Reply With Quoteso is this going to be on next Wed on Mythbusters big airplane show so you all will finally shut the F up about this????????
Wheel driven? Where did you get that from?
It doesn't track the speed of the wheels...it tracks the speed of the aircraft itself. The speed of the wheels is irrelevant.
If, according to your line of thinking, the plane is not moving than neither is the treadmill. "The treadmill tracks to speed of the plane" means that the plane and the treadmill must not be moving. If one (the plane) is moving, then the treadmill must not be doing anything to negate the forward movement. If the the treadmill is cancelling out any forward movement, then why would the plane be moving at all? What is causing the treadmill to move if the plane is not moving?
Do you mean the treadmill is moving at a speed that the plane "would" be moving if the treadmill was not spinning.
Either way, the plane has left the building.
so is this going to be on next Wed on Mythbusters big airplane show so you all will finally shut the F up about this????????
so is this going to be on next Wed on Mythbusters big airplane show so you all will finally shut the F up about this????????
Yes it is. I checked their website.
Is this a ***boat site????
Lets start this over again!!!
A ***boat is on a Tread Mill, if it has a sail and wing's, Whats the price of Beef in China:idea: :idea: :idea:
Now if the plane's liftoff speed was say...100 knots...and the treadmill was fixed at that speed...the plane will take off...but would have to generate twice the thrust it would have to generate if it were on a non moving runway, and the wheels would be spinning twice as fast.
This is flawed
OK...let's end this once and for all.
The question stated that the treadmill has a speed tracking system on it that tracks the plane's speed, and adjusts its speed to match the plane's speed but in the opposite direction. Basically what this system does is adjusts the treadmill speed so that all forward movement of the plane is cancelled out. No forward movement of the plane = no airflow over the wings = no lift generated = plane will not take off.
Now if the plane's liftoff speed was say...100 knots...and the treadmill was fixed at that speed...the plane will take off...but would have to generate twice the thrust it would have to generate if it were on a non moving runway, and the wheels would be spinning twice as fast.
"Basically what this system does is adjusts the treadmill speed so that all forward movement of the plane is cancelled out"
How did you reach that conclusion? Its just "plane" wrong. The problem says "it adjusts its speed to match the plane's speed but in the opposite direction". Therefore if the plane (fuselage) is not moving, then the treadmill is not moving. If the plane is moving at 10mph then treadmill is moving at 10mph. if the plane slows down, the tread mill slows down. If the plane speeds up the treadmill speeds up.
The only additional drag on the plane is the friction from the wheels. The plane will still have the same aerodynamic drag regardless of the runway motion. If the thrust from the engine is great enough to overcome the additional drag, (I think so) it will take off.
There will be some speed where the aerodynamic drag + the friction of the wheels will = the thrust from the engine. If that speed is great enough, the plane will take off, if not it will continue down the runway. My point is, the plane will be moving forward at some speed, not stationary.
I tried it again today and the plane took off!!! Now I am really confused.
What's that quote?
Better to be silent and thought a fool.......... than speak, and remove all doubt....
OMG...are we really doing this again?!?!?!?!?
Well it all started in the GulfStream thread, then a Google search, the rest is history
And the plane won't fly there is no lift:devil: It aint moving:idea:
A plane is standing on a runway that can move (like a giant conveyor
belt). This conveyor has a control system that tracks the plane's
speed and tunes the speed of the conveyor to be exactly the same (but
in the opposite direction).
Will the plane be able to take off?
Im' amazed at the amount of "information" people add to this basic question. And some of them are pilots!
everything in this question is irrellevant except that the WING gets airflow and creates lift.
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