"AC" wrote in message ...
The answer to your question, is yes. Sails are made from dacron for ease of
handling & shortening, and cost. Many examples of rigid-wing vessels exist,
I suggest doing a search on that. They often use fairings at the leading
edge, or movable trailing edges to fine tune the foil.

An aircraft can fly inverted, because its angle-of-attack changes to suit
the correspondingly lower efficiency of the foil in this position. As others
have noted, acrobatic craft often employ nearly symmetrical foils for this
reason. A normally profiled foil will fly inverted, but inefficiently, and
at a much lower VMG due to the increased drag from the higher angle of
attack.

The profile of the wing only handles the Drag, not Lift.

Angle of attack handles Lift (see the Cl/Alfa diagram)!

Try some "Bernoulli experiments for kids",and you will reach a better
understanding.


Bernoulli experiments are all due to other physical effects like
boundary layer (asymmetric) separation, entrainment of air, Coanda
effect etc.

The thought that " a change in air velocity will change the pressure"
is not real, only mathematic relations.


Jan-Olov Newborg

The profile of the wing only handles the Drag, not Lift.

ah, no.

Try some "Bernoulli experiments for kids",and you will reach a better
understanding.

no, you won't. wings/sails do not have lift because of "Bernoulli" inspite of
the fact you can read such in thousands of kiddie books.

Jax,

How much have you studied the response of sails?

By studied, I mean with real data from instruments calibrated to
accepted standards and in standardized conditons.

If not Bernoulli, Then perhaps you will explain to the readers how the
Kutta-Zhukovsky Theorem can explain everything without assistance of the
equations set out by Daniel Beroulli. Or, did you have something else
in mind?

Matt Colie (CV by request only)

JAXAshby wrote:
Try some "Bernoulli experiments for kids",and you will reach a better
understanding.


no, you won't. wings/sails do not have lift because of "Bernoulli" inspite of
the fact you can read such in thousands of kiddie books.

yes.

From: Matt Colie
Date: 8/28/2004 4:30 PM Eastern Daylight Time
Message-id:

Jax,

How much have you studied the response of sails?

By studied, I mean with real data from instruments calibrated to
accepted standards and in standardized conditons.

If not Bernoulli, Then perhaps you will explain to the readers how the
Kutta-Zhukovsky Theorem can explain everything without assistance of the
equations set out by Daniel Beroulli. Or, did you have something else
in mind?

Matt Colie (CV by request only)

JAXAshby wrote:
Try some "Bernoulli experiments for kids",and you will reach a better
understanding.


no, you won't. wings/sails do not have lift because of "Bernoulli" inspite
of
the fact you can read such in thousands of kiddie books.

Jax,

This is so much like when I was a GA.
"Yes" is not a complete answer.

So...I Repeat
If not Bernoulli, Then perhaps you will explain to the readers how the
Kutta-Zhukovsky Theorem can explain everything without assistance of the
equations set out by Daniel Beroulli.

Or, did you have something else in mind?

Please elaborate, we are waiting Oh so patiently.
There are two DC's here wait to hear.

Matt Colie - See Prior Sig



JAXAshby wrote:
yes.


From: Matt Colie
Date: 8/28/2004 4:30 PM Eastern Daylight Time
Message-id:

Jax,

How much have you studied the response of sails?

By studied, I mean with real data from instruments calibrated to
accepted standards and in standardized conditons.

If not Bernoulli, Then perhaps you will explain to the readers how the
Kutta-Zhukovsky Theorem can explain everything without assistance of the
equations set out by Daniel Beroulli. Or, did you have something else
in mind?

Matt Colie (CV by request only)

JAXAshby wrote:

Try some "Bernoulli experiments for kids",and you will reach a better
understanding.


no, you won't. wings/sails do not have lift because of "Bernoulli" inspite

of

the fact you can read such in thousands of kiddie books.

matt, give it up. beernoulli is not part of any theory of flight. none.
except in kiddies books. And kiddies books aren't used at the college level.

If you dont understand that, you don't understand even the first semester.
google to your hearts content is you want. add the words astrology and
tele-kenesis to your google and see how many hits you get.


Jax,

This is so much like when I was a GA.
"Yes" is not a complete answer.

So...I Repeat
If not Bernoulli, Then perhaps you will explain to the readers how the
Kutta-Zhukovsky Theorem can explain everything without assistance of the
equations set out by Daniel Beroulli.

Or, did you have something else in mind?

Please elaborate, we are waiting Oh so patiently.
There are two DC's here wait to hear.

Matt Colie - See Prior Sig



JAXAshby wrote:
yes.


From: Matt Colie
Date: 8/28/2004 4:30 PM Eastern Daylight Time
Message-id:

Jax,

How much have you studied the response of sails?

By studied, I mean with real data from instruments calibrated to
accepted standards and in standardized conditons.

