mariosabogal

Hey, so I asked Steve Pomroy... and he offered a fantastic explanation.

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Hey Mario.

If you recall, I talked previously about the importance of distinguishing between the *reason* the air travels faster over the top of the wing, and the *result* of the air traveling faster. Frank's misunderstanding is the result of people not making this distinction. He referenced the "equal transit time" principle, which is indeed garbage. But this is distinct from Bernoulli.REASON: The air travels faster over the top of the wing because of continuity (or circulation if you prefer).

RESULT: Once the increase in speed is a given, Bernoulli dictates a drop in pressure.

The effects of continuity (or circulation) can be both calculated and measured -- and indeed the calculations match the measurements. Ditto for Bernoulli.

Also, Bernoulli's equation can be formally derived from Newton's 2nd Law. It's not possible for one of them to be right while the other is wrong. I won't torture you with the details (calculus), but here's the general process:

1) Select a small element of fluid (air) travelling along a defined streamline.

2) Apply a force balance (Newton's 2nd Law, F=ma) to the fluid element.

3) Integrate (add up) the pressure and velocity changes along the streamline.

4) Result: Bernoulli's Equation (Ps + Pd = C).

For more details:

- http://www.flightwriter.com/2010/12/straw-man-of-equal-transit-time-lift.html

- http://www.flightwriter.com/2010/12/wherefore-art-thou-lift-lift-part-2.html

- http://www.flightwriter.com/2010/12/going-in-circles-lift-part-3.html

Cheers,

Steve Pomroy

President: SkyWriters Publishing

http://www.SkyWriters.aero

http://www.FlightWriter.com

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And for even more of of Steve's Knowledge goodness be sure to check out http://www.mariosflightschool.net/

Steve writes all the scripts for all the tutorial videos! :)

Happy Flying! Mario.

@farri sorry for the delayed response, i'll ask our Aerodynamic Engineer on staff and he will shed some light on this.

However, I highly recommend you watch both Bernoulli and Newton tutorial videos, as I understand they are both speaking to the same thing.

But i'll see what our expert says, stand by.

https://www.youtube.com/watch?v=yZ88xGrRDgI

https://www.youtube.com/watch?v=_hNDWXle3xs

Hey, just wanted to update everybody.

Our online flight school, “Mario’s Flight School” is making some good progress in developing more aviation tutorial videos. Please be sure to check out our stuff, linked below. If you like what you see please spread the word. If you don’t like what you see please message me ideas to make it better, if you have any.

Thanks! Mario.

Website : http://www.mariosflightschool.net/

Youtube Channel: http://goo.gl/MIiXSQ

https://www.youtube.com/watch?v=MA5VJdsIfxg