Posted: Mar 06, 2011 8:37 am
But only because the blade is turning due to inertia. If there is no net airflow across the blade, where does the energy come from to power the wheels? Remember, the ribbons are hanging down, there is no air movement other than that generated by the spinning of the blades.
Are you saying that if I give a propellor a push with my hands, then that will create airflow relative to the blade which will provide a force to spin the propellor? Where does the energy come from once I stop pushing? Why doesn't it work if I whack the blades of a fan?
Are you saying that if I give a propellor a push with my hands, then that will create airflow relative to the blade which will provide a force to spin the propellor? Where does the energy come from once I stop pushing? Why doesn't it work if I whack the blades of a fan?