If not Bernoulli, Then perhaps you will explain to the readers how the
Kutta-Zhukovsky Theorem can explain everything without assistance of the
equations set out by Daniel Beroulli. Or, did you have something else
in mind?

Matt Colie (CV by request only)

JAXAshby wrote:

Try some "Bernoulli experiments for kids",and you will reach a better
understanding.


no, you won't. wings/sails do not have lift because of "Bernoulli"
inspite

of

the fact you can read such in thousands of kiddie books.

Mr. Jax,

You STILL have not answered the question.

I would not stand for this then and I still won't.

If you have a contrary point to make, you have to defend it. I never
said you were wrong or right and I even tried to help.

Actually, I guess I won't try any longer as we are not getting anything
of value covered here today.

Dismissed

Matt Colie

JAXAshby wrote:
matt, give it up. beernoulli is not part of any theory of flight. none.
except in kiddies books. And kiddies books aren't used at the college level.

If you dont understand that, you don't understand even the first semester.
google to your hearts content is you want. add the words astrology and
tele-kenesis to your google and see how many hits you get.



Jax,

This is so much like when I was a GA.
"Yes" is not a complete answer.

So...I Repeat
If not Bernoulli, Then perhaps you will explain to the readers how the
Kutta-Zhukovsky Theorem can explain everything without assistance of the
equations set out by Daniel Beroulli.

Or, did you have something else in mind?

Please elaborate, we are waiting Oh so patiently.
There are two DC's here wait to hear.

Matt Colie - See Prior Sig



JAXAshby wrote:

yes.



From: Matt Colie
Date: 8/28/2004 4:30 PM Eastern Daylight Time
Message-id:

Jax,

How much have you studied the response of sails?

By studied, I mean with real data from instruments calibrated to
accepted standards and in standardized conditons.

If not Bernoulli, Then perhaps you will explain to the readers how the
Kutta-Zhukovsky Theorem can explain everything without assistance of the
equations set out by Daniel Beroulli. Or, did you have something else
in mind?

Matt Colie (CV by request only)

JAXAshby wrote:


Try some "Bernoulli experiments for kids",and you will reach a better
understanding.


no, you won't. wings/sails do not have lift because of "Bernoulli"

inspite

of


the fact you can read such in thousands of kiddie books.

Matt,

the secret is in the reading of the rest of his insightful replies to the
group. I know, not a pleasant thought - but essential.

The Bernoulli quote was from me, and the refutation "do not have lift
because of "Bernoulli" inspite of... blah, blah" says a lot more about him
than it does about physics. The earth doesn't have gravity because of
Newton, and dark matter isn't necessarily a figment of someone's
imagination, just because JAXAshby can't hold it in his hands.

Try not to feed the guy! Feel free to respond to the original post,
though...


"Matt Colie" wrote in message
...
Jax,

How much have you studied the response of sails?

By studied, I mean with real data from instruments calibrated to
accepted standards and in standardized conditons.

If not Bernoulli, Then perhaps you will explain to the readers how the
Kutta-Zhukovsky Theorem can explain everything without assistance of the
equations set out by Daniel Beroulli. Or, did you have something else
in mind?

Matt Colie (CV by request only)

JAXAshby wrote:
Try some "Bernoulli experiments for kids",and you will reach a better
understanding.


no, you won't. wings/sails do not have lift because of "Bernoulli"
inspite of
the fact you can read such in thousands of kiddie books.

ac, you know nothing until you hear a 10 second sound bite on CNN or read a
Popular Mechanix article, then you know everything.

From: "AC"
Date: 8/29/2004 1:51 AM Eastern Daylight Time
Message-id:

Matt,

the secret is in the reading of the rest of his insightful replies to the
group. I know, not a pleasant thought - but essential.

The Bernoulli quote was from me, and the refutation "do not have lift
because of "Bernoulli" inspite of... blah, blah" says a lot more about him
than it does about physics. The earth doesn't have gravity because of
Newton, and dark matter isn't necessarily a figment of someone's
imagination, just because JAXAshby can't hold it in his hands.

Try not to feed the guy! Feel free to respond to the original post,
though...


"Matt Colie" wrote in message
...
Jax,

How much have you studied the response of sails?

By studied, I mean with real data from instruments calibrated to
accepted standards and in standardized conditons.

If not Bernoulli, Then perhaps you will explain to the readers how the
Kutta-Zhukovsky Theorem can explain everything without assistance of the
equations set out by Daniel Beroulli. Or, did you have something else
in mind?

Matt Colie (CV by request only)

JAXAshby wrote:
Try some "Bernoulli experiments for kids",and you will reach a better
understanding.


no, you won't. wings/sails do not have lift because of "Bernoulli"
inspite of
the fact you can read such in thousands of kiddie books.