From a4af83d4545f71771d14d312841e5cd053fad3ee Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <tridge@samba.org>
Date: Fri, 20 Dec 2013 09:42:49 +1100
Subject: [PATCH] Plane: only allow right rudder for arming

copter users may try to use left rudder to ensure aircraft is
disarmed. Making left rudder arm could be dangerous
---
 ArduPlane/radio.pde | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/ArduPlane/radio.pde b/ArduPlane/radio.pde
index e052d607fb..c2320c5ac1 100644
--- a/ArduPlane/radio.pde
+++ b/ArduPlane/radio.pde
@@ -94,10 +94,8 @@ static void rudder_arm_check()
         return;      
     }
 
-    // full left or right rudder starts arming counter
-    if (g.rc_4.control_in > 4000 
-        || g.rc_4.control_in < -4000) {
-        
+    // full right rudder starts arming counter
+    if (g.rc_4.control_in > 4000) {
         uint32_t now = millis();
 
         if (rudder_arm_timer == 0 ||