https://www.tigerdroppings.com/rant/o-t-lounge/can-this-747-take-off/112973229/
I read all 22 pages of this, get on my level.
/h/random
LiterallyShaking
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TER, drop the F
27d ago
(tigerdroppings.com)
Edited 27d ago
157 thread views
#260556
Can this 747 take off?
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Huh
I'ma need a bigger bag for the cohort
Tryna make a millionaire out of slum dogs
Bet that, head crack, blunt force
Cozy with the east Africans up north
Where seven make a three, turn a ten by law
Crescent moon wink, when I blinked it was gone
Left the crib, smacked, no sheath on the sword
Made it by the skin of my teeth, thank God
'03, momma rockin' Liz Claiborne
Had her stressin' up the wall playin' Mary J. songs
Rainy day came, couldn't rinse the stains off
Long way to go, we already came far
Story stayed the same, it was never madе up
Threw me loose changе, look at what I made of it
When the mood change, I'ma poker-face 'em
It's a new day, who got all the aces?
Who be foldin' late? Who know when to play dead?
Who sit up straight when the roof caved in?
Had a full plate, you ain't wanna split it
Tell it to you straight, you ain't wanna listen
Cup runneth over the brim
Bust open, there's no closin' the lid
Drumroll, here go my lil' entrance
Gung ho, I'm the one that go get it
Five O's on me like the Olympics
Pure gold, somethin' told me, "Don't mix it"
Caught a feelin', momma had me out Temple
Not religious, we was really out Philly
Livin' on the fly tryna wing it
We got us a fire to rekindle
Redirect the fight where it's meant for
Triumph over plight and immense loss
Ride alone at night, I get clear thoughts
Caught a couple slights and I veered off
Saw another height, had my ears poppin'
Walked outside, it was still gorgeous
Sharp incisors reveal slowly
In the dark inside, we was real hungry
On a seven of the five, we was real hungry
Uh, niggas still drummin'
Foot shook ground when I stepped on it
Didn't look back when I broke soil
'Cause every time I did it would hurt more
In the dark inside, we was real hungry
On a seven of the five, we was real hungry
And I didn't look back when I broke soil
'Cause every time I did it would hurt more
Alright
Yessir, this nigga spittin'
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Of course not. Lift depends on the wings and other lifting surfaces moving relative to the air, it doesn't matter how fast the engines are spinning or whatever if the wings and other lifting surfaces aren't moving relative to the air.
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Yeah but you wings can go flap to create lift like birds do
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Well yeah, if the wings are flapping because they are a bird's wings or because they are attached to a Boeing fuselage by a couple of half-tightened lug nuts, then they are moving relative to the air and thus can potentiality create lift.
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But if the conveyer belt is moving hundreds of miles an hour won't it create wind shit or something idk 😐
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It would create wind due to skin drag, but it would be very turbulent and I doubt it would reach high enough to pass over the wings.
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No.
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No because it is manufactured by Boeing which has had tons of manufacturing and maintenance problems.
Also I'm r-slurred and I guessed on the poll lmao.
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Yes.
You are all idiots. The engines expel air out the back, which pushes the plane forwards. End of story. The speed of the wheels doesn't matter.
Thought Experiment.
a) Suppose we replace the runway with frictionless ice and the airplane with a hockey puck with a propeller on the top (The hockey puck obviously moves forwards).
b) Start moving the ice around. Obviously, it has no influence on the puck because it is frictionless.
In the Thought Experiment, I assumed a frictionless runway. In reality, there is friction, but the coefficient of friction here is going to be very low (because it's on wheels), enough for the airplane's engines to overcome. A good exercise would be to find the threshold coefficient of friction of where $V_1$ (minimum takeoff velocity) cannot be achieved.
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I think I get it now. I think people get stuck on the treadmill matching the speed of the wheels. But since it is moved forward via the engines expelling air the wheels and treadmill don't actually matter. For them to matter the treadmill + wheels would have to be exerting enough force against the plane to counteract the engines, but what would most likely happen is the wheels would just spin faster as the treadmill moves faster. However if enough negative force could be generated by the treadmill and wheels then the plane would stay still relative to the air and be unable to take off.
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No.
The engines are there to push the plane forward relative to the more or less stationary air. It is the air flowing around the wing that due to Bernoulli forces generates lift. Since in this case the plane doesn't move forward relative to the air, it will not be able to take off.
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Why not?
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yes
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Yes Nerds please explain thank you? I want insight into fascinating brains
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https://rdrama.net/h/random/post/260556/can-this-747-take-off/6247985#context
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As the plane is pulled forward by the engines, "exactly matching" the speed of the wheels requires a faster and faster treadmill, since increasing the treadmill speed increases the wheel speed
The feedback loop would theoretically cause the speed of the treadmill to increase indefinitely
In practice your wheels and treadmill will just catch fire and disintegrate or whatever: you're not going to get anything near the friction needed to stop the engines from pulling the plane forward anyway
But in theory if you could produce a treadmill and set of wheels that could handle unlimited speed, then you'd have unlimited friction, and the plane really wouldn't be able to move
As it stands we don't even have a universe that could handle that
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Frick no, where does the lift come from?
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From the plane moving forwards.
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I mean if it's true that the conveyor belt always matches the speed of the wheels in the opposite direction, that means the plane would always remain stationary relative to the ground. The conveyor belt would have to go REALLY REALLY fast though.
Like if the "wheels would spin twice as fast" then the conveyor belt would have to go twice as fast as well.
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Not true. Can you elaborate on how you reached this conclusion?
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Obvious yes planes don't have motors for their wheels
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