best home trainer for sailing

[Shebeen]

Co-linear? ie the direction of the wind and the boat are the same? No sailing at an angle to the wind.

 

If so, how so?

All about 'apparent wind' I'll let Iain explain with a bike - https://www.youtube.com/watch?v=voczYSeq9bI

 

Most boats are 'displacement', ie they float on water and need to push through the water to move. at a certain speed they can get 'planing', where the boat can 'skip' over the water - this has a lot less drag, and is thus faster.

 

To go faster it gets to the point of reducing drag. both aerodynamic and hydrodynamic.

foiling boats just put the boat up on a pedestal where it sits on a very low drag foil.

 

if you want to go really really sh|t your pants fast using the wind, then you need to go north. where these okes hang out.

 

[Pure Savage]

Co-linear? ie the direction of the wind and the boat are the same? No sailing at an angle to the wind.

 

If so, how so?

 

You might see a recorded wind speed of 12-15 knots, while the boats reach more than 52 knots. That is equivalent to 60mph and still nowhere near maximum speed.

It might seem like magic but the state-of-the-art 50ft long, 80ft tall America’s Cup Class (ACC) boats are able to harness the wind with devastating efficiency.

Land Rover BAR’s America’s Cup boat’s secret weapon is a giant 23-metre wing ‒ as long as a single wing on a Boeing 737. And it works exactly the same way, by generating lift, only in this case the “lift” is horizontal.

[Fat Boab]

All about 'apparent wind' I'll let Iain explain with a bike - https://www.youtube.com/watch?v=voczYSeq9bI

 

Most boats are 'displacement', ie they float on water and need to push through the water to move. at a certain speed they can get 'planing', where the boat can 'skip' over the water - this has a lot less drag, and is thus faster.

 

To go faster it gets to the point of reducing drag. both aerodynamic and hydrodynamic.

foiling boats just put the boat up on a pedestal where it sits on a very low drag foil.

 

if you want to go really really sh|t your pants fast using the wind, then you need to go north. where these okes hang out.

 

 

Interesting. Thanks for this. It's too late in the week for me, but I think I'm questioning actual wind vs apparent wind velocity (speed and direction). I get the concept of resolution of forces re apparent wind. 

[Fat Boab]

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You might see a recorded wind speed of 12-15 knots, while the boats reach more than 52 knots. That is equivalent to 60mph and still nowhere near maximum speed.

It might seem like magic but the state-of-the-art 50ft long, 80ft tall America’s Cup Class (ACC) boats are able to harness the wind with devastating efficiency.

Land Rover BAR’s America’s Cup boat’s secret weapon is a giant 23-metre wing ‒ as long as a single wing on a Boeing 737. And it works exactly the same way, by generating lift, only in this case the “lift” is horizontal.

 

Science? Then we would be talking about velocity and not merely speed, wouldn't we?

[Shebeen]

here's a snapshot from one of the races last week. 

 

wind is coming from right to left.

 

 

so both boats are going almost totally in the direction of the wind, they zig zag slightly with it to maximize the vector of movement in the direction they want to go.

[Shebeen]

Science? Then we would be talking about velocity and not merely speed, wouldn't we?

you want science...don't go here on a friday afternoon!

 

http://piccolboni.info/2013/09/the-greatest-sailing-race-of-all-time-seen-through-statistical-graphics.html

[Shebeen]

and a pretty picture. this is a polar plot of speed vs direction of wind. further from the centre - faster.

colour indicates true wind speed

 

http://i.imgur.com/lUDl8w6.jpg

[porqui]

How does using pedal power to raise and lower sails etc, rather than drive a propeller, make the boat go 3 times the speed of the wind?

 

Pedal power is used to drive hydraulic pumps to power the system to raise and lower the foils and the winches to set the sails

[Sepia]

you okes think I'm joking?!!!

 

from 2012 olympic bronze

 

 

to powering a boat that goes 3 times the speed of wind

 

http://www.newshub.co.nz/home/sport/2017/02/video-team-new-zealand-call-on-simon-van-velthooven/_jcr_content/par/brightcovevideo/image.img.1280.high.jpg/v0.jpg

 

 

 

When on a broad reach you end up beating.  Making your own wind to sail.  Truly a great experience, even on a 16 foot cat.

 

These machine must be absolutely frightening yet I would give a knack to wear one of those helmets.

 

(Done a bit of solo sailing in my time)