Yes Jax,

The sail works because it is curved. It provides the force to move the
boat on a Reach and on a Close Haul.

Since you don't know why and are denying the statements you've made in
replies.Both about the curve and force vectors, it is time for
enlightenment.

I'll try. I was just made aware of the Newtonian Theory this past
season. This discussion group made me aware of it and I have brought
into it. So, I'm not pretending to be an expert BUT I damn well know why
the curve on the Lee side is necessary, I've done some studying;

Newton said for every ACTION there is created an EQUAL and OPPOSITE
REACTION.
So that Action on the lee side of the Sail causes the air to go in
a leeward motion. This is caused by the CURVE in the sail ( On a wing it
would be the curved section of the airfoil)
This Leeward action of the air away from the Lee side of the sail
creates a need for air on the Lee side of the sail. This need is
supplied by the relative stationary air, behind the deflected air
caused by the curve on the leading edge of the curved sail. This air
rushes against the Lee side of the after section of the curve sail and
slides off the leech of the sail. This Force of Air is the ACTION,
Newton Law needed to create the REACTION from the air on windward side
of the sail.
There is another action that takes place with the air sliding off
the Leech. It is called the COANDER EFFECT. This is caused by the
surface tension on the boundary layers causing the air sliding backward
to turn and aid the reaction force

Now, the curve of the Sail is necessary to keep the air in contact with
the sail (Boundary flow) until we want it to separate with the minimum
turbulence to allow the forward air to slide down and over the after
part of the sail

My apologise to all you informed sailors for my crude attempt to explain
Newton's Law (F=ma). To all but Jax who had his chance

I"ll need a:"DRINK TO THAT" for venturing where Angels fear to thread

Ole Thom

old man, a little knowledge is a dangerous thing. in your case, you have
damned little knowledge.

now, you are saying WHAT? that an airfoil wouldn't work if both sides of it
are curved, and curved in the same direction?

dude, maybe you might spend some time at any local airport, unless of course
you continue to believe that trash you spewed before that a verticle surface
acts under different air forces than a horizontal surface.

old man, give it up. you told one and all of your utter ignorance when you
said,

I was just made aware of the Newtonian Theory

[snip the rest of thomie's beer hall meanderings]

Jax,

You seem to be afraid to talk in terms of SAILING!

You go to the local airport. I have all the I have to see at the Harbor.
YOU SHOULD GO THERE. You just might learn something about SAILING.

Jax, you can't seem to complete the transition of the aircraft wing to
that of a flexible sail using Newton's Laws of Motion.

You can't seem to remember that it was YOU that turned me onto Newton
theory. It is a crying shame that you don't seem to have the ability to
convert the theory into practical usage.

Ole Thom

May be there is no such thing as a straight line. After all, space is
curved.

Cheers

JAXAshby wrote:

You also know that "Chord" is used as a measurement in Airfoil
dimensions.


incredible that the olde fart thinks a curved line is straight.

Nav;

That was Jax. I said a Chord was a straight line that touched a curve at
tow places and sometimes used in airfoil design.

He couldn't answer the question and he had to invent something that he
could knock. Pay no attention when he is pinned, he'll write a reply to
his own lie. Something like Simple Sieman.(Puts in his thumb and pulls
out a plum and says; "What a good boy am I!").

Ole Thom
P/S A "CHORD" is used in a Airfoil to measure the leading edge to the
trailing edge. That is for Jax's benifit not yours

old man, you keep trying to tell us that air flowing over a verticle surface is
somehow different in its reaction to the surface than air flowing over a
horizontal surface.

Are ever have you been drinking/smoking/chewing?

Jax,

You seem to be afraid to talk in terms of SAILING!

You go to the local airport. I have all the I have to see at the Harbor.
YOU SHOULD GO THERE. You just might learn something about SAILING.

Jax, you can't seem to complete the transition of the aircraft wing to
that of a flexible sail using Newton's Laws of Motion.

You can't seem to remember that it was YOU that turned me onto Newton
theory. It is a crying shame that you don't seem to have the ability to
convert the theory into practical usage.

Ole Thom

May be there is no such thing as a straight line. After all, space is
curved.

Cheers

only in some universes.

I said a Chord was a straight line that touched a curve at
tow places and sometimes used in airfoil design.

sometimes, old man??

Ole Thom
P/S A "CHORD" is used in a Airfoil to measure the leading edge to the
trailing edge. That is for Jax's benifit not yours

old man, that is what I said from the beginning. maybe you were too zonked out
to recall you said a chord is a curved line, maybe you were still to zonked out
to remember that I posted a direct definition of chord, and maybe STILL to
zonked out to recall any of that now.

Jax;

You're having a very hard time remembering all your lies. They're all
just smoke anyway.

You still haven't answered, THE QUESTION. How do you trim YOUR SAILS
for Max Efficiency for Newton's Laws?

I answered the main part of the question. I'm leaving the part of Trim
for you. I'll not answer for you. I really don't think you know what to
look for but, it's all yours. Prove me wrong. Tell us, one and all, How
to trim for Close Haul, Close Reach, Broad Reach and Down Wind.

I really thought you let this post die. I did. It seems you have more
lies to tell but no answers.

Have you found something that tells you what to look for as you trim?
Trim a Sail on a Sail Powered Vessel.

Don't tell us about a SAIL with one Curved Side. We don't need to know
about Ground Effect on a Sailboat. A sailor isn't really concerned with
Downdraft or Updraft. We don't have Flaps or Props or Jets.

A Sailor has Halyards, Outhauls, Sheets, Sheeting Angles, Cunninghams,
Vangs, Back stay adjustments, Forestay tension, Barbar hauls. These are
the main adjustments. I won't ask you about Jumper stays or Jack stays

Tells us just how you use and set them for different wind strengths and
directions?
I know you must have some idea about their use. I know I've given you
enough time to research their use. Tell us, Oh Wise One?

Jax, I'm finished with this Post. You've been Busted to Pieces. I have
nothing more to prove with you. You have had enough time to answer the
original Question. ANSWER IT! You might save some of your dignity. I
dought it.

I've already released you, Little Fishy, stay away from the Hook!

Ole Thom

Jax, I'm finished with this Post.

it is about damned time, old man. you hve been incoherent from the start.