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Started By
Message
re: Myth Busters/Can a plane take off on a conveyor belt
Posted on 12/6/07 at 12:41 pm to MulesAFpilot
Posted on 12/6/07 at 12:41 pm to MulesAFpilot
quote:
Cocomo, what's your background?
Anglo-Saxon.
Posted on 12/6/07 at 12:49 pm to CocomoLSU
Even if you had a big arse fan emulating wind resistance on the treadmill, that resistance wouldnt be 10 feet above where you took off, therefore you drop like a rock because you still havent achieved the speed neccessary to fly. That sound right?
This post was edited on 12/6/07 at 12:50 pm
Posted on 12/6/07 at 12:52 pm to MulesAFpilot
quote:
Cocomo, what's your background?
he's from Baker ... nuff said
Posted on 12/6/07 at 12:55 pm to ags01
If it is all about lift and wind velocity (not ground velocity), then would a parked plane take off in a hurricane if there is a constant head wind of 100mph or so?
Assume the airfoils are properly placed.
Assume the airfoils are properly placed.
Posted on 12/6/07 at 12:57 pm to Putty
quote:
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?
They need to clarify this. I take this to mean it is setup like me walking on a treadmill. If so, then the plane can't lift off.
Posted on 12/6/07 at 12:59 pm to SG_Geaux
Updated, since coco apparently does get it.
Colonel Hapablap
just me
Powerman
LSUBoo
aggie dude who started the thread
Putty
Jimbeaux
Coco
xLxSxUxFxAxNx
---karma line---
VanRich
diat150
MulesAFPilot (he gets extra points since he's a pilot)
SCTiger
SG_Geaux
Dale Murphy
faxis
penthouse (extra points here as well)
there was another pilot in the list too.
RAGINTIGER
ETA: I'm not sure if Casty gets it, but he at least appears to think that the plane will take off.
ETA2: xie has clarified
Colonel Hapablap
just me
Powerman
LSUBoo
aggie dude who started the thread
Putty
Jimbeaux
Coco
xLxSxUxFxAxNx
---karma line---
VanRich
diat150
MulesAFPilot (he gets extra points since he's a pilot)
SCTiger
SG_Geaux
Dale Murphy
faxis
penthouse (extra points here as well)
there was another pilot in the list too.
RAGINTIGER
ETA: I'm not sure if Casty gets it, but he at least appears to think that the plane will take off.
ETA2: xie has clarified
This post was edited on 12/6/07 at 1:26 pm
Posted on 12/6/07 at 1:00 pm to Colonel Hapablap
colonel, what is that list of?
Posted on 12/6/07 at 1:01 pm to NYC Tiger
intelligent people
---karma line---
morons
---karma line---
morons
Posted on 12/6/07 at 1:02 pm to LSUBoo
so you are saying a plane without a vertical propultion system can take off without moving forward?
Posted on 12/6/07 at 1:03 pm to xLxSxUxFxAxNx
quote:
so you are saying a plane without a vertical propultion system can take off without moving forward?
no
Posted on 12/6/07 at 1:03 pm to CocomoLSU
quote:
The problem some had before with this was that if this mythical conveyor belt could spin as fast as the wheels (created by the propulsion from the jets), the plane would not move. That's why with this example, if the plane is "travelling at takeoff speed" then it will fly.
Yes, the first time I saw this 'problem' on the OT whoever asked it said that the treadmill was matching the speed of the wheels, as opposed to the plane's takeoff speed. In that case, it would be impossible to take off... it would be just like if the plane had a huge chain holding it to a mountain... it can't move, it can't take off.
In this case, the plane is free to move, so of course it takes off. The wheels are just working double-time because the treadmill/runway is moving in the opposite direction.
Posted on 12/6/07 at 1:04 pm to Putty
quote:
Cocomo, what's your background?
he's from Baker ... nuff said
Posted on 12/6/07 at 1:05 pm to xLxSxUxFxAxNx
quote:
so you are saying a plane without a vertical propultion system can take off without moving forward?
of course not, are you saying a plane that's on a treadwill WON'T move forward?
Posted on 12/6/07 at 1:06 pm to LSUBoo
quote:
In that case, it would be impossible to take off... it would be just like if the plane had a huge chain holding it to a mountain... it can't move, it can't take off.
no...
Posted on 12/6/07 at 1:07 pm to Colonel Hapablap
after 17 pages have you men figured this out or not?
i thought there were a lot of engineers on here. guess they are all at lunch still.
i thought there were a lot of engineers on here. guess they are all at lunch still.
Posted on 12/6/07 at 1:08 pm to tigernurse
see the list of those who have figured it out.Posted on 12/6/07 at 1:09 pm to Colonel Hapablap
quote:
no...
I'm talking about the impossible scenario where the treadmill matches the wheel speed... which is of course impossible because the wheels and treadmill would accelerate to infinity.
Posted on 12/6/07 at 1:10 pm to LSUBoo
quote:
of course not, are you saying a plane that's on a treadwill WON'T move forward?
no i didn't.
i said if plane move it takes off.
if it doesn't move it doesn't take off.
i even kept it simple for you.
the jet moves reguardless if there is no physical resistance to the body of the plane.
the speed of the wheels and the conveyor belt would just have to gradually increase together until the plane takes off.
This post was edited on 12/6/07 at 1:11 pm
Posted on 12/6/07 at 1:11 pm to LSUBoo
right. but the plane would move, the wheels and conveyor belt would just destroy themselves. The plane would still take off.
Posted on 12/6/07 at 1:11 pm to Colonel Hapablap
don't you hollar at me.
i am really not interested enough in the topic at hand to search for the list.
i am really not interested enough in the topic at hand to search for the list.
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