From a26ea45c4344a8baa13867ce2648266ca5ab1cdc Mon Sep 17 00:00:00 2001
From: david <david>
Date: Fri, 28 Jun 2002 18:38:28 +0000
Subject: [PATCH] Update from JSBSim - fix bugs reported by Gonzalo Peralta
 with CHT and oil pressure.

---
 src/FDM/JSBSim/FGPiston.cpp | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/FDM/JSBSim/FGPiston.cpp b/src/FDM/JSBSim/FGPiston.cpp
index 46eaaccf1..9b0e5070c 100644
--- a/src/FDM/JSBSim/FGPiston.cpp
+++ b/src/FDM/JSBSim/FGPiston.cpp
@@ -459,7 +459,7 @@ void FGPiston::doCHT(void)
     
   double HeatCapacityCylinderHead = CpCylinderHead * MassCylinderHead;
     
-  CylinderHeadTemp_degK = dqdt_cylinder_head / HeatCapacityCylinderHead;
+  CylinderHeadTemp_degK += dqdt_cylinder_head / HeatCapacityCylinderHead;
 }
 
 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -507,8 +507,7 @@ void FGPiston::doOilPressure(void)
 {
   double Oil_Press_Relief_Valve = 60; // FIXME: may vary by engine
   double Oil_Press_RPM_Max = 1800;    // FIXME: may vary by engine
-  double Design_Oil_Temp = 85;        // FIXME: may vary by engine
-             // FIXME: WRONG!!! (85 degK???)
+  double Design_Oil_Temp = 358;	      // degK; FIXME: may vary by engine
   double Oil_Viscosity_Index = 0.25;
 
   OilPressure_psi = (Oil_Press_Relief_Valve / Oil_Press_RPM_Max) * RPM;