what about when a boat loses its keel (on a reef or some such), they still
sail … forwards! albeit less efficiently and somewhat dangerously, they
still ‘work’ from a momentum perspective. their forward moment is still
greater than the leeway, even without a keel.
this kind of ‘lift’ theory of aerodynamics has (in the past decade) been
quite disputed in the field of aerodynamics anyway, as many experiments
with airfoil (wing) designs which should not create any lift according to
this theory – do!
so this is not the whole story. it may play a part (maybe even a large
part) but its not a complete explanation of whats going on.
SuburbAllied
April 26, 2014
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.
Disabler
April 26, 2014
Scientists are terrible at explaining things lol
PLISKEN12
April 26, 2014
wishy washy kinda
Gilbert Pilz
April 26, 2014
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.
Yann Rousselot-Pailley
April 26, 2014
Comment marche un voilier ? Voilà la (les) réponse(s) !
bryan patterson
April 26, 2014
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!
Sugarsail1
April 26, 2014
a luffing sail and a stall on an airplane wing are not aerodynamically
equivalent.
Timothy Horita
April 26, 2014
Hey guys. Here’s a neat video explaining the physics of sailing into the
wind (old square sail ships couldn’t do this)
Ian Edmonds
April 26, 2014
That was fun.
Thanks
Mike Collins
April 26, 2014
“Square rigged ships only went in one basic direction – with the wind”
PARDON?! Clearly, this statement is false. What did they do if the wind
changed, or if they had to return home against the trade winds?
In fact, square riggers, while not as efficient to wind as a modern sailing
boat, could sail at a reasonably close angle to the wind.
Levi Partridge
April 26, 2014
lol lucky you’re doing it somewhere warm and not somewhere freezing like
Hamworthy (Poole, UK)
the most idiotic video ive ever seen!(from the eyes of a sailor).
Christopher Koffel
April 26, 2014
1:52 I was dying that that jib sheet wasn’t being pulled!
John Wilson
April 26, 2014
“A luffing sail is not the equivalent of stall on an aircraft”, per minute
7:40, it would be an over-trimmed sail.
Ali Nazari
April 26, 2014
Fantastic
aidtry182
April 26, 2014
I’ve always been so fascinated on how sailing ship works!!
detonatorJE
April 26, 2014
Hey guys, just a note about why lift happens, this guy is chatting bull.
Bernoullis law doesnt apply in the case of a wing (or sail). For his law to
apply, certain assumptions must be made. firstly that the fluid has zero
viscosity, but as we can see, the fluid ‘sticks’ to the shape of the wing,
which is a viscous effect. secondly, that it is a steady flow. which as
said in the video, it is not. Finally, Bernoullis theorem only applies to a
single flow, once you talk about flows above and below a wing, its moot.
While Bernoullis can describe some of what is happening, the fundamental
law behind lift is newtons 3rd. watch the flow as it comes off the wing,
its at a different angle, meaning a force was imparted on the air by the
wing, and thus vice versa
(im an aerospace engineering student and even people in the aero business
get this wrong (including the most of the internet), and this isnt coming
from me, this is coming from Dr Iain Dupere at Manchester University)
Saraleah Sands
April 26, 2014
When you blow on that piece of paper, does the Coanda effect help create
that lift ?
Raysnom II
April 26, 2014
Ryan Rodgers
April 26, 2014
Your model desperately l lacks sail trim. Move your jib cars back and for
the love of god, tighten your outhaul!
ageliki moulos
April 26, 2014
How do you guys (the sailing school) get away with completely inadequate
safety equipment for students? And then comically prodcast it to the whole
world via youtube. You should be closed down by the US authorities. Boyancy
aids. are not suitable life savers for offshore yacht sailing!! Inshore
dinghysailing with supervision maybe……….
Kirk R
April 26, 2014
I always thought that if I were to travel back thru time, this would be one
of the most valuable bits of knowledge to have.
