From 80e300c65afa027e511e143dab32315a13c08ca1 Mon Sep 17 00:00:00 2001
From: curt <curt>
Date: Wed, 28 May 2003 18:47:42 +0000
Subject: [PATCH] At low rpms when the alternator isn't able to generate enough
 current to charge the battery, don't show positive amps.

---
 src/Systems/electrical.cxx | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Systems/electrical.cxx b/src/Systems/electrical.cxx
index 6e781f050..4905dbeb4 100644
--- a/src/Systems/electrical.cxx
+++ b/src/Systems/electrical.cxx
@@ -335,7 +335,9 @@ void FGElectricalSystem::update (double dt) {
     // make this more generic
     double amps = 0.0;
     if ( fgGetBool("/controls/switches/master-bat") ) {
-        if ( fgGetBool("/controls/switches/master-alt") ) {
+        if ( fgGetBool("/controls/switches/master-alt") &&
+             fgGetDouble("/engines/engine[0]/rpm") > 800 )
+        {
             amps += 40.0 * alt_norm;
         }
         amps -= 15.0;            // normal load
-- 
2.39.5