Home |
Search |
Today's Posts |
#10
|
|||
|
|||
how a sail works, who can help me explain?
I think you should do a little research into Bernouilli and Venturi.
"PIM" wrote in message ... "Simple Simon" wrote The convex side of the sail or the leeward side directs the air over a longer path. This longer path for the air lowers the pressure because said air must move faster to cover the increased cord. Faster flow equals lower pressure. This low pressure combined with the normal or slightly increased pressure on the windward side is what creates lift. Dear Simon, I am not neglecting what happens on the leeward of the sail, the leeward of the sail is also deflecting air and thereby creating lift. as I am explaining in www.sailtheory.com/sail.html According the "longer path theory" you use it would not matter how much you pull your sail in, since there is always the same difference in pathlength between windward and leeward. Please read www.sailtheory.com/wrongtheory.html for more examples why it is wrong. The "longer path theory" is not easy to use and is wrong. It is the reason I started my site. Clearly I am not clear enough at this point Many agree with me that the longer path theory is wrong: jeff raskin: http://tinylink.com/?RD9ntJyTuz university frankfurt (under 2.2) http://www.informatik.uni-frankfurt..../MIS/mis6.html University of washinton: http://www.aa.washington.edu/faculty/eberhardt/lift.htm Bill beaty: http://www.amasci.com/miscon/miscon4.html#wing And so do the most aerodynamicists as far as I know. I tried to adjust above theories from a wing into a sail. Best Regards Pim -- Posted by news://news.nb.nu |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
tyvek (long) | Boat Building | |||
Sail Modifications | Cruising | |||
What sail for a 12 ft. skiff? | Boat Building | |||
Removing Adhesive from Sail Numbers on sail | General | |||
Birds nests in sail folds?? | Cruising |