Kronstadt Sailor
April 26, 2014
SQUARE RIGGERS CAN SAIL TO 90 DEGREEZ FROM FROM DA WIND
quosmo1
April 26, 2014what about when a boat loses its keel (on a reef or some such), they still
sail … forwards! albeit less efficiently and somewhat dangerously, they
still ‘work’ from a momentum perspective. their forward moment is still
greater than the leeway, even without a keel.
this kind of ‘lift’ theory of aerodynamics has (in the past decade) been
quite disputed in the field of aerodynamics anyway, as many experiments
with airfoil (wing) designs which should not create any lift according to
this theory – do!
so this is not the whole story. it may play a part (maybe even a large
part) but its not a complete explanation of whats going on.
SuburbAllied
April 26, 20147:47 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.
Disabler
April 26, 2014Scientists are terrible at explaining things lol
PLISKEN12
April 26, 2014wishy washy kinda
Gilbert Pilz
April 26, 2014Hard 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.
Yann Rousselot-Pailley
April 26, 2014Comment marche un voilier ? Voilà la (les) réponse(s) !
bryan patterson
April 26, 2014Good 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!
Sugarsail1
April 26, 2014a luffing sail and a stall on an airplane wing are not aerodynamically
equivalent.
Timothy Horita
April 26, 2014Hey guys. Here’s a neat video explaining the physics of sailing into the
wind (old square sail ships couldn’t do this)
Ian Edmonds
April 26, 2014That was fun.
Thanks
Mike Collins
April 26, 2014“Square rigged ships only went in one basic direction – with the wind”
PARDON?! Clearly, this statement is false. What did they do if the wind
changed, or if they had to return home against the trade winds?
In fact, square riggers, while not as efficient to wind as a modern sailing
boat, could sail at a reasonably close angle to the wind.
Levi Partridge
April 26, 2014lol lucky you’re doing it somewhere warm and not somewhere freezing like
Hamworthy (Poole, UK)
Sergio.J.V.
April 26, 2014Lift (in sails as in wings) is generated according to Newton’s 3rd:
http://www.grc.nasa.gov/WWW/k-12/airplane/lift1.html
David Galamov
April 26, 2014the most idiotic video ive ever seen!(from the eyes of a sailor).
Christopher Koffel
April 26, 20141:52 I was dying that that jib sheet wasn’t being pulled!
John Wilson
April 26, 2014“A luffing sail is not the equivalent of stall on an aircraft”, per minute
7:40, it would be an over-trimmed sail.
Ali Nazari
April 26, 2014Fantastic
aidtry182
April 26, 2014I’ve always been so fascinated on how sailing ship works!!
detonatorJE
April 26, 2014Hey guys, just a note about why lift happens, this guy is chatting bull.
Bernoullis law doesnt apply in the case of a wing (or sail). For his law to
apply, certain assumptions must be made. firstly that the fluid has zero
viscosity, but as we can see, the fluid ‘sticks’ to the shape of the wing,
which is a viscous effect. secondly, that it is a steady flow. which as
said in the video, it is not. Finally, Bernoullis theorem only applies to a
single flow, once you talk about flows above and below a wing, its moot.
While Bernoullis can describe some of what is happening, the fundamental
law behind lift is newtons 3rd. watch the flow as it comes off the wing,
its at a different angle, meaning a force was imparted on the air by the
wing, and thus vice versa
(im an aerospace engineering student and even people in the aero business
get this wrong (including the most of the internet), and this isnt coming
from me, this is coming from Dr Iain Dupere at Manchester University)
Saraleah Sands
April 26, 2014When you blow on that piece of paper, does the Coanda effect help create
that lift ?
Raysnom II
April 26, 2014Ryan Rodgers
April 26, 2014Your model desperately l lacks sail trim. Move your jib cars back and for
the love of god, tighten your outhaul!
ageliki moulos
April 26, 2014How do you guys (the sailing school) get away with completely inadequate
safety equipment for students? And then comically prodcast it to the whole
world via youtube. You should be closed down by the US authorities. Boyancy
aids. are not suitable life savers for offshore yacht sailing!! Inshore
dinghysailing with supervision maybe……….
Kirk R
April 26, 2014I always thought that if I were to travel back thru time, this would be one
of the most valuable bits of knowledge to have.
Kronstadt Sailor
April 26, 2014SQUARE RIGGERS CAN SAIL TO 90 DEGREEZ FROM FROM DA WIND