For all of You visual learner's

[packerfan 10+ year member]

seriously people he is right. The wheels have nothing to do with the plane.
The engines on a plane push the air behind it, not the ground. Ground speed dosent matter.

In a perfect world, imagine that the wheels dont have any friction. In that case, the fact that the ground was moving would have 0 effect on the plane. Add in friction from the wheels, you get drag, but because the engines on a plane are so powerfull it wont make any difference.

i dont see any other way of explaining this. The wheels dont matter. The plane flys by pushing the AIR behind it. Whats its wheels are doing dont matter. Its not like a car that needs to push off of thr ground to maintain velocity. The plane pushes off of the air around it to keep up to speed, whether on the ground or in the air.

STOP ALL THIS MADNESS

i brought this up in physics today and 2 professors agreed with what i have said.

If the plane was stationary it wouldnt fly, but the fact is, it wouldnt remain stationary. I think thats whats confising people. NO one claimed that the plain would like levitate off of the runway anf fly off. Its the fact that once the plane turns up its engines, it will over come the drag caused by the friction of the wheels and take off.

ROOFLES

 

[gHOstFaCe 10+ year member]

Basically if the plane has no forward thrust, it would remain stationary. This is because the wheels do spin freely, absorbing the velocity of the conveyor belt. So when you calculate the forward velocity of the plane at 2, it is higher then the air velocity, therefor allowing the plane to lift off and fly at a forward velocity of 2.

 

[jgarcia9102 10+ year member]

The ground is always moving......remember, we live on earth. Big rock, 3rd from the sun.
It's constantly rotating.

But remember squeak, The earth moves along with its atmosphere, so its really not moving at all to us.

Thats relative velocity. like the fly in a jar. slowly move the jar back and forth, the fly dosent have to move with it to keep itself from hitting the side.

i think we both agreed that the plane would fly, but i wouldnt compare it to the earth moving.....

and im done with this thread. i cant think anymore. i need a vacation....

 

[pwnt by pat 10+ year member]

The plane flys by pushing the AIR behind it.

hahaha... way to be misinformed.

another edit: how do hang gliders work then?

http://www.studyworld.com/newsite/ReportEssay/Science/Physical%5CThe_Principle_Of_Flight-381047.htm

An airplane flies because air, moving over and under itssurfaces particularly its wings, travels at different

velocities producing a difference in air pressure low above

the wing and high below it. The low pressure exerts a

pulling force and the high pressure a pushing force. The

lifting force, usually called lift, depends on the shape,

area, and tilt of the wind, and on the speed of the

aircraft. The shape of the wing causes the air streaming

above and below the wing to travel at different velocities.

The greater distance over which the air must travel above

the curved upper surface forces that air to move faster to

keep pace with the air moving along the flat lower surface.

According to Bernoulli's principle, it is this difference

in air velocity that produces the difference in air

pressure.

If you put the paper on, it's right, the plane would fly, but because of the fact that the conveyer is moving at the same speed but opposite direction as the thrust of the aircraft, the aircraft itself does not move forward but the two forces counteract themselves.

Since the forces counteract themselves, the plain stays stationary, hence no air moving over the wing. If there is no air moving over the surface of the wing, you can not create a low pressure zone. No difference between air zones= no lift. no lift = no flight

edit: physics, learn it.

physics > common sense.

 

[gHOstFaCe 10+ year member]

Yeah, but the wheel speed is 4. meaning that, dispite the conveyor moving against it at velocity of 2, the the plane is still moving forward at 2 velocity. That is why the wheels are spinning at 4. The wheel basically takes the conveyor out of the picture. So all you have is a forward thrust of 2 against a 0 air velocity.

 

[geonfreaq 10+ year member]

If you put the paper on, it's right, the plane would fly, but because of the fact that the conveyer is moving at the same speed but opposite direction as the thrust of the aircraft, the aircraft itself does not move forward but the two forces counteract themselves.
Since the forces counteract themselves, the plain stays stationary, hence no air moving over the wing. If there is no air moving over the surface of the wing, you can not create a low pressure zone. No difference between air zones= no lift. no lift = no flight

edit: physics, learn it.

physics > common sense.

Dude it does fly. Its already been established. And just incase you need to see furthe proof....

http://www.avweb.com/news/columns/191034-1.html > you.

 

[squeak9798 5,000+ posts]

hahaha... way to be misinformed.
another edit: how do hang gliders work then?

http://www.studyworld.com/newsite/ReportEssay/Science/Physical%5CThe_Principle_Of_Flight-381047.htm

If you put the paper on, it's right, the plane would fly, but because of the fact that the conveyer is moving at the same speed but opposite direction as the thrust of the aircraft, the aircraft itself does not move forward but the two forces counteract themselves.

Since the forces counteract themselves, the plain stays stationary, hence no air moving over the wing. If there is no air moving over the surface of the wing, you can not create a low pressure zone. No difference between air zones= no lift. no lift = no flight

edit: physics, learn it.

physics > common sense.

//content.invisioncic.com/y282845/emoticons/hilarious.gif.02a037aad04aa96f19982b298a3d70a8.gif//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

The conveyor belt isn't counteracting the thrust.

 

[jgarcia9102 10+ year member]

Pwnt By Pat, i already explained how an air foil works. look i the other thread. I was just trying to say that the plane pushed backwards to achieve thrust. I realise that the lift generated by the low pressure flowing over the foil is what makes the plane actually stay in the air. but you missed the point. Im not miss Informed, i just dont feel like typing an essay to re write what i have said in the other thread yesterdy.

 

[Patrick Simmons 10+ year member]

Wow! Information overload.

 

[myvanpounds 10+ year member]

ya the plane would take off but not because of the **** belt. but because the thrust would overcome the belt and in essence the plane would start moving forward since the wheels are free to spin this is becausr the plane is using the air to propel itself not the ground. the grownd has nothing to do with the plane taking off really. but still the plane would need a belt the length of a normal runway. now if we want to talk about wind thats a whole nother fun subject but say a plane takes of at 65 miles and hour what happens when you get a65mph gust of wind tward the aft of your plane?

 

[Moe Lester 10+ year member]

my conclusion to this and the other thread:

many many many of you are tards.

 

[jgarcia9102 10+ year member]

oh jeeze, now your throwing us the lingo....

didnt i say i wasnt gonna check this any more?

 

[gHOstFaCe 10+ year member]

The belt is a non factor in this equation......You will have the same result if the belt was not moving.

Either way, you will have a forward velocity of 2 and an air velocity of 0.

 

[myvanpounds 10+ year member]

wow I need grammar lessons

 

[1990black300zx 10+ year member]

edit: physics, learn it.
physics > common sense.

physics - YOU learn it. The thrust of the planes engine(jet, prop, ect, it makes NO difference) acts on the AIR, NOT the ground. The air, which is the medium that the planes forward thrust acts on, does NOT move with the conveyor belt. The plane WILL take off.

Will everyone just read this link already? It clearly explains why the plane WILL take off.

http://www.avweb.com/news/columns/191034-1.html