diff --git a/protos/action/action.proto b/protos/action/action.proto
index 3ac5b9ab..142da006 100644
--- a/protos/action/action.proto
+++ b/protos/action/action.proto
@@ -137,14 +137,6 @@ service ActionService {
      * Set takeoff altitude (in meters above ground).
      */
     rpc SetTakeoffAltitude(SetTakeoffAltitudeRequest) returns(SetTakeoffAltitudeResponse) {}
-    /*
-     * Get the vehicle maximum speed (in metres/second).
-     */
-    rpc GetMaximumSpeed(GetMaximumSpeedRequest) returns(GetMaximumSpeedResponse) {}
-    /*
-     * Set vehicle maximum speed (in metres/second).
-     */
-    rpc SetMaximumSpeed(SetMaximumSpeedRequest) returns(SetMaximumSpeedResponse) {}
     /*
      * Get the return to launch minimum return altitude (in meters).
      */
@@ -279,19 +271,6 @@ message SetTakeoffAltitudeResponse {
     ActionResult action_result = 1;
 }
 
-message GetMaximumSpeedRequest {}
-message GetMaximumSpeedResponse {
-    ActionResult action_result = 1;
-    float speed = 2; // Maximum speed (in metres/second)
-}
-
-message SetMaximumSpeedRequest {
-    float speed = 1; // Maximum speed (in metres/second)
-}
-message SetMaximumSpeedResponse {
-    ActionResult action_result = 1;
-}
-
 message GetReturnToLaunchAltitudeRequest {}
 message GetReturnToLaunchAltitudeResponse {
     ActionResult action_result = 1;