finally the proof I need

It can't take off I only clicked once I swear

copperman Said: Now will a helicopter is on a turntable rotating opposite of the blades at matching speeds be able to take off? :woohoo:

Sure will! :) But will the pilot be too dizzy to keep it in the air? :woohoo:

Now will a helicopter is on a turntable rotating opposite of the blades at matching speeds be able to take off? :woohoo:

Copper it was not ment the way you think i know itts a joke. I know just how far and how heated it got last time. I proved the theory to prevent the arguements and other related bs.

I like the joke its a great one but i remember just how much trouble it made last time around.

Dang. And here I was, googling every airport within sight of moutains, to see where that runway was located.

:dry: :blush:

You didn't need to prove anything IT WAS A JOKE :woohoo: :laugh: :) ;)

I still think this is funny but i had to prove the real truth behind this. sorry copper but those are the facts.

Not trying to be a kill joy since i have seen this i dont know how many times. But nothing will withstand the power needed and materials strong enough to 1 hold the plance and have that much thrust. P=F and D over T Power P Force F Distance D Thrust T

WIth the math therory in use your answer is 87,325 hp ( 65,100 kW) to stop a 747 from taking off. and the rotating tread mill would be around 458,630,900 rpm. in quadric equation. Thats if my math is correct and i did it twice so im thinking the number is correct.

There is not a man made or non man made materail that could withstand a second of that speed let alone a planes weight i never even added to the equation. im just basing this off the motors power. Add the weight and that number goes farther than my calculator goes. Hence BS.

Oh forgot 1 thing. this is related to roofing. This is also how ridge vent works. Just for FYI

Currently each engine on a Boeing 747-400 can generate a maximum of about 63,300 lbs of thrust. Accordingly, since this aircraft has four engines it can produce total thrust of about 253,000 lbs.

There is only 1 way this could happen and the word is could using about 85000 lbs of thrust but what would make the tredmill material not breakaprt but yet stay flexable enough to move that fast with that much weight. so i say. Impossible never going to happen i had a long version but it gave me an error so with that:

In most flows of liquids, and of gases at low Mach number, the mass density of a fluid parcel can be considered to be constant, regardless of pressure variations in the flow. For this reason the fluid in such flows can be considered to be incompressible and these flows can be described as incompressible flow. Bernoulli performed his experiments on liquids and his equation in its original form is valid only for incompressible flow. A common form of Bernoulli's equation, valid at any arbitrary point along a streamline where gravity is constant, is:

where:

is the fluid flow speed at a point on a streamline, is the acceleration due to gravity, is the elevation of the point above a reference plane, with the positive z-direction pointing upward — so in the direction opposite to the gravitational acceleration, is the pressure at the point, and is the density of the fluid at all points in the fluid. If gravity is constant, then Bernouli's equation can be generalized as:

where:

Ψ is the gravitational potential at the point. The following assumptions must be met for these equations to apply:

The fluid must be incompressible - even though pressure varies, the density must remain constant. The streamline must not enter a boundary layer. (Bernoulli's equation is not applicable where there are viscous forces, such as in a boundary layer.) By multiplying with the mass density ρ, the above equation can be rewritten as:

or:

where:

is dynamic pressure, is the piezometric head or hydraulic head (the sum of the elevation z and the pressure head)[5][6] and is the total pressure (the sum of the static pressure p and dynamic pressure q).[7] The constant in the Bernoulli equation can be normalised. A common approach is in terms of total head or energy head H:

The above equations suggest there is a flow speed at which pressure is zero, and at even higher speeds the pressure is negative. Most often, gases and liquids are not capable of negative absolute pressure, or even zero pressure, so clearly Bernoulli's equation ceases to be valid before zero pressure is reached. In liquids -- when the pressure becomes too low -- cavitation occurs. The above equations use a linear relationship between flow speed squared and pressure. At higher flow speeds in gases, or for sound waves in liquid, the changes in mass density become significant so that the assumption of constant density is invalid.

That is funny!

The length and speed of the stripes on the moving displaced threshold/hold short lines indicated the conveyor is only running about 85 kts, which is far below the rotation/takeoff speed of that aircraft...which, as I maintaned all along, would not matter because relative (wind) speed over the wings is all that matters.

Not this again!