Plane on a Conveyer Belt

[UndercoverPunk 5,000+ posts]

I feel like I'm in a room filled with Miss Teen USA hopefuls.

 

[IamDeMan 5,000+ posts]

I feel like I'm in a room filled with Miss Teen USA hopefuls.

Hi my name is rain and I want to cure world hunger. Do you like the dress I bought for the pageant?

 

[konechiwa 10+ year member]

Hi my name is rain and I want to cure world hunger. Do you like the dress I bought for the pageant?

if we all work together we can accompish anything!

 

[IamDeMan 5,000+ posts]

This is concrete ya'll

People tried to say I would fall

I be hittin you up with knowledge

Even though bishes say I can't attend college

I don't need math or physics

To show you I'm with it

You keep going on trying to imply

While I know that bish won't fly

 

[ngsm13 5,000+ posts]

This is concrete ya'llPeople tried to say I would fall

I be hittin you up with knowledge

Even though bishes say I can't attend college

I don't need math or physics

To show you I'm with it

You keep going on trying to imply

While I know that bish won't fly

Lol...

nG

 

[UndercoverPunk 5,000+ posts]

Lawls.

 

[maldecido33 10+ year member]

not much of a math wizard but saying if the belt is moving at take off speed (idk lets say 120mph) and the plain was not started it would be moving backwards at 120 mph.(sounds stupid i know and probably wouldt sit still) but if the plain engine was started and got to take off speed (same as belt) it would become stationary like a hamster on a treadmill, moving but sationary. it would then need to accelerate to 220 to achieve a momentum or actual speed of 120 with relevance of air speed. i hope im being clear

Wrong. And even if your idea were right, 120x2 would be 240, not 220.

 

[Fast1one 10+ year member]

I see the point being made. The plane and thrust is no reliant on the belt. PERIOD. If it was flying. But I think it add more to it when you make a connection between the plane and the belt.
PLANE

_____

obviously if the plane is flying over the belt, it will have no effect on the plane at all.

--

And I think that with the wheels actually sitting on the belt (regardless of wheel speed), that the plane will not be able to take off.

HOWEVER

I do see what you guys are implying, but I think that you do not understand what difference the connection between the plane and belt are making. The wheel structure acts as bridge between them, with the wheels there to allow movement and reduce friction. That bridge provides a connection between ground and air speed, and because it has that connection, it has to apply to ground speed until it has enough speed to overcome the ground, and become an object relative to air speed.

There is no connection, there is no black magic, they are TWO SEPARATE FORCES YOU TARD!!!
______________________________________________>

Pretend the above is the thrust of a plane in vector format, big...disregard the treadmill for now


Pretend the above two are wind resistance and WHEEL resistance (or friction) with the ground. The propeller or jet engine has to overcome these to take off. They obviously increase with speed, we will establish that those are the values once the plane reaches take off speed.

Now lets add the treadmill. It's going in the opposite direction, matching the speed of the plane as it starts moving, which means the wheels will spin TWICE as fast. The force now looks like this


A little bigger, because there is more friction due to the wheels spinning faster, its more than likely not double, because friction relative to speed is not linear...

As long as the plane can overcome the added friction, IT WILL TAKE OFF. Now if you have the treadmill spin very quickly, then the friction may impede and overcome the thrust of the plane.

 

[DBfan187 5,000+ posts]

-1 for potato wedgie

 

[bikinpunk 10+ year member]

I have no idea what this setup is that you guys are talking about. I'm not going to read 8 pages of arguing to figure out wtf this setup is. But, since alot of people don't seem to understand the simple reasons why a plane will fly to begin with...

Lift is caused by pressure differential over & under a plane's wing. Bernoulli's equation. The pressure is inversely proportional to local velocity. Ideal Gas Law. As velocity of the air under the wing increases, pressure decreases... part1. part2... shape of an airfoil (wing) determines velocity under & over the wing. So, a wing with a flat bottom has higher velocity under the wing than it does over the wing (assuming it's not symmetrical, which it shouldn't be unless you don't want to fly) so you now have higher pressure under the wing than you do over the wing. High pressure below=bouyancy. Bouyance=lift.

So, it doesn't matter how the air moves under the wing, all that matters is that it does. So, essentially lift is due to velocity at the wing. With the proper velocity & airfoil shape you can get the plane off the ground.

So, now say you've put a plane on wheels and push it. You have velocity at the wings. This is the same situation as if you put a plane in a shopping cart, or on a conveyor. You get lift because you get velocity.

Edit: I'm dyslexic.

 

[qtipextra 5,000+ posts]

I am not going to attempt to expain my reasoning behind my opinion. It is apperant that none of you see what I am actually trying to get accross. This may be due to the fact that I am not explaining my point very good. Either way, we will find out on the 30th.

 

[W8 a minute 10+ year member]

I had a hard time wrapping my head around it but I think I have to change my mind. The plane will take off.

 

[UndercoverPunk 5,000+ posts]

Either way, I will find out on the 30th.

Corrected. //content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

 

[konechiwa 10+ year member]

look at it this way.

Your on a treadmill running. You go nowhere right? Your legs are the driving force.

You strap a jetpack onto your back. Turn it on. Does it matter what your legs do at this point? even if they are on the treadmill, your going forward. You're not going to backward because the treadmill is pushing your legs back. Your going to be moving forward.

The wheels on the plane have absolutely nothing to do with it.

Horrible example, but the point is the wheels don't drive the plane.

 

[Fast1one 10+ year member]

look at it this way.
Your on a treadmill running. You go nowhere right? Your legs are the driving force.

You strap a jetpack onto your back. Turn it on. Does it matter what your legs do at this point? even if they are on the treadmill, your going forward. You're not going to backward because the treadmill is pushing your legs back. Your going to be moving forward.

The wheels on the plane have absolutely nothing to do with it.

Horrible example, but the point is the wheels don't drive the plane.

Thats actually one of the best examples I have heard yet...

I am not going to attempt to expain my reasoning behind my opinion. It is apperant that none of you see what I am actually trying to get accross. This may be due to the fact that I am not explaining my point very good. Either way, we will find out on the 30th.

What the hell are you trying to explain then?