Backwash Causes Lift?

Matt Whiting writes:

Really? Many books still can't agree on the definition of current.
Some say it is the movement of electrons and some say it is the movement
of positive charge and some say it us both. Which is the absolute
truth, Mr. Wizard?

The absolute truth is unknown, and the real proof of wizardry is the ability
to say "I don't know."

Mxsmanic wrote in
:

Matt Whiting writes:

Really? Many books still can't agree on the definition of current.
Some say it is the movement of electrons and some say it is the
movement of positive charge and some say it us both. Which is the
absolute truth, Mr. Wizard?

The absolute truth is unknown, and the real proof of wizardry is the
ability to say "I don't know."




And the proof of your idiocy is that you can actualy say that with a
presumably straight face.

Matt, come on, you're better than that. You have to know what you're
talking about re current flow is simply accepting one convention or
another. In either case (using a plus or a minus sign consistantly
when writing loop equations for example) the calculations and
observations match fairly well.

The hand waving about lift is equally funny: people are attaching
names to various theories, but the reality is the physics used in the
analysis of lift work well enough to predict performance. The 'wise
fools' will wave their hands and argue, those knowing what they are
doing will design airplanes.

"Tina" wrote in message
ps.com...
Matt, come on, you're better than that. You have to know what you're
talking about re current flow is simply accepting one convention or
another. In either case (using a plus or a minus sign consistantly
when writing loop equations for example) the calculations and
observations match fairly well.

The hand waving about lift is equally funny: people are attaching
names to various theories, but the reality is the physics used in the
analysis of lift work well enough to predict performance. The 'wise
fools' will wave their hands and argue, those knowing what they are
doing will design airplanes.

BADA BING!

(I'm a southerner so spelling or usage may or may not be correct)

On Oct 6, 8:53 am, Tina wrote:
The hand waving about lift is equally funny: people are attaching
names to various theories, but the reality is the physics used in the
analysis of lift work well enough to predict performance. The 'wise
fools' will wave their hands and argue, those knowing what they are
doing will design airplanes.

This I definitely agree with. Even if aerodynamicists (is that even a
word) were so inept at physics that could not even calculate F=ma,
after so many iterations, they would still be able to make highly
refined airfoils simply because nature provides feedback to help one
distinguish between good designs and bad designs.

However, I must point out something I noted yesterday, that if you
have theory as well as the practice, the correct theory, there might
be opportunity to experience and entiely new realm of order and
efficiency.

I re-read the chapter on fluid mechanics in my physics book last night
and it says exactly what that NASA article refutes. Naturally, I was
bit perturbed - this physics book is same one used by some very good
universities. It also read in it a near verbatim explanation of
downwash as an example of Newton's law at work, that I found in the
Jeppesen book, the same explanation with is rigorously refuted by
NASA. I remember reading this chapter over and over a long time ago,
and "not getting it", and now I realize that it's because it is most
likely wrong.

In any case, there is something to be said for re-examining the
theory. There might be a bit of opportunity here.

I *think* I understand the physics behind reduced pressure above a
moving, appropriately shaped airfoil. *If* my suspicions are correct,
then it should be possible to make an entirely new type of aircraft,
where the mechanims to keep the aircraft flying are entirely different
from what they are today. I won't say too much now. I know no one
will consider it anyway. I'll just start fiddling, albeit slowly,
with my copy of SolidWorks that is coming in the mail soon.

I plan eventually to make a small-scale model. Hopefully, someday, I
might find someone involved in aerodynamics/flight to help make a
prototype.

-Le Chaud Lapin-

Le Chaud Lapin wrote in
oups.com:

On Oct 6, 8:53 am, Tina wrote:
The hand waving about lift is equally funny: people are attaching
names to various theories, but the reality is the physics used in the
analysis of lift work well enough to predict performance. The 'wise
fools' will wave their hands and argue, those knowing what they are
doing will design airplanes.

This I definitely agree with. Even if aerodynamicists (is that even a
word) were so inept at physics that could not even calculate F=ma,
after so many iterations, they would still be able to make highly
refined airfoils simply because nature provides feedback to help one
distinguish between good designs and bad designs.

However, I must point out something I noted yesterday, that if you
have theory as well as the practice, the correct theory, there might
be opportunity to experience and entiely new realm of order and
efficiency.

I re-read the chapter on fluid mechanics in my physics book last night
and it says exactly what that NASA article refutes. Naturally, I was
bit perturbed - this physics book is same one used by some very good
universities. It also read in it a near verbatim explanation of
downwash as an example of Newton's law at work, that I found in the
Jeppesen book, the same explanation with is rigorously refuted by
NASA. I remember reading this chapter over and over a long time ago,
and "not getting it", and now I realize that it's because it is most
likely wrong.

