Grasshopper

algorithmic modeling for Rhino

Used only for visualization... the sail geometry is not accurate, its eyeballed. :D

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Comment by Yujihoon on June 7, 2013 at 12:14am

awesome.!!

Comment by esc11 on June 6, 2013 at 12:47pm

amazing!!!!!

Comment by Will Krzymowski on June 5, 2013 at 6:06pm

:D

Comment by Fred Becquelin on June 5, 2013 at 4:05pm

[...] for a given direction and a given wave height and a given load case and a given helmsman age and a given beverage and ...

Comment by Will Krzymowski on June 3, 2013 at 6:10pm

I was just reading about this in Fabio Fossati's book on aero/hydro dynamics.

Comment by Danny Boyes on June 3, 2013 at 12:14pm

* for a given direction 

Comment by Danny Boyes on June 3, 2013 at 12:14pm

each sail is trimmed so different

That is because each sail effects the others. Which is why a una rig cannot sheet its mainsail on the centerline without stalling out but a sloop yacht can, due to the "bending" of the angle of incidence as the air flows around the headsail.

But the perfect set up will always be the perfect set up a given direction

Comment by Will Krzymowski on June 3, 2013 at 11:58am

yes, i could have gotten very ambitious with this, starting with expanding my understanding of kangaroo. I think danny's idea would be very quick to implement, and I may still do that. I decided manually position everything because in my observations, each sail is trimmed so different that I couldn't apply a one size fits all script. I was using lots of photgraphs to find appropriate looking angles. My foil shapes are less than impressive as well, but for the rendering... it looked alright. Thanks for the comments.

Comment by Danny Boyes on June 3, 2013 at 2:05am

Hi Will,

Very nice! You should consider having one slider representing wind direction and have the angle of incidence set as a parameter for each one so that they all change together.

Comment by 筑梦NARUTO on June 1, 2013 at 9:38pm

To elaborate on the logic of this algorithm, thank you

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