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"jesse" wrote:
when you walk on a treadmill, do you have any significant airspeed(minus wind and fans)? you are moving forward relative to the treadmill belt only, your airspeed is zero, sure your legs are moving at say three miles per hour, and the treadmill belt is moving three miles per hour the opposite way, but without airspeed you have no lift(assuming your arms were airfoils). its not that complicated people. the thrust of the airplane is only used in most cases, to provide a movement of air over the wings to cause lift. if the supposed airplane is stationary to the air, regardless how much thrust is being used to "keep up" with the treadmill, no lift will be created, try it with an rc plane on a real treadmill if you dont believe me. Im not calling anyone stupid, but didnt everybody learn in PP ground school that ground speed has nothing to do with airspeed and the associated lift? thats one of the first things, the most basic of things that i was taught. im done with this topic. enjoy, let the roasting begin! Jester PP-ASEL A&P some people apparently have a hard time reading. "a conveyer belt that moves in the opposite direction at exactly the speed that the airplane is moving forward." When the conveyor belt is moving backwards at 80mph, how fast is the plane moving? Hint: there is no mention of how fast the plane is moving relative to the conveyor belt. If the plane is moving forward at 80mph, is it likely to have enough airspeed to fly? If you are still confused, when the plane is moving forward at 80mph, the conveyor will be moving backwards at 80mph, and a speedometer that measures off of tire rotation would indicate the plane's speed (before getting airborne) as 160mph, the speed relative to the conveyor. -- Alex -- Replace "nospam" with "mail" to reply by email. Checked infrequently. |
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