private Class<? extends SimulationStepper> simulationStepperClass = RK4SimulationStepper.class;
private Class<? extends AerodynamicCalculator> aerodynamicCalculatorClass = BarrowmanCalculator.class;
private Class<? extends MassCalculator> massCalculatorClass = BasicMassCalculator.class;
private Class<? extends SimulationStepper> simulationStepperClass = RK4SimulationStepper.class;
private Class<? extends AerodynamicCalculator> aerodynamicCalculatorClass = BarrowmanCalculator.class;
private Class<? extends MassCalculator> massCalculatorClass = BasicMassCalculator.class;