Did no-one see the pretty picture I make?
DBfan187
5,000+ posts
Supa's mom was here!
you should read your email
ngsm13
5,000+ posts
BSEE
Lol...
nG
nG
RAM_Designs
5,000+ posts
SketchUp Master
I thought that lift was created like so:
The distance from the front of a wing to the back of the wing is different depending on which route you go. It's a shorter distance going underneath the wing than going over the wing. It's important to remember that it takes the air the SAME amount of time to go over the wing as it does to go under.
This being said, it's obvious that the air going over the wing it moving faster than the air going under. The faster air moves, the lower the air pressure within that particular air. Air naturally wants to be in an eqalized, or stable state. So, in order for the air to do that, the higher pressure underneath the wing is trying to push upward to equalize the lower pressure above the wing(air pressure always moves from high to low).
Now you have lift....right?
The distance from the front of a wing to the back of the wing is different depending on which route you go. It's a shorter distance going underneath the wing than going over the wing. It's important to remember that it takes the air the SAME amount of time to go over the wing as it does to go under.
This being said, it's obvious that the air going over the wing it moving faster than the air going under. The faster air moves, the lower the air pressure within that particular air. Air naturally wants to be in an eqalized, or stable state. So, in order for the air to do that, the higher pressure underneath the wing is trying to push upward to equalize the lower pressure above the wing(air pressure always moves from high to low).
Now you have lift....right?
I get what everyone is saying with this myth now. But I cant really decide on which one would be more true. Im going with the fact that the plane wont take off because even though the wheels isnt where the source of power is coming from it still is what gets the plane moving, and if its on a free moving conveyor belt that can always match the speed of the plane in the reverse direction then it wont move. But most conveyor belts arent like this so its really is a good chance that the plane can still move foward even on the conveyor belt. Sorry I cant really explain my idea good but Im neutral with this myth because both can happen with the right settings.
SethPhillips
5,000+ posts
I'sa Playa
i say it will take off..
i say it wont take off..
Wheels do not get a plane moving.
RAM_Designs
5,000+ posts
SketchUp Master
They'll be matching the conveyor belt like this, from what I understand...
However much thrust the engine(s) are creating(in order to make the plane go a certain speed), that's the speed at which they will have the treadmill going. So if the plane is producing enough thrust for it to go 100 MPH, then the treadmill will be adjust accordingly to 100 mph...
With that being said, the plane will easily take off since the force of air is what moves the plane, not the force of the wheels(remember, planes aren't wheel driven //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif)
RAM_Designs
5,000+ posts
SketchUp Master
I say you're retarded.
I can understand that they may mess up the experiment to where it won't be able to take off, but in theory and physics, it will take off...it jst depends if they can make it happen.
This is more of a test of their ability to make something that's already proven, happen.
qtipextra
5,000+ posts
The Original
You have a long ways to go.
I myself thought that too. But that is wrong. It WILL fly!
Yea I think Im starting to really agree with the point that it can fly. But only with certain conditions. What got me thinking differently was the skateboard on a treadmill comment. Ive done this before a couple of years ago and as long as i kept enough force on the skateboard no matter how fast I turned up the treadmill it would never move. But after I turned it up to the max it was still very easy to push the skateboard forward on the treadmill. Same thing really applies to a plane because the thrust of the engine is acting the same way my hand on the skateboard did. It just really depends on how much thrust the plane can produce. Also with the video posted earlier in the pages where the guy has a paper plane with a prop on the treadmill you can see the plane is moving and not stay stationary which means that a jet can do the same thing and most likely do it better. All it has to do is overcome the opposing force of the conveyor belt. In real world applications I believe the plane can take off because of all the other factors that can cause the belt to not be able to keep up with thrust of the engine.
.
.
The wheels are not what get a plane moving. In fact, a plane could have no wheels and if you crank up the thrust it will slide across the ground on its belly.
Foir this question, if you assume the conveyor belt is long enough, and that the wheels and tires would not fail due to friction/heat, then you could actually run the conveyor belt 10 times (probably 100 times) faster than the plane itself and it would still take off.
Interestingly enough, in a real world application, the tires and wheels would likely fail causing disaster. I think a large jet needs to get up to around 175 mph to take off (not sure, so correct me if I'm way off). If the conveyor belt spins at a matching 175, then the wheels would spin at 350 mph. They are not made to withstand that kind of speed.
One last thing to think of for the "it won't fly" people. If the plane stays still, then it has no speed. If it's not moving forward, that's simply 0 mph. In order for the conveyor to have anything to match in the first place, the plane must move forward. Otherwise they both sit there not moving at all, which makes no sense once you introduce thrust.
david in german
10+ year member
CarAudio.com Elite
hehe, just got another one for the collestion. (Punch 75 pre HD)//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif
Activity
No one is currently typing a reply...
About this thread
