59 lines
1.2 KiB
C++
59 lines
1.2 KiB
C++
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// vacuum.cxx - a vacuum pump connected to the aircraft engine.
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// Written by David Megginson, started 2002.
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//
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// This file is in the Public Domain and comes with no warranty.
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#include "vacuum.hxx"
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#include <Main/fg_props.hxx>
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VacuumSystem::VacuumSystem ()
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{
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}
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VacuumSystem::~VacuumSystem ()
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{
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}
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void
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VacuumSystem::init ()
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{
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// TODO: allow index of pump and engine
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// to be configured.
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_serviceable_node = fgGetNode("/systems/vacuum[0]/serviceable", true);
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_rpm_node = fgGetNode("/engines/engine[0]/rpm", true);
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_pressure_node = fgGetNode("/environment/pressure-inhg", true);
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_suction_node = fgGetNode("/systems/vacuum[0]/suction-inhg", true);
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}
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void
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VacuumSystem::bind ()
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{
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}
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void
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VacuumSystem::unbind ()
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{
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}
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void
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VacuumSystem::update (double dt)
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{
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// Model taken from steam.cxx
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double suction;
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if (!_serviceable_node->getBoolValue()) {
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suction = 0.0;
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} else {
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double rpm = _rpm_node->getDoubleValue();
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double pressure = _pressure_node->getDoubleValue();
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suction = pressure * rpm / (rpm + 10000.0);
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if (suction > 5.0)
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suction = 5.0;
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}
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_suction_node->setDoubleValue(suction);
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}
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// end of vacuum.cxx
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