Get a rubber band powered airplane. Turn on a treadmill. Wind up the airplane's propeller. Stick the airplane on the treadmill. release the prop. It will fly untill it hits your flatscreen tv.
Get a rubber band powered airplane. Turn on a treadmill. Wind up the airplane's propeller. Stick the airplane on the treadmill. release the prop. It will fly untill it hits your flatscreen tv.
Talk to these people and get them to explain why or why not the plane can take off: http://www.ae.gatech.edu/directory/faculty.htmlOriginally Posted by VooDooXII
Only because the "thrust" exceeds the countering speed of the treadmill.
If the plane increases its thrust...the treadmill will just move faster right?
The wheels may be spinning along at 500 mph, but the plane won't move forward...and it needs forward motion for air to flow over the wings, in turn creating lift so it can take off.
Been done on youtube dozens of times but there is no way for the speed of the plane and the speed of the treadmill to be matched so it's not scientific enough.
doesnt stationary ground move the same speed with respect to an airplanes forward ground speed.
If the jet engine or prop is fired up and propelling the plane forward 10mph and the treadmill is going backwards 10mph then the speed of the wheels is 20mph correct?
Give a little bit more throttle and the plane is going forward 25mph and the treadmill is still matching its speed by going backwards 25mph means the wheels are spinning at 50 mph correct?
Push that throttle some more and get that plane up to 100mph and the treadmill will be going backwards 100mph causing the wheels to be spinning at 200mph correct?
Get the idea here? The plane will always be propelling itself forward right? The treadmill has no effect on the motion of the plane except it will only make the free rolling wheels spin faster..
exactly! and in turn pushes through the air creating more lift as the plane gains speed...
NO.
GOTCHA!
Because, the wheels reduce the friction between the runway and the plane...so if you assume that the wheel bearings are frictionless, it's like the plane has no wheels.
I get it now...wow. I had trouble visualizing it.
now if the airplane was on a long flatbed going that always went faster in reverse with respect to the airplane, not letting the airplane reach its take off AIRSPEED, then no it wouldnt take off. a conveyor belt runway has no affect on the airplanes speed through the air.
I don't believe you...yet. Explain why the plane will indeed take off then I will
GOTCHA!
lol thats messed up.
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Damn you, this isn't my homework! I've got enough of that!I don't believe you...yet. Explain why the plane will indeed take off then I will
For some reason, I went back and edited my post immediately after I submitted it. I guess I felt like I needed to justify my answer. Read my post again.
coulda sworn i just posted that?
exactly, the wheels are just an object that allows the plane to move forward easier...now if the plane had ski's or pontoons, it would still travel forward but the plane would need a little bit more throttle to overcome the resistance. The wheels are free spinning making it completely irrelevant that the "treadmill" is going backwards.
no
hey ls2 kid, i say i get my expired license, go find a big conveyor belt, and me and you go for a ride. it hasn't been all that long since i've flown. we be aight cuz.
in ur PLAIN?
i fly my plain plane on a vertical plane in the plains.
...at night in the rains
plain and simple
I read about one page of this and I can hardly take it. I am not insisting that my logic or my answer is 100% correct, but some of this bs I am reading is absolutely mindless. Make sure your thoughts actually connect before posting.
***Lotus Elise***
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lolol, touche
God I hope you're kidding.............
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no it will not take off. ever. in a plane or in some peoples cases a PLAIN
Can you provide us with any useful knowledge or even a slight debate why it won't besides the completely useless replies you've contributed?
yes i have done that on previous pages, now im just saying no no no, lol
but if u would like for my response, lets get a few things straight, the treadmill is powered on its own, correct?
Billy bad-ass...check out my posts.
That is correct plus it magically detects the speed of the plane so it can operate backwards the exact same speed the plane is traveling forward.
ok, so the plane cannot go faster than the treadmill?
it's ok, some learn from others mistakes while others gotta figure it out on their own...i have no life tonight and probably every night leading up to December 12th, lol. I'll continue to go through it until the entire world understands & believes, it's not like it's a religion...this is based on logic, common sense, and basic physics.
answer my question please.
Correct, the treadmill will always be operating the exact same speed as the plane.
ok so lets say the plane is doing 100 mph, but the tread mill is doing 100 mph the other way and the plane is doing 200 mph all together, right?
The wheels are moving at 200 mph. Read the exchange between speedminded and me.
negative, if the plane is propelling itself forward 100mph and the treadmill is operating against it at 100mph then the wheels and only the wheels will be rotating at 200mph...the plane will still be continuing upon it's normal path forward at 100mph.
The treadmill is 1/2 mile long and powered on its own, rolls backwards at just 2mph, and so the plane must use 95% of its throttle instead of 90%.
Under those circumstances, yes, it will take off since it has to use just a little more power to achieve sufficient air to ground speed to provide the lift necessary for ascent.
I see the argument now focuses solely on whether the plane will move forward. Well of course it will move forward. But if the treadmill spins (lets say) at 150mph which would be the normal takeoff speed on a runway, then the plane would have to go 300mph (150 actual mph, but 300mph faster than the treadmill) before it can take off.
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