public SmallFuelTank(AirplaneBase plane)
 {
     air = plane;
     air.AddMass(TANK_MASS);
     air.AddPower(TANK_POWER);
 }
 public MediumEngine(AirplaneBase plane)
 {
     air = plane;
     air.AddMass(MEDIUM_ENGINE_MASS);
 }
 public SmallThruster(AirplaneBase plane)
 {
     air = plane;
     air.AddMass(MASS);
     air.IncreaseInitialVelocity(THRUST);
 }
 public MediumElevators(AirplaneBase plane)
 {
     air = plane;
     air.AddMass(ELEVATOR_MASS);
 }
 public LargeEngine(AirplaneBase plane)
 {
     air = plane;
     air.AddMass(LARGE_ENGINE_MASS);
 }
 public SmallEngine(AirplaneBase plane)
 {
     air = plane;
     air.AddMass(SMALL_ENGINE_MASS);
 }