From 040c508aa87f6f508cc0ac7c6b3bb0912733d4bf Mon Sep 17 00:00:00 2001
From: andy <andy>
Date: Thu, 23 May 2002 19:47:19 +0000
Subject: [PATCH] We don't handle propellers turning backwards.  This got
 clamped implicitly in PropEngine by disallowing negative torques, but that
 was removed at some point.  We really need the explosion protection here at
 the source.

---
 src/FDM/YASim/Propeller.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/FDM/YASim/Propeller.cpp b/src/FDM/YASim/Propeller.cpp
index ee5a9e0ee..59e115b6f 100644
--- a/src/FDM/YASim/Propeller.cpp
+++ b/src/FDM/YASim/Propeller.cpp
@@ -53,6 +53,9 @@ void Propeller::calc(float density, float v, float omega,
     // calculate V (propeller "speed")
     if(v < 0) v = 0;
 
+    // The model doesn't work for propellers turning backwards.
+    if(omega < 0.001) omega = 0.001;
+
     float J = v/omega;
     float lambda = J/_j0;
 
-- 
2.39.5