^^^^^

It wouldn't matter if the treadmill were going 1,000 mph. The angular acceleration of the wheels + the resistive force of wheel friction would have to equal the thrust of the plane.

If the treadmill is going at a constant speed then the only resistive force is friction, which is negligible until the treadmill is traveling at incredible speed. The only way to hold the plane still is to ACCELERATE the wheels via the treadmill at a TREMENDOUS rate. If someone could get the the following information I can calculate what it would take (angular acceleration of wheels, linear acceleration of treadmill, etc.) to hold the plane still on level ground:

- Number of wheels
- Moment of inertia of each wheel about axis of rotation
- Radius of each wheel
- Thrust generated by engine (either prop. or jet)

You will find this number to be tremendous compared to the actual values of a plane accelerating on a stationary runway (which I can calculate given the mass of the plane in addition to the above information).

1/30/2008 9:12:20 PM

Yeah, I imagine that, compared cheap car tires, airplane tires probably have a lot more safety margin built into them relative to what is normal. Otherwise you'd probably hear about a lot more on-runway accidents during rushed landings, inclement weather, etc.

Quote :

"It wouldn't matter if the treadmill were going 1,000 mph. "

Sort of. I don't think the wheels or bearings are going to like being pushed to 5-10 times the speeds they were engineered for. But yeah, the treadmill force isn't the limiting factor here, it's the landing gear/wheels/tires failing due to excessive rotation. As was pointed out, 2x normal probably isn't going to do anything bad to them during this short test.

[Edited on January 30, 2008 at 9:14 PM. Reason : ]

1/30/2008 9:12:41 PM

Holy fuck

you people

1/30/2008 9:12:47 PM

do you know the answer, ambrosia?

1/30/2008 9:13:35 PM

OH MY GOD IT MOVED

NO FUCKING WAY

1/30/2008 9:15:32 PM

tee hee

1/30/2008 9:16:23 PM

There aren't any won't-flyers left though are there?

1/30/2008 9:17:33 PM

id love to sleep with that girl

as long as she didnt talk about science, or have those other dudes over to hang out.

also, i think the roaches in the nuclear war thing is more interesting

1/30/2008 9:19:01 PM

Carrie could def. get it.

1/30/2008 9:19:59 PM

^^ yeah the roaches thing is pretty neat.

[Edited on January 30, 2008 at 9:20 PM. Reason : ]

1/30/2008 9:20:15 PM

^^You mean "Kari" would get it

[Edited on January 30, 2008 at 9:22 PM. Reason : not a big fan of the new haircut...she would still get it]

1/30/2008 9:21:06 PM

it took off... now the theory....cars and airplanes are different, dumbasses.

[Edited on January 30, 2008 at 9:25 PM. Reason : .]

1/30/2008 9:25:10 PM

^^ yeah fake red hair = lose (but still hot)

[Edited on January 30, 2008 at 9:25 PM. Reason : ]

1/30/2008 9:25:12 PM

wtf is this blanket on the ground bullshit?

1/30/2008 9:26:26 PM

i feel like a fucking dumbass for even tuning in to this

DURRRRRRRRRRRRRRRRRRRRRRR IT FLIES

1/30/2008 9:26:35 PM

Quote :

"wtf is this blanket on the ground bullshit?"

Maybe incase the landing gear or wheels failed? Meh I don't have it on so I don't know.

1/30/2008 9:28:38 PM

Quote :

"wtf is this blanket on the ground bullshit?"

from the preview video on youtube, they indicated that to try it with a full sized plane they were going to do something like drag a tarp behind a truck.
Theoretically, this can provide the same effect, but to satisfy the idiots skeptics, it's going to require a prohibitively long tarp....

1/30/2008 9:30:37 PM

i know what it is

but the myth isn't plane flies on a tarp....

also, just to be anal, they're not really tracking the speed of the tarp vs the speed of the plane...

1/30/2008 9:32:27 PM

you get the fucking point

1/30/2008 9:33:50 PM

The following:

drunknloaded
Oeuvre
mrfrog
raiden
Shaggy
gk2004
bigun20
BDubLS1

etc.

have been called the fuck out for being faggots who probably are in CHASS and don't understand basic fucking physics.

1/30/2008 9:34:27 PM

aha

"Nuthin."

1/30/2008 9:36:22 PM

also

Walter
SandSanta

1/30/2008 9:36:42 PM

so what happened? did it work? not gonna watch that show.

1/30/2008 9:37:54 PM

yeah it worked

1/30/2008 9:38:35 PM

here goes the full-scale test

1/30/2008 9:38:38 PM

i think we are missing the point

kari would get it

1/30/2008 9:38:52 PM

wait what...that yellow airplane only goes 25 mph on takeoff?

1/30/2008 9:40:20 PM

oh shit

he has a segway!

i now have the urge to go ride a segway on an airport moving sidewalk

1/30/2008 9:40:31 PM

True



[Edited on January 30, 2008 at 9:42 PM. Reason : i think the new haircut looks alright..]

1/30/2008 9:41:33 PM

^^^Its just an ultralight. Still a plane for the purposes of the test.

[Edited on January 30, 2008 at 9:42 PM. Reason : ]

1/30/2008 9:42:23 PM

yea but thats pretty damn slow lol

1/30/2008 9:42:47 PM

Well its only 400 pounds, with 100 of that being motor.

1/30/2008 9:43:22 PM

did they just say that 30% survived 10,000R, but 50% survived 100,000R?

wat?

1/30/2008 9:51:33 PM

I can't believe a television show has an attractive woman on it.

1/30/2008 9:53:19 PM

this pilot is an idiot

1/30/2008 9:56:19 PM

this pilot is an idiot

1/30/2008 9:56:26 PM

ahahahahahah

1/30/2008 9:56:45 PM

RUNAWAY SEGWAY!

1/30/2008 9:57:57 PM

BOOYA!!!!!!!!!!

1/30/2008 9:58:01 PM

TAKE THAT

1/30/2008 9:58:02 PM

take away his pilots license for not understanding the principals of physics.

1/30/2008 9:58:08 PM

pilot is idiot

1/30/2008 9:58:15 PM

Now this thread needs to end.

IT

NEEDS

TO

FUCKING

END

1/30/2008 9:58:42 PM

no, he said if "there is no airflow over the wing, then he will sit there like a brick"

1/30/2008 9:59:14 PM

ahaha what a disgraceful, dumbass pilot

1/30/2008 9:59:17 PM

no one would listen to the NASA engineer, but it took those 2 goons on tv before people would listen?

tww

1/30/2008 10:00:09 PM

basically

1/30/2008 10:03:03 PM

Or a fucking military pilot, or the other few guys who are pilots on here. I guess we didn't know as much as somebody who took a Southwest flight once when they were four.

1/30/2008 10:03:21 PM

where is SandSanta

1/30/2008 10:04:38 PM

set em up

[Edited on January 30, 2008 at 10:08 PM. Reason : ]

1/30/2008 10:07:10 PM