Grumman Rules the Sky

[BaldEagl]

Ohhh... I thought I was on ignore.  Too bad.

You stilll haven't answered the question.

Here it is again:

Here is the original question for you


   
plane on a conveyor belt?
« on: January 19, 2007, 09:30:28 PM »
A plane is standing on a runway that can move like a giant conveyor belt. The plane applies full forward power and attempts to take off. This conveyor has a control system that tracks the plane's wheel speed and tunes the speed of the conveyor to be exactly the same but in the opposite direction, similar to a treadmill.

The question is:

Will the plane take off or not?

[Puma44]

Ohhh... I thought I was on ignore.  Too bad.

You stilll haven't answered the question.

Here it is again:

BaldEagl, pretty typical of someone without facts or logic, so he reverts to name calling in a feeble attempt to make his case.

[Lusche]

Have you guys ever heard of the phrase "don't feed the troll"?

 

[Widewing]

Skuzzy has been very generous in this thread... Must be the holiday spirit....

[GScholz]

IIRC Skuzzy said he won't do anything unless it is reported.

[B3YT]

Old man I got it . You could be doing 300Kts IAS but only doing 270 kts ground speed in   a 30 kt winds The aircraft won't stall out as it has the wind is acting as if it's moving forwards on the ground . adversely if the wind is coming from behind and your doing 300Kts ISA and the wind is blowing at 30kts then your having to go 330kts relative to the ground .  This would have zero effect to rate of climb as the wing still produces the same amount of lift no matter as it still thinks it's going the the air at that  300kts  with a ground tail wind .

[Ack-Ack]

IIRC Skuzzy said he won't do anything unless it is reported.

I have a feeling when a particular person's argument is shown to be nothing more than thin air and straw men, he hits the report button.

ack-ack

[B3YT]

Ohhh... I thought I was on ignore.  Too bad.

You stilll haven't answered the question.

Here it is again:

I vote for no as air is not passing over the wings . Would that be right?

[Golfer]

I vote for no as air is not passing over the wings . Would that be right?

Airplanes aren't cars.

[B3YT]

read up , got it .   Aircraft not driven by wheels so doesn't take off due to ground speed but IAS . doesn't matter how fast the conveyor moves as the wheels are free spinning .

[pembquist]

Since this topic is wandering anyway I think it's time to bust out the old down wind turn stall for J.A.W.  Flying against a fifty knot headwind in level flight with a ground speed of 30 knots in a plane with a stall speed of 50 knots are you more likely to stall if you turn downwind than you would making the same turn but with only a 2 knot headwind and a ground speed of 78 knots?

Further, why could it be said that knowledge of the correct answer could in fact lead to a more dangerous decision than believing in the incorrect answer?

[colmbo]

This would have zero effect to rate of climb as the wing still produces the same amount of lift no matter as it still thinks it's going the the air at that  300kts  with a ground tail wind .

Airplanes do not climb because they have excess lift.  They climb because they have excess power.  Lift has squat to do with a steady state climb.

[B3YT]

Thats what I was pointing out .  it wouldn't matter what the wind was doing , as long as the air is passing over the wing so it's not  stalling .

[mtnman]

Again thanks for the thoughtful & well considered post Mtn-m,

One to add to the 'this what I  - seen - heard - done - know'.. file..

Who'da thunk it?  You can throw a glider off the hill on a windy day and get it to go over 450mph! 

An example...  If you watch past the first few minutes, he flies slower (405mph) with a better camera set-up so you can actually see the plane, lol.

http://www.youtube.com/watch?v=rfoxjNg-eg0

And a fairly simple video explanation of how it works.-

http://www.youtube.com/watch?v=SVN-oF6tPLc

[RotBaron]

Isn't it or is it, hmmm, anyhow, the physic that needs to be understood is, what causes a plane to move forward; power, aye? Power (thrust) drives the ability to create lift, aye?

Thus the plane takes off.

Or did I miss something? I'm only one cartooooon pilot (said in my best Ron White 'one man' voice.)