In any case, there is something to be said for re-examining the
theory. There might be a bit of opportunity here.

I *think* I understand the physics behind reduced pressure above a
moving, appropriately shaped airfoil. *If* my suspicions are correct,
then it should be possible to make an entirely new type of aircraft,
where the mechanims to keep the aircraft flying are entirely different
from what they are today. I won't say too much now. I know no one
will consider it anyway. I'll just start fiddling, albeit slowly,
with my copy of SolidWorks that is coming in the mail soon.

I plan eventually to make a small-scale model. Hopefully, someday, I
might find someone involved in aerodynamics/flight to help make a
prototype.

-Le Chaud Lapin-



You're an idiot


Bertie

Le Chaud Lapin wrote in
oups.com:

On Oct 6, 8:53 am, Tina wrote:
The hand waving about lift is equally funny: people are attaching
names to various theories, but the reality is the physics used in the
analysis of lift work well enough to predict performance. The 'wise
fools' will wave their hands and argue, those knowing what they are
doing will design airplanes.

This I definitely agree with.


No you don't



I plan eventually to make a small-scale model. Hopefully, someday, I
might find someone involved in aerodynamics/flight to help make a
prototype.


You couldn't make a succesful papaer dart.

Bertie

"Le Chaud Lapin" wrote in message
oups.com...
On Oct 6, 8:53 am, Tina wrote:
The hand waving about lift is equally funny: people are attaching
names to various theories, but the reality is the physics used in the
analysis of lift work well enough to predict performance. The 'wise
fools' will wave their hands and argue, those knowing what they are
doing will design airplanes.

This I definitely agree with. Even if aerodynamicists (is that even a
word) were so inept at physics that could not even calculate F=ma,
after so many iterations, they would still be able to make highly
refined airfoils simply because nature provides feedback to help one
distinguish between good designs and bad designs.

However, I must point out something I noted yesterday, that if you
have theory as well as the practice, the correct theory, there might
be opportunity to experience and entiely new realm of order and
efficiency.

I re-read the chapter on fluid mechanics in my physics book last night
and it says exactly what that NASA article refutes. Naturally, I was
bit perturbed - this physics book is same one used by some very good
universities. It also read in it a near verbatim explanation of
downwash as an example of Newton's law at work, that I found in the
Jeppesen book, the same explanation with is rigorously refuted by
NASA. I remember reading this chapter over and over a long time ago,
and "not getting it", and now I realize that it's because it is most
likely wrong.

In any case, there is something to be said for re-examining the
theory. There might be a bit of opportunity here.

I *think* I understand the physics behind reduced pressure above a
moving, appropriately shaped airfoil. *If* my suspicions are correct,
then it should be possible to make an entirely new type of aircraft,
where the mechanims to keep the aircraft flying are entirely different
from what they are today. I won't say too much now. I know no one
will consider it anyway. I'll just start fiddling, albeit slowly,
with my copy of SolidWorks that is coming in the mail soon.

I plan eventually to make a small-scale model. Hopefully, someday, I
might find someone involved in aerodynamics/flight to help make a
prototype.

-Le Chaud Lapin-


Dear Le DooD,

You have got some severe imagination going on here! You need to quit
playing with lift; that has already been invented. Anti-matter and
anti-gravity is where it is at. Use your force to leap into the next era of
travel. The wheel and wing are already here.

Beam me up Scotty,

--
*H. Allen Smith*
WACO - We are all here, because we are not all there.

Tina wrote:
Matt, come on, you're better than that. You have to know what you're
talking about re current flow is simply accepting one convention or
another. In either case (using a plus or a minus sign consistantly
when writing loop equations for example) the calculations and
observations match fairly well.

I was simply making a point that there are different ways of looking at
the same thing. Much the same with lift and Bernoulli and Newton. Does
the difference in pressure between the top and bottom of the airfoil
cause the downward airflow behind the airfoil, or does the mechanical
deflection of the airflow cause the different in pressure between the
top and bottom of the wing? Inquiring minds want to know? :-)

Matt

Tina wrote in news:1191678837.514394.4670
@r29g2000hsg.googlegroups.com:

Matt, come on, you're better than that. You have to know what you're
talking about re current flow is simply accepting one convention or
another. In either case (using a plus or a minus sign consistantly
when writing loop equations for example) the calculations and
observations match fairly well.

The hand waving about lift is equally funny: people are attaching
names to various theories, but the reality is the physics used in the
analysis of lift work well enough to predict performance. The 'wise
fools' will wave their hands and argue, those knowing what they are
doing will design airplanes.



Yep

Bertie