Underwater sails?
 

Parallax says :

At the risk of starting a flame war:

Uh-huh?

Most keels do NOT act as vertical wings but only provide a lateral
force to resist windage and to keep the boat going straight. To be a
good wing, they would have to have an assymetrical cross section.

No-one claimed they were a "good" wing, just a wing. Mostl planes would fly
pretty nicely with a symmetrical section if there is enough alpha applied ;-)

Steve "dons flame-proof undies just in case..."

Underwater sails?
 

On 6 May 2004 05:39:49 -0700, (Parallax) wrote:

"Newdirections Int [Australia]" wrote in message ...
Think of a sailing boat as an aircraft on its side. That's what, in
principle, happens///

"Parallax" wrote in message
om...

Most keels do NOT act as vertical wings but only provide a lateral
force to resist windage and to keep the boat going straight. To be a
good wing, they would have to have an assymetrical cross section.


Airplanes that spend much time inverted often use symmetrical wing
sections.

Brian W

Underwater sails?
 

On 06 May 2004 13:44:49 GMT, ospam (Stephen Baker)
wrote:

Parallax says :

At the risk of starting a flame war:

Uh-huh?

Most keels do NOT act as vertical wings but only provide a lateral
force to resist windage and to keep the boat going straight. To be a
good wing, they would have to have an assymetrical cross section.

No-one claimed they were a "good" wing, just a wing. Mostl planes would fly
pretty nicely with a symmetrical section if there is enough alpha applied ;-)

Indeed, aerobatic biplanes normally have symmetrical wing foils. A
"good" wing for a symmetrical situation is symmetrical.

Any boat with pretense of performance in recent years has had
consciously designed underwater foils, often done with hydrodynamic
simulations.


Rodney Myrvaagnes J36 Gjo/a


Ask not with whom the buck stops . . .

Underwater sails?
 

Steve "dons flame-proof undies just in case..."

Is the normal use of such undies to protect innocent bystanders from the
effects of flatulance? If so, does it increase the burning effect of rich
curries on the wearer?

Underwater sails?
 

Paul Squire says:

Steve "dons flame-proof undies just in case..."

Is the normal use of such undies to protect innocent bystanders from the
effects of flatulance?

No, it is to protect the wearer from the flames of others. Kind of a virtual
Usenet flak-jacket. And they don't work very well...

Steve