
         # Setup
         drefs = ["sim/flightmodel/position/latitude",\