- My Forums
- Tiger Rant
- LSU Score Board
- LSU Recruiting
- SEC Rant
- SEC Score Board
- Saints Talk
- Pelicans Talk
- More Sports Board
- Coaching Changes
- Fantasy Sports
- Golf Board
- Soccer Board
- O-T Lounge
- Tech Board
- Home/Garden Board
- Outdoor Board
- Health/Fitness Board
- Movie/TV Board
- Book Board
- Music Board
- Political Talk
- Money Talk
- Fark Board
- Gaming Board
- Travel Board
- Food/Drink Board
- Ticket Exchange
- TD Help Board
Customize My Forums- View All Forums
- Show Left Links
- Topic Sort Options
- Trending Topics
- Recent Topics
- Active Topics
Started By
Message
re: Myth Busters/Can a plane take off on a conveyor belt
Posted on 12/4/07 at 12:03 pm to Colonel Hapablap
Posted on 12/4/07 at 12:03 pm to Colonel Hapablap
quote:
Also, the frictionless nature of the wheels in the original question is completely blasted when you try to do the experiment.
I think the friction will have a mostly negligible impact when compared to the speed planes require to take off. The friction is still present when the runway is stationary, it will be amplified on a treadmill, but shouldn't affect the overall experiment.
Posted on 12/4/07 at 12:05 pm to MikeBRLA
quote:
The conveyor belt is a red herring
not necessarily. the wheels on the plane wont just spin freely, so as the plane builds up airspeed, the conveyer is going to counteract that with a tailwind that is equal to the planes airspeed (theoretically if they set it up right) which lengthens the runway needed to take off by a pretty good bit. at first I thought it would takeoff but after thinking about it I am not so sure.
Posted on 12/4/07 at 12:06 pm to LSUBoo
It would make it tough to get the experiment running, but in the end I guess it'd just mean that the conveyor belt would be traveling a little faster than takeoff velocity.
Posted on 12/4/07 at 12:10 pm to Colonel Hapablap
quote:
It would make it tough to get the experiment running, but in the end I guess it'd just mean that the conveyor belt would be traveling a little faster than takeoff velocity.
Probably... or the plane will need to be travelling a little faster than usual to get enough lift to take off?
Posted on 12/4/07 at 12:11 pm to LSUBoo
quote:
Probably... or the plane will need to be travelling a little faster than usual to get enough lift to take off?
You're falling for it... Airspeed is airspeed and takeoff velocity is relative to the air, not the wheels.
Edit to make more sense:
the jets will have to push harder, but the plane will ultimately be traveling at the same velocity as it would with frictionless wheels, or ice skates, or a cushion of air, or whatever else.
This post was edited on 12/4/07 at 12:13 pm
Posted on 12/4/07 at 12:13 pm to ags01
Posted on 12/4/07 at 12:14 pm to Colonel Hapablap
quote:
You're falling for it...
Airspeed is airspeed and takeoff velocity is relative to the air, not the wheels.
Kind of. The wheels still do transfer some drag from friction to the plane's overall speed as it's touching the runway. It's just negligible in the overall problem due to the tremendous thrust jet engines are capable of.
Posted on 12/4/07 at 12:14 pm to FlyinTiger
The problem is that there are about 1000 misunderstandings about the problem, so making one part of it clear doesn't make the other 999 make sense.
Posted on 12/4/07 at 12:16 pm to LSUBoo
again, the jets will push harder, but takeoff velocity is takeoff velocity, and that won't change because of wheel friction. You could put concrete skids on the plane (or something with a high coefficient of kinetic friction) and the takeoff velocity would be the same. The runway might have to be longer, though.
Posted on 12/4/07 at 12:20 pm to Colonel Hapablap
quote:
again, the jets will push harder, but takeoff velocity is takeoff velocity, and that won't change because of wheel friction. You could put concrete skids on the plane (or something with a high coefficient of kinetic friction) and the takeoff velocity would be the same. The runway might have to be longer, though.
Well at some point (and I think concrete skids would be past this point!) the friction would be enough to keep the plane from taking off. But standard tires are obviously designed for the plane to be able to take off, although their primary designed function is for landing safely.
Posted on 12/4/07 at 12:22 pm to LSUBoo
quote:
Well at some point (and I think concrete skids would be past this point!) the friction would be enough to keep the plane from taking off.
Only if the static friction is more than the maximum output of the jets and the runway isn't long enough.
Posted on 12/4/07 at 12:25 pm to Colonel Hapablap
quote:
Only if the static friction is more than the maximum output of the jets and the runway isn't long enough.
Right. At some point, the friction is enough to where the jet engines can't push the plane forward (or can't reach enough speed) for it to take off.
But that's really irrelevant in the problem at hand, because the friction in the plane's tires is negligible and won't 'connect' the plane itself to the treadmill.
Posted on 12/4/07 at 12:27 pm to Colonel Hapablap
Boo and Hapablap -
I'm glad to see that you are continuing to run off the morons who think the plane wouldn't fly.
Keep up the good work.
PS - What is the Droppie for the smartest poster?
I'm glad to see that you are continuing to run off the morons who think the plane wouldn't fly.
Keep up the good work.
PS - What is the Droppie for the smartest poster?
Posted on 12/4/07 at 12:29 pm to just me
quote:
Keep up the good work.
No problem.
quote:
PS - What is the Droppie for the smartest poster?
I've never paid any attention to the Droppies. I don't do enough IRLing to be considered. ETA: Dammit, there I go using internet shorthand... frick.
Posted on 12/4/07 at 12:30 pm to just me
Check the poli board. Rex apparently has it locked up. Maybe it should even be renamed to "The Rex" in honor of him.
Posted on 12/4/07 at 12:31 pm to Colonel Hapablap
quote:
Maybe it should even be renamed to "The Rex" in honor of him.
Well, there's an award I'd rather not win, if that's the case!
Posted on 12/4/07 at 12:32 pm to LSUBoo
internet shorthand is OK, it's the texting shorthand that is obnoxious. Leet is ok, but generally only when making fun of leet.
Posted on 12/4/07 at 12:36 pm to Colonel Hapablap
The Droppie should go to an OT'er for once.
This thread is my thesis.
This thread is my thesis.
Posted on 12/4/07 at 12:37 pm to RummelTiger
quote:
Hey, everyone...
LOOK AT THE NERD!!!
2
Posted on 12/4/07 at 12:40 pm to just me
quote:
The Droppie should go to an OT'er for once.
A pure OTer? I have a hard time with that. Maybe someone who posts in a bunch of places including the OT. But to post only on the OT is evidence of brain damage.
Page 9 of 29
Popular
Back to top
Follow TigerDroppings for LSU Football News