virtual double Calculate(double) {return 0.0;}
void SetName(string name) {Name = name;}
void SetThrusterNumber(int nn) {ThrusterNumber = nn;}
+ virtual void SetRPM(double rpm) {};
virtual double GetPowerRequired(void) {return 0.0;}
virtual void SetdeltaT(double dt) {deltaT = dt;}
double GetThrust(void) {return Thrust;}