Will the plane take off?? Finally going to be answered.***

[espguitarist91 10+ year member]

Finally, Adam and Jamie carefully navigate their way through a myth that has baffled everyone from web bloggers to pilots. If a plane is traveling at takeoff speed on a conveyor belt, and the belt is matching that speed in the opposite direction, can the plane take off? Extensive small-scale testing with a super treadmill and a nearly uncontrollable model airplane don't completely resolve the myth, so our flight cadets supersize the myth with help from a willing pilot and his Ultralight flying machine.

Wouldn't this mean that the conveyor belt should match the speed of the plane, no matter the speed, making forward movement impossible?

 

[Acidburn 5,000+ posts]

Wouldn't this mean that the conveyor belt should match the speed of the plane, no matter the speed, making forward movement impossible?

read the thread numbnuts

 

[cpierce 5,000+ posts]

Wouldn't this mean that the conveyor belt should match the speed of the plane, no matter the speed, making forward movement impossible?

 

[espguitarist91 10+ year member]

thanks for the two very informative answers. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[cpierce 5,000+ posts]

thanks for the two very informative answers. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Anytime

 

[joetama 5,000+ posts]

Wouldn't this mean that the conveyor belt should match the speed of the plane, no matter the speed, making forward movement impossible?

The airplane is not attached to the treadmill!!!

Jesus you people are dense...

 

[IamDeMan 5,000+ posts]

OK it looks like nG has some banning to do. I also took the rule of no discussion to mean "none at all" not just discussion about the subject. Yet people still post in there and are discussing things. That seemed to be an easy rule to follow //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

I do hope he has some follow through. I can't believe he linked to this thread and people are still answering n in his.

 

[IamDeMan 5,000+ posts]

lol, rollerblades dont create lift. there is no way that would take off.

I lolled.

thanks for the two very informative answers. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

The informative answers are in this thread. So yes, telling you to read the thread is the best answer.

The airplane is not attached to the treadmill!!!
Jesus you people are dense...

NO WAI

 

[hoss 5,000+ posts]

Wouldn't this mean that the conveyor belt should match the speed of the plane, no matter the speed, making forward movement impossible?

the short answer is read the thread.

the correct answer is that it is not possible for the treadmill to make forward movement of the plane impossible unless the brakes are applied.

but im sticking with the "read the thread" reply for you.

 

[marineeagle28 10+ year member]

ok as an air traffic controller, i dont necessarily consider myself an expert on this matter by any means, however if plane is travelling at normal takeoff speed, and the conveyer belt is matching that speed in the opposite direction, the plane would not move, the wheels would spin, the plane would have no apparent movement where airspeed equals zero, plane will not take off. the wings need air to pass over the wings at the takeoff speed in order to produce lift to take the aircraft airborne.

 

[JLJunkieMX107 10+ year member]

ok as an air traffic controller, i dont necessarily consider myself an expert on this matter by any means, however if plane is travelling at normal takeoff speed, and the conveyer belt is matching that speed in the opposite direction, the plane would not move, the wheels would spin, the plane would have no apparent movement where airspeed equals zero, plane will not take off. the wings need air to pass over the wings at the takeoff speed in order to produce lift to take the aircraft airborne.

x2. This is simple physics, why can't people grasp the fact that in order for a plane to take off it needs air moving over the wings!!!!!! The plane will act just like the skateboard in this video http://www.youtube.com/watch?v=aVg0VtQvBJs .

 

[hoss 5,000+ posts]

good god, the idiots just keep coming //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

if takeoff speed = 100 mph (making up a number)

treadmill speed would equal -100 mph (in other words, 100 mph in the opposite direction)

airplanes wheels would be turning at the speed equivelant to the plane moving at 200 mph

the plane itself will be moving at 100 mph

unless the plane has another force holding it stationary, it is impossible for a treadmill to keep it from moving...

and jljunkiemax, people DO understand this "simple physics", however its even more simplistic physics that you two are overlooking...

 

[DBfan187 5,000+ posts]

http://stereoroid.com/2006/12/21/conveyor-belt-plane/

The question is framed badly - a bit like an “irresistible force vs. immovable object”. The first key point, which most people get, is that the engines are pushing against the air, not driving the wheels, which spin freely with a small amount of friction. This should make the answer easy, if you think in terms of Forces: the plane is trying to move forward, what would hold it back? Not friction - far too small a force. The plane moves forward, and eventually takes off, regardless of whatever the belt is doing.

 

[DBfan187 5,000+ posts]

planes prop forces air over the wings, it will fly.

 

[Chevillac 5,000+ posts]

ok as an air traffic controller, i dont necessarily consider myself an expert on this matter by any means, however if plane is travelling at normal takeoff speed, and the conveyer belt is matching that speed in the opposite direction, the plane would not move, the wheels would spin, the plane would have no apparent movement where airspeed equals zero, plane will not take off. the wings need air to pass over the wings at the takeoff speed in order to produce lift to take the aircraft airborne.

Let me ask you this, can a plane take off on ice? can a plane take off on water?

What the plane is sitting on has nothing to do with the movement of the plane.

x2. This is simple physics, why can't people grasp the fact that in order for a plane to take off it needs air moving over the wings!!!!!! The plane will act just like the skateboard in this video http://www.youtube.com/watch?v=aVg0VtQvBJs .

With that video you just proved yourself wrong. Did you see the skateboard moving forward a few times? Obviously he wall holding onto something, had he kicked he would have moved forward, to the limit of the treadmill. planes do not move because of the power to the wheels, because there isnt any power given to the wheels. That skateboard video was pointless for your argument.

both of you, watch these videos......





I think this is the 4th or 5th time ive posted these.

Also there is a link in the first post, vote there if you are sure.