think about this...

[Patrick del Poker Grande]

[ QUOTE ]
If you are saying that the runway moves backward at the speed the wheels’ center of mass translates forward, the plane is not moving forward with respect to the air, and will never take off.

If the runway moves backward at the tangential speed at which the edge of the wheels move, then the plane can achieve forward movement with respect to the air, and presumably take off.

The plane moves a distance d equal to the circumference of its wheels in time t. The time t is the period of rotation of the plane’s wheels, which is equal to 1/w, the angular speed of the wheels’ rotation.

Vplane=(2*pi*rwheel)*w

Omega is equal to the speed of the edge of the wheel divided by their radius by geometry.

Vedge=rwheel*w

Thus, Vplane=2*pi*Vedge.

So the plane speed with respect to the air = Vplane-Vrunway = Vplane-Vplane/(2*pi) = Vplane*(1-1/(2*pi)). (Vplane is the speed of the plane with respect to the runway...)

[/ QUOTE ]
I hope you had fun doing all this crap.

[Patrick del Poker Grande]

[ QUOTE ]
[ QUOTE ]
Alright, kids. I'm going to let you in on a little rocket science secret. Prop planes do not generate lift by blowing air over the wings.

[/ QUOTE ]

way to take half the fun out of this thread!

[/ QUOTE ]
Nah, I just shifted the fun. MS Paint is fun!

[4_2_it]

Is this a pre-lude to a Coanda vs. Bernouilli effect argument? I am not a scientist, but will amke an attempt to answer your question, the Coanda effect causes the air that moves over the wing is deflected downward and creates lift. I don't see how a conveyor belt can prevent this from occurring.

[Patrick del Poker Grande]

[ QUOTE ]
Is this a pre-lude to a Coanda vs. Bernouilli effect argument? I am not a scientist, but will amke an attempt to answer your question, the Coanda effect causes the air that moves over the wing is deflected downward and creates lift. I don't see how a conveyor belt can prevent this from occurring.

[/ QUOTE ]
No. Go hit MS Paint like everyone else is right now.

[BoogerFace]

[Eurotrash]

Ok, so far I have this, Patrick. note that you are riding on top of the plane.


edit: i suppose I shouldnt have included the tangential velocity of the wheel, i don't really know. but i threw it in there for some reason anyway. deal with it.

[Patrick del Poker Grande]

[ QUOTE ]
Ok, so far I have this, Patrick. note that you are riding on top of the plane.




[/ QUOTE ]
Very nice. That's a good start.

[IndieMatty]

im crying. this is awesome.

[Eurotrash]

[ QUOTE ]
im crying. this is awesome.

[/ QUOTE ]


this is just the beginning my friend. it gets better!

[razor]

[ QUOTE ]
Prop planes do not generate lift by blowing air over the wings.

[/ QUOTE ]

[img]/images/graemlins/shocked.gif[/img]