Trick question

[sasqy]

Took to long to solve !
Plane ran out of fuel. No take off.

[planomustang]

Jet propulsion is going to push the fuselage forward regardless of what the wheels or belt does.

Correct, assuming there is minimal parasitic energy waste, in order to spin the wheels at twice the air speed of the jet. That is a reasonable assumption to make.

[Pstraw]

Jet propulsion is going to push the fuselage forward regardless of what the wheels or belt does.

Yes

[RWB]

An airboat is caught in a very strong current which just happens to equal the boat's top speed. When the boat is at top speed, it is thus stationary to an outside observer on the riverbank. Same with the 747.

Not the same comparison. Boat in a current is fighting the drag of the current. Plane on a treadmill would have almost no drag.

[bigdaddy590]

No. Just because the wheels would be moving does not mean the plane is moving. If the plane is stationary then there will be no wind over the wings. No wind over the wings = no lift. No lift= no fly


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[bigdaddy590]

Not the same comparison. Boat in a current is fighting the drag of the current. Plane on a treadmill would have almost no drag.

It is the same comparison. The friction of the water against the hill is the same principal as the friction on the tires.


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[bobc]

Have they brought the drink wagon down the isle yet?


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[jdavidson]

Go to an escalator

Have your output equal the escalator output

See how far you get

[Witchgrass]

Purple.

[Tom]

Go to an escalator

Have your output equal the escalator output

See how far you get

you think this is the same? The wheels of a plane are not the drive of the plane. the wheels are free to do as they wish. The thrust of the engines will move the plane without question.

think about it FFS.

The plane is being pushed through the air by the engines. the plane will go down the conveyor belt at the same speed as always. The wheels can do whatever they want. they will spin faster for sure but not have an impact on the motion of the plane.

[flywise]

[ame="https://m.youtube.com/watch?v=YORCk1BN7QY"]Mythbusters Plane on Conveyor Belt Ending - YouTube[/ame]

[MadHatter]

you think this is the same? The wheels of a plane are not the drive of the plane. the wheels are free to do as they wish. The thrust of the engines will move the plane without question.

think about it FFS.

The plane is being pushed through the air by the engines. the plane will go down the conveyor belt at the same speed as always. The wheels can do whatever they want. they will spin faster for sure but not have an impact on the motion of the plane.

Thrust only works because the wheels roll, moving the plane forward through the atmosphere, creating wind under the wings, causing lift.
Does it matter how much thrust a jet engine puts out, if the plane never moves forward?
If the conveyor constantly matches the plane wheels, how will the plane ever move forward?
It won't.
The harder the jet pushes, the faster the conveyor goes backwards, and the wheels never roll an inch forward, therefore the plane doesn't move an inch forward.
Thrust has to roll the plane forward through the atmosphere in order to create lift, so if the plane cannot roll forward on it's wheels, how are you creating this magical lift you speak of?
Can we set the plane on it's belly and still take off if we had a way to steer it?
At what amount of thrust, with a plane sitting still, can we just yank the landing gear out from underneath it, and expect it to take off?
Your forgetting gravity has not been overcome yet, and friction from it is still in play.
Now once the jet has taken off, that's a different story, different comparison, we have overcome gravity.
Can a jet that flys 500mph, move forward in a 500mph head wind?
That's apple to apples.
FFS

The myth busters setup is a joke, besides, props to jets is a different comparison all together.

[RMW]

Nope

[Old Bald Guy]

It’ll take off just like normal.

Exactly. The conveyor belt and wheels turning have little to no effect on the plane’s engines pushing the plane forward. Lift off will be relatively the same.
The conveyor/wheels part is just thrown in there to confuse you.
Actually a very simple question with a simple answer if you don’t get distracted by the gingerbread put in the question to confuse you.

[Old Bald Guy]

Thrust only works because the wheels roll, moving the plane forward through the atmosphere, creating wind under the wings, causing lift.
Does it matter how much thrust a jet engine puts out, if the plane never moves forward?
If the conveyor constantly matches the plane wheels, how will the plane ever move forward?
It won't.
The harder the jet pushes, the faster the conveyor goes backwards, and the wheels never roll an inch forward, therefore the plane doesn't move an inch forward.
Thrust has to roll the plane forward through the atmosphere in order to create lift, so if the plane cannot roll forward on it's wheels, how are you creating this magical lift you speak of?
Can we set the plane on it's belly and still take off if we had a way to steer it?
At what amount of thrust, with a plane sitting still, can we just yank the landing gear out from underneath it, and expect it to take off?
Your forgetting gravity has not been overcome yet, and friction from it is still in play.
Now once the jet has taken off, that's a different story, different comparison, we have overcome gravity.
Can a jet that flys 500mph, move forward in a 500mph head wind?
That's apple to apples.
FFS

The myth busters setup is a joke, besides, props to jets is a different comparison all together.

You have completely missed on this.
If you could leave the landing gear up and set the planes belly on the same conveyor belt it would take off like normal.
If the thrust of the engines is not going to move the plane why do you need a belt the length of the runway???
The wheels provide no propulsion so the conveyor belt would actually slightly reduce the amount of thrust needed for liftoff.
Removing the friction loss from the wheels is not the same as adding a 500 mph headwind.
Prop or jet propulsion is irreverent since both types of planes achieve lift off.