Sail away with Alexander!
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The Physics of Sailing
Sailing history is about 500 years old. In the early days we thought that
the sails can only push the boat in more or less one direction. Now we know
that the sails can also lift the boat enabling it to go in almost any
direction. Here are some physics of sailing to help you master the modern
KQED has run some tests to discover how modern sailing can profit from
understanding how air travels!
I was confused as to why a keel would generate lift, but I think I
understand now. The keel typically has a teardrop shape but the shape is
symmetrical and the keel does not *seem* to be upturned into the oncoming
water like an airplane wing needs to be. You have to have one or other.
Either you have to have an asymmetrical wing so that fluid travels faster
over one surface, or you have to upturn the wing. A keel leans in the water
but its leading edge is not upturned. However, the reason the keel does
generate lateral lift is due to the ‘angle of attack’ of the boat. A
sailboat does not travel ‘head on’ through the water. It travels at a
slightly skewed angle off center (think moving forward while the hull is
turned slightly to port or starboard). It’s this skewing that ‘upturns’ the
keel wing and causes lift.
500 years? I thought the Chinese were sailing 800 years or more?
really awesome vid had no idea
The emphasis that that’s how “modern” sailing works is a bit stupid.
Fore-and-aft rigs have been around for hundreds of years. Old vessels, even
square riggers, could be fast and sail upwind. Replica tall ships have been
know to outrun modern yachts fairly often.
How can a #boat sail into the wind? A short introduction to the physics of
#sailing » youtu.be/yqwb4HIrORM ⛵
para mis amigos navegantes
Good video about generating lift from the sails and countering it with lift
from the keel… how to shape your sail so the tell tails are flying
instead of hanging… hmmm, reminds me I need to clean up my tell tails so
they aren’t so fuzzy!
Comment marche un voilier ? Voilà la (les) réponse(s) !
7:47 watch the two sailboats and the motorboat, above the sailboat with the
red sail – almost a bonus clip with a sail disaster, and a lesion by
itself; How to NOT maneuver a boat in crowded situations.
“produced in high definition” only plays in 360p
Square riggers can go at about 210-240 degrees from the wind (but couldn’t
as fast at that angle) and can tack over it, however a square rigged ship
in the form of a frigate could sometimes outrun sloops 1/50 of the size due
to square rig being better at holding air at 0-60 degrees of the winds
… lets put it this way, modern sails would never give enough wind to a
Man O War…
1:52 I was dying that that jib sheet wasn’t being pulled!
modern sailboats have it only? look at the old Dutch boats, we use it
already for age’s
I’m a major sailor. I know a lot about sailing and have been doing it for
some time… when I first watched this video it made me laugh.
wishy washy kinda
Hey guys. Here’s a neat video explaining the physics of sailing into the
wind (old square sail ships couldn’t do this)
Hard to take this seriously when the first thing they say is completely
wrong. Square-rigged ships can most certainly sail into the wind. It’s true
that they can’t lie as close to the wind as a fore-and-aft rigged ship, but
they can tack.There’s no way Magellan, Drake etc. could have made it around
the world in ships that only sailed with the wind. Getting around Cape Horn
from east to west is impossible if you can’t sail your ship into the wind.
a luffing sail and a stall on an airplane wing are not aerodynamically
Scientists are terrible at explaining things lol
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