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Tune up the starter torque to match the recent changes to engine

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friction.  We should get these better calibrated at some point...
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andy 2004-03-26 22:53:41 +00:00
parent 0c01cebfc3
commit 17b6142a76
1 changed files with 5 additions and 3 deletions
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8
src/FDM/YASim/PistonEngine.cpp
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@ -191,10 +191,12 @@ void PistonEngine::calc(float pressure, float temp, float speed)
float power = _power0 * burned/_f0;
_torque = power/speed;
// Figure that the starter motor produces 20% of the engine's
// cruise torque.
// Figure that the starter motor produces 60% of the engine's
// cruise torque. That sounds like a lot to me, but it's
// necessary to produce the right acceleration. Someone should
// find a good reference for this...
if(_cranking && !_running)
_torque += 0.20f * _power0/_omega0;
_torque += 0.60f * _power0/_omega0;
// Also, add a negative torque of 10% of cruise, to represent
// internal friction. Propeller aerodynamic friction is too low