Runways not needed for take off.

Leros

Lifer
Jul 11, 2004
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LLIorRa.png


Discuss
 

_Rick_

Diamond Member
Apr 20, 2012
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It's more likely to work if you use the free energy windmill to build a vortex free 200 mph headwind. You can maybe use a free energy tread mill to power a huge propeller. Flip that arrow in the diagram, and it will work.

Reference: 80 knot crosswind landing in lock-on youtube video.
 

zanejohnson

Diamond Member
Nov 29, 2002
7,054
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It's more likely to work if you use the free energy windmill to build a vortex free 200 mph headwind. You can maybe use a free energy tread mill to power a huge propeller. Flip that arrow in the diagram, and it will work.

Reference: 80 knot crosswind landing in lock-on youtube video.

this is divine intelligence.
 

disappoint

Lifer
Dec 7, 2009
10,137
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It's more likely to work if you use the free energy windmill to build a vortex free 200 mph headwind. You can maybe use a free energy tread mill to power a huge propeller. Flip that arrow in the diagram, and it will work.

Reference: 80 knot crosswind landing in lock-on youtube video.

You'll crash into the windmill. If you leave the windmill's wake the plane will stall and fall.
 

_Rick_

Diamond Member
Apr 20, 2012
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You'll crash into the windmill. If you leave the windmill's wake the plane will stall and fall.

I'm assuming that the stream of air dissipates slowly towards all sides in strength. Power up the engines, dodge the windmill, and don't crash.
One of the bigger issues with turbines is, that they don't work well at low speeds. The windmill helps overcome this, and then you only need enough thrust to get out. If the flow is thick enough, you can even angle up the plane in the airflow, and bounce up a bit, then dive down to gain speed, and voilà, you're airborne and flying.

Also, in the OP only take off was required, not actually leaving the area :D


edit: my reference is this: http://www.youtube.com/watch?v=3J6-Ee4AJH0
 
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Agent11

Diamond Member
Jan 22, 2006
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Mythbusters have already proven a plane can take off from a treadmill. Whether it would be cost effective though I find doubtfull. Maybe for aircraft carriers.
 

Murloc

Diamond Member
Jun 24, 2008
5,382
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Perpetual motion machines work because it infuriates engineers and the steam coming out of their ears can be used to spin turbines.
lol yeah, I once saw on an electronics forum a huge sticky about how you don't have to post about free energy machines or something.
Apparently lots of people fall for that shit and spam forums all over. Or maybe they're just serial trolls who have a gripe with them.
 

DrPizza

Administrator Elite Member Goat Whisperer
Mar 5, 2001
49,606
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The image in the OP is not what happens when a plane takes off on a treadmill. The treadmill IS a runway. Regardless of how fast the treadmill is spinning backwards, the plane will move forward. Forward speed is dependent on the propellers (or jet engines) and, largely (ignoring frictional effects) independent of the wheels.
 

Doppel

Lifer
Feb 5, 2011
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In WWII Japan was experimenting with a treadmill-type aircraft carrier. It was shorter than others and it worked very well for planes taking off, but in practice it was found that landing was very difficult, because the runway (the treadmill) was so short that unless they hit it dead on, they'd just go off the end of the ship.
 

Newbian

Lifer
Aug 24, 2008
24,778
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In WWII Japan was experimenting with a treadmill-type aircraft carrier. It was shorter than others and it worked very well for planes taking off, but in practice it was found that landing was very difficult, because the runway (the treadmill) was so short that unless they hit it dead on, they'd just go off the end of the ship.

Toss it in reverse or have the planes land from the same side they took off. :biggrin:
 

edro

Lifer
Apr 5, 2002
24,328
68
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The treadmill is only as long as the A380.
It will drive off the end of the treadmill, hit the ground, asplode and diaf.
 

Doppel

Lifer
Feb 5, 2011
13,306
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Toss it in reverse or have the planes land from the same side they took off. :biggrin:
By the end of the war the Japanese found that if there were four treadmills pointing to one another in an X-type fashion, any plane that flew over their intersecting point was stopped in the air and would hang there, at which point the pilot could then gently descend and land.
 

edro

Lifer
Apr 5, 2002
24,328
68
91
By the end of the war the Japanese found that if there were four treadmills pointing to one another in an X-type fashion, any plane that flew over their intersecting point was stopped in the air and would hang there, at which point the pilot could then gently descend and land.
I love hearing about these end of war engineering feats!
This one sounds awesome, but I question it's effectiveness.
 

LookBehindYou

Platinum Member
Dec 23, 2010
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Well shit, this thread gave me a headache and it's only 7:38. That's what I get for trying to think this early.
 

dawp

Lifer
Jul 2, 2005
11,345
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OP seems to not know that it isn't the wheels that drive the plane forward on the ground but the engines. it would still moved forward even it the treadmill could go 200 mph.

besides didn't mythbusters already take care of this?