America's Cup

[Mo NZ]

The guys kept on grinding throughout.
They must be hanging coconuts down there.

[Madness]

A little too much excitement for that early on a Sunday morning for me.

[awa355]

I see that there is yet another take from the Hitler film, this time a spoof of the Americas cup. Wont bother posting a link to it, This scene has been done to death over various topics.

As for todays race, I went to my usual You tube channel for a complete replay And get, this race is ' not avalible ' All the other races are avalible.

[Mo NZ]

http://tvnz.co.nz/americas-cup-2013/...-video-5584517

[onearmedbandit]

I see that there is yet another take from the Hitler film, this time a spoof of the Americas cup. Wont bother posting a link to it, This scene has been done to death over various topics.

As for todays race, I went to my usual You tube channel for a complete replay And get, this race is ' not avalible ' All the other races are avalible.

TVNZ on demand is pretty good.

[awa355]

TVNZ on demand is pretty good.

Thanks, have found the coverage of todays races there. here are a couple of stills from todays races.

[st00ji]

i cant believe no-one has trotted out the tired old powerbands thing yet

[awa355]

Looking at the improved performance of Oracle in todays races, TNZ may not have a straight run to the finish line.

A couple more images from today.

[Winston001]

I learnt in sailing dingies and it was a fun thing to learn in cats.

For this discussion 0 degrees is the wind coming from the front of the boat, 90 degrees directly from the side and 180 degrees from the rear.

- Imagine a cat sitting still in the water at 90 degrees to the wind.

- Now as the cat starts to sail forward, still at 90 degrees to the true wind the apparent wind direction starts to swing towards the front of the boat. Now if the cat is doing 20 knots water speed in this 20 knot wind the apparent wind direction will swing to 45 degrees.

- These cats can easily do 40 knots water speed in 20 knots of wind in a broad reach (~90 degrees to the wind). At that speed the apparent direction would be 26 degrees (atan .5). The wind speed that the boat experiences is root 5 or 2.23 * 20 = 44.7 knots (you've heard of boats making their own wind).

- So at this heading 90, the apparent wind is 26 degrees at 44 knots. See that scool c maths was useful after all.

- Now start turning this imaginary boat to head "down wind" a little bit. The wind is still coming from the front of the boat and the speed and apparent direction and spped is still fromthe front and way faster than the wind.

- With these boats with their wing sails they can turn a long way down wind and keep the boat speed up. This results in their VMG towards the mark being higher than 20 knots (= true wind speed)

- So the boat is heading down wind, and the apparent wind is still from the front of the boat. So they tack rather than gybe down wind.

You have my deepest respect. I remember learning sin, cosine, and tan in maths, and vectors triangles etc but you lost me. Shag, I did physics to the 6th form but even so...does Boyles Law help??

Anyway you are spot on and have saved me a question: on Friday NZL was at 44knts in a 20knt breeze which just seemed so far beyond the possibilities of pressure on a 45 degree face that it was impossible. Clearly it is possible.

[BMWST?]

...does Boyles Law help?? ;:

no sorry it does not,its all about geomety and trig mate,although boyles law can be applied to the hydraulics

[paturoa]

...does Boyles Law help??

...although boyles law can be applied ....

I had a boil on my arse once and I can say without any doubt that that was not fun on a long bike ride!

[ellipsis]

no sorry it does not,its all about geomety and trig mate,although boyles law can be applied to the hydraulics

...and rawleighs for drybaulics...

[Rcktfsh]

I had a boil on my arse once and I can say without any doubt that that was not fun on a long bike ride!

However Sir Russell Coutts when he was plain on Russell Coutts famously won a gold medal at the 84 LA Olympics in the Finn class despite developing a large boil on his arse during the event.

[ellipsis]

...Pinky Lester who commentates and such was one of us Lyttelton louts... played rugby and sung badly in the Royal Hotel afterwards...that was as bad as a boil on the arse...

[BMWST?]

sorry i seem to have stumbled into the associations thread