A question...

[BLLDOGG]

the plane is doing the exact same thing.


anyways guys...i have homework so enjoy the arguement.

[MTMike]

Another example.

You're on a skateboard, and someone is standing in the back of a pickup truck that is parked, pulling you forward towards them with a rope..... You move forward at the speed of the rope pull. Now, the truck starts to move foward while you're being pulled in. You're still being pulled closer to the truck at the same speed as before (meaning you're getting closer to the trcuk at the same speed) but the wheels on your skateboard are going faster than they were before.

[v6man]

sorry mike i got a headache i quit [img]smile.gif[/img]

[MTMike]

Originally posted by v6man:
sorry mike i got a headache i quit [img]smile.gif[/img]

The truth hurts, don't it? :D [img]graemlins/stickpoke.gif[/img]

[98Camaro3.8]

As the plane moves the treadmill moves but in the opposite direction. The treadmill has a system that tracks the speed of the plane and matches it exactly in the opposite direction.

The pilot gives the airplane full power and the propeller/jet pulls the airplane forward. Let's say he starts going 2 mph. The propeller/jet is pulling on the air that is now moving at 2 mph. At this point, the treadmill turns on and goes 2 mph in the opposite direction. As far as the wheels are concerned, the airplane is moving 4 mph with a stationary ground. The airplane is still moving forward at the exact same speed, because there is no force of drag to slow it down.

[teal99camaro]

no... the plane needs air rushing under its wings to create lift. The plane would be flying just as much as a plane parked on a runway next to it would. the only way the plane would fly is if a huge gust of wind created enough lift to lift the plane. theres reallyno argument

[teal99camaro]

think of a boat going 20mph. if the current is 20mph opposite, the boat will not move. an unmoving airplane does not have lift.

[v6man]

Originally posted by MTMike:
</font><blockquote>quote:</font><hr />Originally posted by v6man:
sorry mike i got a headache i quit [img]smile.gif[/img]

The truth hurts, don't it? :D [img]graemlins/stickpoke.gif[/img] </font>[/QUOTE]no not the truth

just not used to useing my brain. i am in the army i am not allowed to think just do. so thinking hurts [img]graemlins/rofl.gif[/img]

[MTMike]

Originally posted by teal99camaro:
no... the plane needs air rushing under its wings to create lift.

And the jet engines or prop create this "air rushing" effect under it's wings by creating thrust and PUSHING the plane forward through the air regardless of what the landing gear is doing Whether that landing gear is on asphalt, on a treadmill or tucked up inside of the plane.

[MTMike]

Originally posted by teal99camaro:
think of a boat going 20mph. if the current is 20mph opposite, the boat will not move. an unmoving airplane does not have lift.

THE BOAT USES THE WATER TO CREATE IT'S FORWARD THRUST.

If one of those everglades hoverboats with the big fan was on a river, it wouldn't give a rip what the current was doing.

[98Camaro3.8]

Disregard wings and lift totally. Focus on this question: will the airplane move?

Once the airplane starts moving, the treadmill moves in the opposite direction. The airplane continues to move because thrust is pulling it forward with no drag from the wheels. There is a net force forward which moves the airplane with absolutely no regard of the moving/stationary ground.

[3.4 slow to go]

the jet/prop wash will only hit certain parts of the wing, but not enough to create the lift required.the engines create enough force to overcome the friction between the wheels and the surface. Once the let/plane gets going, it's the full effect of the air moving over/under the surface area to generate lift. Once the plane gets going fast enough, then there will be lift to fly.

Originally posted by MTMike:
And the jet engines or prop create this "air rushing" effect under it's wings by creating thrust and PUSHING the plane forward through the air regardless of what the landing gear is doing Whether that landing gear is on asphalt, on a treadmill or tucked up inside of the plane.

so if the landing gear is up, and teh plane is sitting on the tarmac, it will still move even if th eengines are running?

[JusFlyinBy]

I agree with MTMike, I made the same arguments as him on another board, lol.

For the nay-sayers, think about this. The thrust of the engines are pushing against the stationary air around them. It doesn't matter if the FREE spinning wheels are moving at lightspeed in the opposite direction or not. The force is applied to the free standing air around the plane, so the plane will push forwards through the stationary air. Meanwhile the treadmill applies nothing but slight friction from wheel bearings against its free spinning wheels at the same but opposite speed of the plane.

Its like hanging a plane from a rope. Kick on the engines, will it move forward? You damn well bet.

[MTMike]

Originally posted by 3.4 slow to go:
so if the landing gear is up, and teh plane is sitting on the tarmac, it will still move even if th eengines are running?

I meant once it's in flight, but yeah. :D

[3.4 slow to go]

put that same plane on teh ground w/o landing gear & kick the engiens, what happens?