Will the plane fly?
Postmaster
Joined: Feb 2003
Posts: 4,074
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From: Las Vegas
Originally Posted by Aztrainer
A way for people to see this is get on a treadmill and run or walk at a specific speed and then take a bigger step or stride. You will move closer to the front of the treadmill.
I'm glad you got it............but it's not because of the above reason.
Fleet Mechanic
Joined: Aug 2005
Posts: 1,689
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Originally Posted by DOHCmarauder
Why? The plane will fly, no ands, ifs or buts.
BTW, that thar sentence in my original post was grammatically correct.
Thanks for playing!
Posting Guru
Joined: Sep 2003
Posts: 2,231
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From: Valley of the Sun AZ
Originally Posted by Chugalug
Sorry - I'd rather prove this to you in the open
From post #25:
Think of the forces involved. The engines are at full throttle, so they will apply force to the plane in the forward direction. In order for the plane not to fly, there would have to be an equal force in the opposite direction. Where does this force come from? (Don't tell me it comes from the conveyer belt.)
That is exactly where it comes from. But "I" can't tell you that.
The belt is turning the wheels in the reverse direction keeping the plane from gaining any foreward speed. The belt matches the speed of the wheels.
I typed this real slow so you might understand it.
__________________
From post #25:
Think of the forces involved. The engines are at full throttle, so they will apply force to the plane in the forward direction. In order for the plane not to fly, there would have to be an equal force in the opposite direction. Where does this force come from? (Don't tell me it comes from the conveyer belt.)
That is exactly where it comes from. But "I" can't tell you that.
The belt is turning the wheels in the reverse direction keeping the plane from gaining any foreward speed. The belt matches the speed of the wheels.
I typed this real slow so you might understand it.
__________________
If the belt is stagnant and has no force on it; when the plane starts its T/O roll, the belt will never match the speed of the plane as the plane is accelerating faster than the belt can accelerate due to the thrust of the engines. The belt is always trying to catch-up
If you think of a boat on the water it is like the same thing. The water is a viscous media that is always moving. Once power has been applied to the prop the boat will move forward, even though the water is still viscous. It is all relative to the speed of the boat.
I would like to see the sniping at people’s intelligence to stop. IMHO
Last edited by Aztrainer; Jan 4, 2007 at 04:39 PM.
Postmaster
Joined: Feb 2003
Posts: 4,074
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From: Las Vegas
Originally Posted by Greywolf
(I have not read the rest of the answers, and don't remember if I saw this before)
Since aircraft wheels are free-running, and the engines act against the surrounding air, the airplane will gather speed against the air around it and fly.
ASSUMING THE FOLLOWING DOES NOT TAKE PLACE:
The conveyor will attempt to continue to compensate for the aircrafts forward movement, will eventually be unable to, and the chances are pretty good that the conveyor, the aircraft tires, or BOTH will be destroyed.
Since aircraft wheels are free-running, and the engines act against the surrounding air, the airplane will gather speed against the air around it and fly.
ASSUMING THE FOLLOWING DOES NOT TAKE PLACE:
The conveyor will attempt to continue to compensate for the aircrafts forward movement, will eventually be unable to, and the chances are pretty good that the conveyor, the aircraft tires, or BOTH will be destroyed.
Sigh............another correct answer but for the wrong reasons.
Try the toy car on the treadmill trick.............doesn't matter how fast the treadmill goes, you will be able to push the car forward.
Fleet Owner
Joined: Aug 2001
Posts: 29,941
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From: Drummonds, TN USA
Cupie dolls will be awarded for all correct or incorrect answers. Please forward twenty dollars shipping and handling with a self addressed postage paid FEDEX box to the "Greywolf Fund for Making Greywolf Fat and Happy"...
Fleet Mechanic
Joined: Aug 2005
Posts: 1,689
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After seeing about 4 different versions of this same thing, i still fail to see what the hell the conveyor belt has to do with this problem.
If the plane is ACTUALLY moving, like with wind speed, or jets or whatever, it will fly.
If its just a conveyor belt, then it wont fly. Ive seen this version as well, and don't see how its even a version.
If the plane is ACTUALLY moving, like with wind speed, or jets or whatever, it will fly.
If its just a conveyor belt, then it wont fly. Ive seen this version as well, and don't see how its even a version.
Postmaster
Joined: Feb 2003
Posts: 4,074
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From: Las Vegas
Originally Posted by ag-ford-4x4
Sounds like maybe you SHOULD go to A&M to study physics (and common sense).
BTW, that thar sentence in my original post was grammatically correct.
Thanks for playing!
BTW, that thar sentence in my original post was grammatically correct.
Thanks for playing!
Why would I go to a school to learn wrong answers???
Sentence may have been grammatically correct.........just reads silly.
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From: northwest,sc
Try the toy car on the treadmill trick.............doesn't matter how fast the treadmill goes, you will be able to push the car forward.
Different scenero altogeather. You are the outside force in this.
Put a propeller on the car and see if it will fly.
Different scenero altogeather. You are the outside force in this.
Put a propeller on the car and see if it will fly.
Postmaster
Joined: Feb 2003
Posts: 4,074
Likes: 1
From: Las Vegas
Originally Posted by ag-ford-4x4
After seeing about 4 different versions of this same thing, i still fail to see what the hell the conveyor belt has to do with this problem.
If the plane is ACTUALLY moving, like with wind speed, or jets or whatever, it will fly.
If its just a conveyor belt, then it wont fly. Ive seen this version as well, and don't see how its even a version.
If the plane is ACTUALLY moving, like with wind speed, or jets or whatever, it will fly.
If its just a conveyor belt, then it wont fly. Ive seen this version as well, and don't see how its even a version.
The belt is to throw off people (as it did me) that somehow it'll cause the plane to just spin its wheels and go nowhere.
But since the wheels do not actually move the plane (think of your hand pushing the car on a treadmill) the belt is moot.....
Postmaster
Joined: Feb 2003
Posts: 4,074
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From: Las Vegas
Originally Posted by Chugalug
Try the toy car on the treadmill trick.............doesn't matter how fast the treadmill goes, you will be able to push the car forward.
Different scenero altogeather. You are the outside force in this.
Put a propeller on the car and see if it will fly.
Different scenero altogeather. You are the outside force in this.
Put a propeller on the car and see if it will fly.
See now you're just closing your mind...........your hand IS the prop/jet.
The plane will move forward because the propulsion is not coming from the wheels............I think you may be the last one not to get it....but I have confidence you'll grasp it in the next couple pages...
Posting Guru
Joined: Dec 2002
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From: Racine county, WI
Originally Posted by ag-ford-4x4
Sounds like maybe you SHOULD go to A&M to study physics (and common sense).
Not everyone can wrap their heads around this but when you realize the conveyor has nothing to do with slowing the plane down you might want to retract the statement above.
Originally Posted by Chugalug
Try the toy car on the treadmill trick.............doesn't matter how fast the treadmill goes, you will be able to push the car forward.