That's why you make a scale model. say 5 inches high. The Intergalactic VEEG-powered full sized model costs Millions of dollars, to be sure. But the scale model is small, and costs a small amount of money. I bet you could make a small working model for $20-$30. You could use the motors in things like electric tooth brushes. Every engineer uses scale models, because there is never enough money to try out a new idea full scale. Sometimes an engineer will run a scale model in water, or even denser fluid. That way, he can run the experiment at reduced speed, and still get valid results.