modern sails spun off mechanical flight technology?
 

Gilligan wrote:
"Joe" wrote in message
ps.com...


I think you may be overlooking the dhow with it's lateen rigs from
some 2000 years ago.

The ones sailing the Nile?


Yes, just like the Egyptian gliders of the time:

http://www.catchpenny.org/model.html

http://www.huge-entity.com/2005/10/a...g-machine.html

The development of the glider lead to sailboats sailing into the wind.

That is clearly a early Windex or wind vane, put atop a sailing mast.
It was found with a boat and mast BTW.

Joe

Crickey!

modern sails spun off mechanical flight technology?
 

OzOne wrote in message ...

I would suggest that using this hypothesis, a ball can fly.


Yes it can if it has backspin because it would exhibit aerodynamic lift.
Check out the magnus effect:

http://en.wikipedia.org/wiki/Magnus_effect


Man was flying 2500 years ago:

http://luban.quickseek.com/


Still before the dhow.

Try again.

modern sails spun off mechanical flight technology?
 

OzOne wrote in message ...
On Thu, 5 Oct 2006 19:51:51 -0600, "Gilligan"
scribbled thusly:


OzOne wrote in message
. ..

I think you may be overlooking the dhow with it's lateen rigs from
some 2000 years ago.

You may be overlooking the fact the had no keel and sailed at best with
the
wind abeam, not into the wind. Show me proof.

You may have overlooked the fact that many boats without keels have
very good windward performance.
My cats and dhows with leeboards included

Question: if a square rig's sails could be turned 90 deg (with the wind
abeam), and a centerboard or sideboard were dropped to resist sideways
movement, and enough ballast were present to prevent capsize, could the boat
move in a track that is more perpendicular relative to the wind? I.e., is it
only the "lift" that makes a boat move forward when not going downwind?
Scout - (prepares himself for 2 one word answers)

modern sails spun off mechanical flight technology?
 

Gilligan" wrote in message . ..

"Scout" wrote in message ...
Read that somewhere recently.
I knew downwind sailing was "it" for a very long time, but did the concept of sailing to wind really come about with the evolution of the wing and mechanical flight?
Scout


Right you are Scout. The first heavy lift gliders came about before 1800. You can see that the technology existed in planes before it got around to sailboats.

http://www.first-to-fly.com/History/...e/firstair.htm

Most of the people here are not knowledgeable in the ways of science. It was once said that science was too important to be left for the scientists. But laymen have neither the training or the inclination for scientific thought. I will no longer sit back and allow non science opinion, non science indoctrination and the international non science conspiracy to sap and irrationalize our precious scientific thought. Have you ever seen a non scientist drink water? Distilled, pure, ion free water? That's right, your typical non scientist does not drink pure distilled water. Their precious bodily fluids are impure and their capacity for scientific thought is impaired. This all became apparent to me during the act of calculating. I assure you my scientific essence remains pure, though I deny non scientists the benefits of my calculations.

It would not be difficult Mein Fuhrer! . . . I'm sorry, Mr. President.
Scout

modern sails spun off mechanical flight technology?
 

Scout wrote:

Question: if a square rig's sails could be turned 90 deg (with the wind
abeam), and a centerboard or sideboard were dropped to resist sideways
movement, and enough ballast were present to prevent capsize, could the boat
move in a track that is more perpendicular relative to the wind?


More perpedicular? More perpendicular than what? Since a square rigger
can sail on a beam reach 90 deg to the wind without much problem, the
answer would be no. You can't get any more perpendicular than 90 deg.

Somehow I don't think this is what you are asking...

I.e., is it
only the "lift" that makes a boat move forward when not going downwind?

No, there are other forces like current and waves that make the boat go
in certain directions.

Somehow I don't think this is what you are asking either...

//Walt

modern sails spun off mechanical flight technology?
 

OzOne wrote in message
...




Can I answer that in the morning,
went to a new Italian restaurant opening tonight..

They won't survive........

Bad food or too expensive?



The whine was good!

you whine too much!

Scooter

modern sails spun off mechanical flight technology?
 

Scotty wrote:
OzOne wrote in message
...

Can I answer that in the morning,
went to a new Italian restaurant opening tonight..

They won't survive........

Bad food or too expensive?



The whine was good!

you whine too much!

Scooter



There are far too many Italian restaurants in the world anyway...and the
preponderance serve bad food...I like Tuscan cuisine but finding food
restaurants that serve it well is difficult...

modern sails spun off mechanical flight technology?
 

"katy" wrote in message
...
Scotty wrote:
OzOne wrote in message
...

Can I answer that in the morning,
went to a new Italian restaurant opening tonight..

They won't survive........

Bad food or too expensive?



The whine was good!

you whine too much!

Scooter



There are far too many Italian restaurants in the world
anyway...and the
preponderance serve bad food...I like Tuscan cuisine but
finding food
restaurants that serve it well is difficult...

Ugh, ever been to an Olive Garden? there food is OK, a bit
mediocre IMO, but there is always a line to get into the
place. Guess nobody cooks anymore.

Scotty

modern sails spun off mechanical flight technology?
 

Scotty wrote:
"katy" wrote in message
...
Scotty wrote:
OzOne wrote in message
...
Can I answer that in the morning,
went to a new Italian restaurant opening tonight..

They won't survive........
Bad food or too expensive?



The whine was good!
you whine too much!

Scooter



There are far too many Italian restaurants in the world
anyway...and the
preponderance serve bad food...I like Tuscan cuisine but
finding food
restaurants that serve it well is difficult...

Ugh, ever been to an Olive Garden? there food is OK, a bit
mediocre IMO, but there is always a line to get into the
place. Guess nobody cooks anymore.

Scotty


Franchise restaurants very rarely have good food (IMO) When I go out to
eat, I want the food to be worth the money I spent. You don't expect
good food at Olive Garden, you just go there because it's convenient and
cheap. Same goes for places like Appleby's and Fridays...

modern sails spun off mechanical flight technology?
 

Charlie Morgan wrote:
On Fri, 06 Oct 2006 10:51:02 -0400, katy
wrote:

Scotty wrote:
"katy" wrote in message
...
Scotty wrote:
OzOne wrote in message
...
Can I answer that in the morning,
went to a new Italian restaurant opening tonight..

They won't survive........
Bad food or too expensive?



The whine was good!
you whine too much!

Scooter



There are far too many Italian restaurants in the world
anyway...and the
preponderance serve bad food...I like Tuscan cuisine but
finding food
restaurants that serve it well is difficult...
Ugh, ever been to an Olive Garden? there food is OK, a bit
mediocre IMO, but there is always a line to get into the
place. Guess nobody cooks anymore.

Scotty


Franchise restaurants very rarely have good food (IMO) When I go out to
eat, I want the food to be worth the money I spent. You don't expect
good food at Olive Garden, you just go there because it's convenient and
cheap. Same goes for places like Appleby's and Fridays...

You can't expect much from places where the "chefs" are high school
kids working for minimum wage.

CWM

True. My in-laws used to hit those places almost every night when they
retired. Thing was, their food was better than anything my m-i-l could
prepare. You see many senior citizens who go that route...and the Jimmy
Dean place...guess it's better than Meals on Wheels...