36 lines
1 KiB
C++
36 lines
1 KiB
C++
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#ifndef _PISTONENGINE_HPP
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#define _PISTONENGINE_HPP
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namespace yasim {
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class PistonEngine {
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public:
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// Initializes an engine from known "takeoff" parameters.
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PistonEngine(float power, float spd);
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void setThrottle(float throttle);
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void setMixture(float mixture);
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// Calculates power output and fuel flow, based on a given
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// throttle setting (0-1 corresponding to the fraction of
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// "available" manifold pressure), mixture (fuel flux per rpm,
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// 0-1, where 1 is "max rich", or a little bit more than needed
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// for rated power at sea level)
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void calc(float density, float speed,
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float* powerOut, float* fuelFlowOut);
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private:
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float _P0; // reference power setting
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float _omega0; // " engine speed
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float _rho0; // " manifold air density
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float _f0; // "ideal" fuel flow at P0/omega0
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float _mixCoeff; // fuel flow per omega at full mixture
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// Runtime settables:
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float _throttle;
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float _mixture;
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};
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}; // namespace yasim
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#endif // _PISTONENGINE_HPP
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