162 replies to this topic

[F16-USAF]

Well i wasnt quite sure where to put this, then figured you guys would know the most.

Say a plane, any plane (jet, airliner, single prop), was going to take off. The runway was replaced with a huge conveyor belt. As the aircraft throttled up the belt matched its speed, except backwards so that the plane was at full throttle but not moving because the conveyor matched its speed in the opposite direction. If this were to be tried could the aircraft take off?

My thoughts: I say no because since the aircraft isnt moving no air is passing through the wings, thus providing no lift even though the aircraft is at full power.

Also landing... the conveyor belt matches the aircrafts speed while its on final, only its going toward the approacing aircraft. Once the aircraft lands on the conveyor will it come to a complete stop in about 2-3 feet because of the conveyor matching its speed in the opposite direction?

My thoughts: I say yes, it will come to a complete stop in a few feet. It just seems like basic logic to me.

Post up your arguments/questions/comments.  

[Chief_Bean]

Yes it will, end of, no more discussion needed.

Oh and this is like the sixth thread on this i've read at this forum

Edited by Chief_Bean, 31 December 2006 - 05:56 PM.

[Kentaro]

not this again

[Prancer]

My answer: WHO CARES!?

[Chief_Bean]

Zarquen, on Dec 31 2006, 11:16 PM, said:

My answer: WHO CARES!?

You never know Zarquen, you might just happen to find yourself lined up on what you think is a runway, when it turns out that it's actually a giant conveyor belt and you start to wonder if you will be able to take off...

[F16-USAF]

Chief_Bean, on Dec 31 2006, 06:21 PM, said:

Zarquen, on Dec 31 2006, 11:16 PM, said:

My answer: WHO CARES!?

You never know Zarquen, you might just happen to find yourself lined up on what you think is a runway, when it turns out that it's actually a giant conveyor belt and you start to wonder if you will be able to take off...

EXACTLY!

don't be so hard on me jesus

and how the ###### will it be able to take off again?

it just doesnt seem right if i put a 747 on a conveyor belt it can become a VTO 747

EDIT- i want a demonstration!

Edited by F16-USAF, 31 December 2006 - 06:27 PM.

[Tako]

This has been posted before, and I got in a lot of trouble...

Just take my word for it...

It can take off

[Chief_Bean]

F16-USAF, on Dec 31 2006, 11:24 PM, said:

Chief_Bean, on Dec 31 2006, 06:21 PM, said:

Zarquen, on Dec 31 2006, 11:16 PM, said:

My answer: WHO CARES!?

You never know Zarquen, you might just happen to find yourself lined up on what you think is a runway, when it turns out that it's actually a giant conveyor belt and you start to wonder if you will be able to take off...

EXACTLY!

don't be so hard on me jesus

and how the ###### will it be able to take off again?

it just doesnt seem right if i put a 747 on a conveyor belt it can become a VTO 747

EDIT- i want a demonstration!

OK, the conveyor belt won't stop the plane from moving, it will take off We did have a video to prove it, maybe you could ask 89-LX for a link to it

[Tako]

The only issue, would be that the tires could burn out, due to the max rotational speed. The airplane is moving at a speed of 130 knots, plus 20 knots of the belt rotating in the opposing direction. thus, the tires are rotating as if the airplane was moving at 150 knots.

[CAT19_Hitman]

F16-USAF, on Dec 31 2006, 03:24 PM, said:

and how the ###### will it be able to take off again?

it just doesnt seem right if i put a 747 on a conveyor belt it can become a VTO 747

An airplane's forward motion is due to the thrust of the engines. The wheels are not "motorized" like on a car.

The plane will eventually take off. It will probably blow out a few tires before it does but it will take off.

[Nick.]

btw Hitman hit the nail on the head

[F16-USAF]

CAT19_Hitman, on Dec 31 2006, 06:44 PM, said:

F16-USAF, on Dec 31 2006, 03:24 PM, said:

and how the ###### will it be able to take off again?

it just doesnt seem right if i put a 747 on a conveyor belt it can become a VTO 747

An airplane's forward motion is due to the thrust of the engines. The wheels are not "motorized" like on a car.

The plane will eventually take off. It will probably blow out a few tires before it does but it will take off.

i didn't say tire speed
the conveyor matches the speed at which the plane would go, or wants to go.......it wouldnt take off it'd loose all the tires

if the belt matches the speed at which the plane would be going the plane would not move, no air would be going through the wings...which provides NO lift.....even by some magical force if it were to gain on the conveyor it would blow out the tires

Edited by F16-USAF, 31 December 2006 - 06:51 PM.

[Tako]

http://www.fs2004.co...14&hl=treadmill

333 posts, video is there somewhere

EDIT: FYI: don't use "Jap" on this forum, it really ticks people (including me) off.

the link is shot too

Edited by tako, 31 December 2006 - 06:57 PM.

[F16-USAF]

ok so ive been overruled, ###### mythbusters get another plane to do this with!!!

lets talk the landing theory, but lets make that conveyor go twice as face as the aircraft in the opposite direction

EDIT- that video in the 2nd to last page of that debate is an old and broken link

Edited by F16-USAF, 31 December 2006 - 07:03 PM.

[googlerSA]

yes...conveyor belts and runways...i see the connection

thats gotta have one good/fast motor to beat an airplane

interesting stuff for debate

[wyoairbus]

Chief_Bean, on Dec 31 2006, 05:41 PM, said:

Yes it will, end of, no more discussion needed.

Oh and this is like the sixth thread on this i've read at this forum

if mean yes the plane will take off, that is wrong.

With no airflow over the wings that sucker aint goin nowhere

[N3123V]

Oh for crying out ###### loud, not this AGAIN.

[Mr. Schutte]

The wheels are spinning, but their the air is not moving over the wings any faster, therefore, the aircraft will not fly. No wind, no lift, no fly.

[N3123V]

Mr. Schutte, on Dec 31 2006, 11:45 PM, said:

[IMG ]http://images.fs2004...alien_jW4eD.jpg[/IMG]


The wheels are spinning, but their the air is not moving over the wings any faster, therefore, the aircraft will not fly. No wind, no lift, no fly.

The wheels don't necessarily determine how fast the plane moves. The wheels would move at the speed that the aircraft is moving at PLUS the speed at which the supposed "conveyor belt" is moving, therefore still resulting in the plane moving forward.

[dolbinau]

Quote

i didn't say tire speed
the conveyor matches the speed at which the plane would go, or wants to go

It is meant to be tire speed.

Yes, it will takeoff.