Hi all, Has anyone got any complete CAD for a dinghy? hull, decks, sails, crew? Preferably from an olympic class or at least something...
Jim Hog. If a sail works by drag how can you explain a boat travelling to windward?
I am going to stick my neck out here for the barrage of abuse! The previous rules provided us with the most exciting racing that has been seen in...
flatten the sail first, using rake and cunningham. Remember you should also try to flatten the foresail if possible, by changing the sheeting...
I am based in Nottingham. I am currently doing a Phd with the CFD group at Nottingham Uni but am going for a work placement in a few months...
Sorry to appear naive but what is Savitsky? I am CFD engineer and am new to the marin e thing. Is it a VPP progam or panel method? Also why...
Has anyone modelled planing hulls with CFD to any sucess? I am guessing it is pretty damm difficult with free surfaces and mesh deformation and...
Anyone fancy sharing their thoughts on T-Foil rudders? I take it the idea is to lift the stern? does this not just bury the nose?
Tspeer - you seem to know a bit about this XFOIL, is it easy to use? I also think it would make an interesting study to compare viscous CFD with...
If you take the mast and the sail as seperate entities they both have a drag and lift force assosiated to them. Together they create a total drag...
I disagree on your comment upon lift and drag. Round sections do not create as much lift and create more drag than elongated. The actual flow...
It's probably because the classes that have the flexibilty to rotate masts probably also have the freedom to change the mast shape, and an...
If you find me the geometries in a CAD format, I can probably run them for you. The rotation would definately help the flow, both in increasing...
Thanks for the AYRS, it seems like a good place to start.
Decided to do a bit of work on this. I have rotated various mast sections and have found really incredible results. Reductions in drag of 60%...
There is no exact formula otherwise a computer could win the olympics. The mast bends obviously from as soon as the wind blows. And this can be...
If you were to imagine a graph of heeling moment vs wind strength. There is obvisouly a maximum righting moment that you can exert. in theory...
Thanks for the paper, really useful. I will have a read tonight. From memory though isn;t XFOIL an advanced panel methos, from that I would...
Thinking about it in more depth I suppose that the mast actually will stay aligned better with the sail that with a fixed mast therefore the luff...
Great thread everyone, i think it's really interseting. I am looking into it at the moment and running some models and will let you know what I...