Will the plane take off?? Finally going to be answered.***

[JimJ 5,000+ posts]

All I know is that Kari Byron is quite hot.

 

[Tiger Bass 5,000+ posts]

All I know is that Kari Byron is quite hot.

I will second this.

 

[mapolley07 10+ year member]

yeah, the lift of an airplane is all about the speed of air moving across the profile of the wing, if the plan remains stationary, no air would be generated. if this actually worked the military would probably be using it on aircraft carriers

 

[04_edge 10+ year member]

it wont take off. there will be no air flowing under the wings to generate lift.

so how is that even a myth, common sense should tell you the answer to that.

 

[Tiger Bass 5,000+ posts]

The military has actually been developing planes that take off and land vertically like the Harrier, but can achieve supersonic speeds and such. Had to watch a video on it for class.

 

[Relax 10+ year member]

The military has actually been developing planes that take off and land vertically like the Harrier, but can achieve supersonic speeds and such. Had to watch a video on it for class.

Does it involve a huge treadmill?

what a retarded myth to test. Thats like wanting to test the myth that if you hold an expression on your face for a long time it will freeze that way permanently.

 

[jmanpc 5,000+ posts]

The military has actually been developing planes that take off and land vertically like the Harrier, but can achieve supersonic speeds and such. Had to watch a video on it for class.

The F22?

 

[Acidburn 5,000+ posts]

Poll is up. cant believe I spelled experiment wrong. Hmm.

looks like you messed up the experiment

 

[Acidburn 5,000+ posts]

I will second this.

thirded

 

[Acidburn 5,000+ posts]

The F22?

hardly, the F22 has been in service for a few years already and it does not have V/STOL capability

he's referring to the JSF

 

[squeak9798 5,000+ posts]

Common sense, indeed.

Yes, the plane will take off. The wheels aren't drive wheels, they are free spinning. The wheels will spin twice as fast due to the "treadmill", but the plane will still advance forward and take off.

Put a hot wheels car on a running treadmill and see if you can push it forward with your hand.

 

[joetama 5,000+ posts]

Ok, now for the explanation for anyone who hasn't taken physics.

First of all as many people have said the wheels are not driven. Also, what makes a plane fly is the air moving over the wings, this is called LIFT.

Anyway, the friction force generated by the wheels spinning will be minimal, like the hot wheels example the wheels are free to spin (unless the brakes are applied). The friction force here will be MUCH less than the drive force (generated by the engine).

The plane will move forwards on the 'runway' (aka treadmill) just as nothing was different. The only real difference is the wheels will be spinning at 2x the normal take of speed. BUT, this doesn't matter because the wheels are just freely spinning. Assuming the wheels can spin fast enough the plane will take off. Anyone who thinks different needs to go take a physics class...

F=MA

If we have two forces we can say F1>F2 so we can also say A1>A2. Lets just throw some junk qualifiers in here. The Force of F1 = 10 kg*m/s^2; F2 = 1 kg*m/s^2, M = 1 kg.

SO A1= 10 m/s^2 A2 = -1 m/s^2 (Because it is exactly in the opposite direction)

If we add A1+A2=AF -> 10+(-1)=9 m/s^2

Unless the airplane is tied down or the wheels can not physically spin at 2x normal take off speed the airplane WILL take off.

I haven't posted here for a while, but I really get sick of reading this "no it won't" crap. So STFU, GTFO, GSYGD!

 

[jmanpc 5,000+ posts]

Common sense, indeed.
Yes, the plane will take off. The wheels aren't drive wheels, they are free spinning. The wheels will spin twice as fast due to the "treadmill", but the plane will still advance forward and take off.

Put a hot wheels car on a running treadmill and see if you can push it forward with your hand.

Well, I can see what you're saying. It's kind of hard to decipher with just that description.

If the plane is moving at takeoff speed, (as in, it is actually moving forward faster than the conveyor belt is moving backwards) then yes, it will take off.

But, if it is moving at the same speed forward as the conveyor belt is backwards, then no, it will not take off.

 

[squeak9798 5,000+ posts]

Well, I can see what you're saying. It's kind of hard to decipher with just that description.
If the plane is moving at takeoff speed, (as in, it is actually moving forward faster than the conveyor belt is moving backwards) then yes, it will take off.

But, if it is moving at the same speed forward as the conveyor belt is backwards, then no, it will not take off.

Again; The wheels aren't drive wheels, they are free spinning. The rate at which the wheels are spinning is not going to determine the speed of the plane; The thrust of the engine (less various frictions) is what determines the speed of the plane.

Think again about my comment regarding the hot wheels car and the treadmill. Your hand is providing the thrust to move the vehicle forward, not the wheels. You simply need to apply enough force to overcome the friction of the wheels (which will be small) and you'll easily be able to push the hot wheels forward.

Same concept applies to the airplane.

 

[mr Tibbs 10+ year member]

Again; The wheels aren't drive wheels, they are free spinning. The rate at which the wheels are spinning is not going to determine the speed of the plane; The thrust of the engine (less various frictions) is what determines the speed of the plane.
Think again about my comment regarding the hot wheels car and the treadmill. Your hand is providing the thrust to move the vehicle forward, not the wheels. You simply need to apply enough force to overcome the friction of the wheels and you'll easily be able to push the hot wheels forward.

Same concept applies to the airplane.

But if the plane and the treadmill are moving at the same speed in the opposite directions how does it create any lift to take off?//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif