From c89e5203a55c7ce4adc73c0fe16ca7d8ffc5afc6 Mon Sep 17 00:00:00 2001
From: andy <andy>
Date: Wed, 23 Mar 2005 18:54:58 +0000
Subject: [PATCH] Insert a sanity hack from Melchior that apparently prevents a
 NaN from popping up and crashing when the B-29 model is in use.  This isn't
 the right solution; we should fine the NaN condition.  But it's harmless and
 allows development with the B-29 to continue.

---
 src/FDM/YASim/PropEngine.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/FDM/YASim/PropEngine.cpp b/src/FDM/YASim/PropEngine.cpp
index 866ef8165..ca5e51bf7 100644
--- a/src/FDM/YASim/PropEngine.cpp
+++ b/src/FDM/YASim/PropEngine.cpp
@@ -176,6 +176,8 @@ void PropEngine::integrate(float dt)
     _eng->setFuelState(_fuel);
     
     _prop->calc(_rho, speed, _omega * _gearRatio, &thrust, &propTorque);
+    if(_omega == 0.0)
+        _omega = 0.001; // hack to get around reports of NaNs somewhere...
     propTorque *= _gearRatio;
     _eng->calc(_pressure, _temp, _omega);
     _eng->integrate(dt);