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Wire up a "gear-ratio" attribute for geared propeller aircraft

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andy 2004-01-24 23:09:41 +00:00
parent f845aa9b2a
commit 5af1e589de
3 changed files with 6 additions and 1 deletions
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2
src/FDM/YASim/FGFDM.cpp
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@ -623,6 +623,8 @@ void FGFDM::parsePropeller(XMLAttributes* a)
prop->setManualPitch();
}
thruster->setGearRatio(attrf(a, "gear-ratio", 1));
char buf[64];
sprintf(buf, "/engines/engine[%d]", _nextEngine++);
EngRec* er = new EngRec();

3
src/FDM/YASim/PropEngine.cpp
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@ -11,6 +11,7 @@ PropEngine::PropEngine(Propeller* prop, PistonEngine* eng, float moment)
_dir[0] = 1; _dir[1] = 0; _dir[2] = 0;
_variable = false;
_gearRatio = 1;
_prop = prop;
_eng = eng;
@ -154,7 +155,7 @@ void PropEngine::integrate(float dt)
_eng->setMixture(_mixture);
_eng->setFuelState(_fuel);
_prop->calc(_rho, speed, _omega, &thrust, &propTorque);
_prop->calc(_rho, speed, _omega * _gearRatio, &thrust, &propTorque);
_eng->calc(_pressure, _temp, _omega);
engTorque = _eng->getTorque();
_fuelFlow = _eng->getFuelFlow();

2
src/FDM/YASim/PropEngine.hpp
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@ -17,6 +17,7 @@ public:
void setAdvance(float advance);
void setPropPitch(float proppitch);
void setVariableProp(float min, float max);
void setGearRatio(float ratio) { _gearRatio = ratio; }
virtual PropEngine* getPropEngine() { return this; }
virtual PistonEngine* getPistonEngine() { return _eng; }
@ -45,6 +46,7 @@ private:
bool _variable;
int _magnetos; // 0=off, 1=right, 2=left, 3=both
float _gearRatio;
float _advance; // control input, 0-1
float _maxOmega;
float _minOmega;