From df9069a2244cbde73466d7730135df9d57b66e63 Mon Sep 17 00:00:00 2001
From: andy <andy>
Date: Wed, 27 Feb 2002 00:41:57 +0000
Subject: [PATCH] Added a post-solver "initEngines()" call to return the
 engines to a sane initial state.  No more starting up at cruise RPM.

---
 src/FDM/YASim/Airplane.cpp   | 8 ++++++++
 src/FDM/YASim/Airplane.hpp   | 1 +
 src/FDM/YASim/PropEngine.cpp | 7 +++++++
 src/FDM/YASim/PropEngine.hpp | 1 +
 src/FDM/YASim/Thruster.hpp   | 1 +
 src/FDM/YASim/YASim.cxx      | 2 +-
 6 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/src/FDM/YASim/Airplane.cpp b/src/FDM/YASim/Airplane.cpp
index 7515dc639..7132772aa 100644
--- a/src/FDM/YASim/Airplane.cpp
+++ b/src/FDM/YASim/Airplane.cpp
@@ -650,6 +650,14 @@ void Airplane::solveGear()
     }
 }
 
+void Airplane::initEngines()
+{
+    for(int i=0; i<_thrusters.size(); i++) {
+        ThrustRec* tr = (ThrustRec*)_thrusters.get(i);
+	tr->thruster->init();
+    }
+}
+
 void Airplane::stabilizeThrust()
 {
     int i;
diff --git a/src/FDM/YASim/Airplane.hpp b/src/FDM/YASim/Airplane.hpp
index e1901af76..cf088f1b9 100644
--- a/src/FDM/YASim/Airplane.hpp
+++ b/src/FDM/YASim/Airplane.hpp
@@ -59,6 +59,7 @@ public:
     float getFuelDensity(int tank); // kg/m^3
 
     void compile(); // generate point masses & such, then solve
+    void initEngines();
     void stabilizeThrust();
 
     // Solution output values
diff --git a/src/FDM/YASim/PropEngine.cpp b/src/FDM/YASim/PropEngine.cpp
index 0c5c5e34f..32812f5f6 100644
--- a/src/FDM/YASim/PropEngine.cpp
+++ b/src/FDM/YASim/PropEngine.cpp
@@ -123,6 +123,13 @@ void PropEngine::stabilize()
     _eng->setRunning(false);
 }
 
+void PropEngine::init()
+{
+    _omega = 0.01;
+    _eng->setStarter(false);
+    _eng->setMagnetos(0);
+}
+
 void PropEngine::integrate(float dt)
 {
     float speed = -Math::dot3(_wind, _dir);
diff --git a/src/FDM/YASim/PropEngine.hpp b/src/FDM/YASim/PropEngine.hpp
index 11cdb914d..3e4cced64 100644
--- a/src/FDM/YASim/PropEngine.hpp
+++ b/src/FDM/YASim/PropEngine.hpp
@@ -30,6 +30,7 @@ public:
     virtual float getFuelFlow();
 
     // Runtime instructions
+    virtual void init();
     virtual void integrate(float dt);
     virtual void stabilize();
 
diff --git a/src/FDM/YASim/Thruster.hpp b/src/FDM/YASim/Thruster.hpp
index 953c2eb01..b461ad1d5 100644
--- a/src/FDM/YASim/Thruster.hpp
+++ b/src/FDM/YASim/Thruster.hpp
@@ -43,6 +43,7 @@ public:
     // Runtime instructions
     void setWind(float* wind);
     void setAir(float pressure, float temp);
+    virtual void init() {}
     virtual void integrate(float dt)=0;
     virtual void stabilize()=0;
 
diff --git a/src/FDM/YASim/YASim.cxx b/src/FDM/YASim/YASim.cxx
index 9b7fdf16e..e2b6d1e09 100644
--- a/src/FDM/YASim/YASim.cxx
+++ b/src/FDM/YASim/YASim.cxx
@@ -189,7 +189,7 @@ void YASim::init()
     copyToYASim(true);
 
     _fdm->getExternalInput();
-    _fdm->getAirplane()->stabilizeThrust();
+    _fdm->getAirplane()->initEngines();
 
     set_inited(true);
 }
-- 
2.39.5