Imagine a plane is sitting on a treadmill, Mythbusters test it!

[TurdFergeson]

See, e.g., post 64.

If a rocket had enough thrust, it would NOT need to be sitting on the ground to take off.

So your question can be answered either way, because it was worded in a dumb manner.

 

[Sean]

He actually has a point. Like a boat, water actively moves a sea plane. River plane captain always like to get the water at their backs if they can. At least, that's what I've heard.

And an aircraft carrier will always turn into the wind when launching: higher airspeed over the wings.

 

[TurdFergeson]

He actually has a point. Like a boat, water actively moves a sea plane. River plane captain always like to get the water at their backs if they can. At least, that's what I've heard.

Dude..it's above him. He thinks a rocket needs to be on the ground to take off.

lol

 

[tactful]

That's *precisely* how they move around on the ground.

And it's why they need to be "pushed back" from the gate with a tractor.

Aircraft wheels are not "powered" in any way.

Nor do seaplanes have little propellers on the back of the pontoons, or paddle-wheels, or water jets.

The aircraft achieves airspeed by virtue of the THRUST created by its propeller or turbine. It moves through the air by pushing against the mass of air behind the aircraft -- regardless of whether whatever is beneath it (water, earth) is stationary or moving.

Someone has been attentive in science class, the others were napping.

 

[CTYankee]

Pulling the tarp with the truck just ADDS the tarp speed to the indicated ground speed at the wheels.

Doesn't change either the actual speed-over-ground or the airspeed.

 

[Paendragon]

And an aircraft carrier will always turn into the wind when launching: higher airspeed over the wings.

Exactly.

 

[MechaBlade]

Yep.

Now do you get it?

Hey, I've always allowed for the possibility of takeoff if the wheels were dragged across the ground, similar to the no-wheels-at-all idea.

Here's a pic of a small plane. Look at the undercarriage, there's nothing driving the wheels.

http://www.flightsim.com/feature/porterer.jpg

In the riddle it was a jet.

That's *precisely* how they move around on the ground.

And it's why they need to be "pushed back" from the gate with a tractor.

Aircraft wheels are not "powered" in any way.

Nor do seaplanes have little propellers on the back of the pontoons, or paddle-wheels, or water jets.

The aircraft achieves airspeed by virtue of the THRUST created by its propeller or turbine. It moves through the air by pushing against the mass of air behind the aircraft -- regardless of whether whatever is beneath it (water, earth) is stationary or moving.

I've never heard this and am inclined not to believe you.

 

[Legenda]

If a rocket had enough thrust, it would NOT need to be sitting on the ground to take off.

So your question can be answered either way, because it was worded in a dumb manner.

The question was sarcastic.

It must be exceedingly difficult for one airplane to shoot down another airplane using missiles - what with no earth around for the missile's thrust to push against.

It's the same thing with the airplane on the treadmill. The thrust of the propeller or jet engine could care less about if the wheels are turning. The thrust pushes against the atmosphere, not the earth.

 

[TurdFergeson]

The question was sarcastic.

It must be exceedingly difficult for one airplane to shoot down another airplane using missiles - what with no earth around for the missile's thrust to push against.

It's the same thing with the airplane on the treadmill. The thrust of the propeller or jet engine could care less about if the wheels are turning. The thrust pushes against the atmosphere, not the earth.

And a seaplane will still have to use more power to take off than a plane on a treadmill.

 

[thesorrow07]

I'm not talking about the ground. I don't care about the ground. Fuck the ground with a big rubber dick.

If the air speed over the wings is not sufficient to generate lift the aircraft will not take flight, period.

This was funny.

 

[Sean]

Hey, I've always allowed for the possibility of takeoff if the wheels were dragged across the ground, similar to the no-wheels-at-all idea.


In the riddle it was a jet.


I've never heard this and am inclined not to believe you.

http://content.answers.com/main/content/img/McGrawHill/Encyclopedia/images/CE369900FG0010.gif

 

[MechaBlade]

http://content.answers.com/main/content/img/McGrawHill/Encyclopedia/images/CE369900FG0010.gif

None of those things turn the wheels?

A plane can't go backwards by itself?

 

[TurdFergeson]

A plane can't go backwards by itself?

Yeah, they reverse the engines.

 

[Sean]

None of those things turn the wheels?

A plane can't go backwards by itself?

None of those things turn the wheels.

Some jets can be put into reverse thrust, but usually they use a tractor.

 

[Paendragon]

Dude..it's above him. He thinks a rocket needs to be on the ground to take off.

lol

Well, you do see to rub a lot of people the wrong way. I'm sure he could see the seaplane thing, but disliking you seems to take precedence in his mind.

What the hell did you do to him?

 

[MechaBlade]

None of those things turn the wheels.

Some jets can be put into reverse thrust, but usually they use a tractor.

Well, fuck.

 

[TurdFergeson]

Well, you do see to rub a lot of people the wrong way. I'm sure he could see the seaplane thing, but disliking you seems to take precedence in his mind.

What the hell did you do to him?

Nothing that I know of.

He's just a rotten old crab.

 

[CTYankee]

Well, fuck.

Reversing the engines is fine for slowing a landing jumbo jet.

But it does a number on the glass windows of the terminal building.

The wheels aren't powered, and the aircraft are typically pushed back with one of these:

http://www.victorygse.com/equipment1/pushback/images/MC20_000.JPG

 

[Wok]

http://albn.org/lift.png

and

http://albn.org/Bernoulli.png

 

[Paendragon]

http://albn.org/lift.png

and

http://albn.org/Bernoulli.png

A+E=ninja. It's true.

 

[Wok]

A+E=ninja. It's true.

One is the Lift Equation and the other is Bernoulli's principle.

 

[Paendragon]

One is the Lift Equation and the other is Bernoulli's principle.

Mine is made-up BS.



To say I have a unique sense of humor, is understatement in its truest form.

 

[Wok]

Mine is made-up BS.

Well, the point is, there is no indication about the surface of the ground in the equations. It is simply to clear the air a bit.

 

[Paendragon]

Well, the point is, there is no indication about the surface of the ground in the equations. It is simply to clear the air a bit.

I had edited my post. It's me being a smartass. Physics is not my area of expertise. lol.

 

[Wok]

I had edited my post. It's me being a smartass. Physics is not my area of expertise. lol.

Oh I know you were being silly, and that is no problem for me. When one looks at the equations, it becomes clearer.

http://www.centennialofflight.gov/essay/Theories_of_Flight/Ideal_Fluid_Flow/TH7.htm