Hi, I'm still very part time on that topic. I still believe that the target is achievable. However, because of my lack of academic knowledge on...
I fully agree with you Skyak. I don't focus yet on sailcloth stretch. However this is an embedded feature of the elements used in the FEM tool....
Thanks Mikko for the link to the above thread. I went through it and learned several interesting things: the important relation about this head...
I just had a look, ans it seems to me a GUI for Openfoam, and handle the CFD part. From the website, it does not looks to address the Structure...
Update about the slow process... I have notr given-up but this is really tough for me. MBDyn certainly can do the job, but the lack of pre and...
I don't really understand the benefits of that "sweep". For fore-aft = rake, I had looked at the wings design and the "sweep" was interesting at...
Dear Mikko, Your post looks thought provoking to me, as it goes against the general idea that fatheads sails are the norm now. Your experience...
Thanks for the paper Remmlinger, This is a good point to take into account. For the sails I'm interested it, there is a fabric luff pocket in...
Thanks Steve, and also others, for the responses to my question. I'm comforted by the above statement that a key driver is the de-powering of the...
One sentence I picked about the "Square top" in Tom Speer text (from Minimum Induced Drag of Sail Rigs and Hydrofoils...
Thanks all for the provided information, So the Square Top results from: - the optimization of the sail planform for some criteria, - the trapeze...
Thanks geo2 for the information. Unfortunatly I'm neither a student nor an academic. 3 year trial still looks appealing (more than 3 or 6 month)...
Thanks Erwan and Dogcavalry four your answers. So this is about limiting the drag and lift distribution. I have looked at Tom Speers documents on...
Catamarans, trimarans, landyacht, windsurf have square top sails. I wonder how can be determined the optimum sail square head width. Especially in...
I'm a FreeCAD user. I already used the FEM workbech for simple static simulations. Some people also work on a MBDyn workbench. This position...
Hello, Since some months, I can't refrain a need to better understand mast / sails interactions for simple rigs like small landyachts, like very...
Reboot. Post above showed that the mast curve was "smooth", and without kink. Went back to the sail/mast fit (back to basics). In order to better...
Today = measurements. I set-up something roughtly representative of sailing geometry. I sheeted "hard" to see if a kink in the mast shape appears...
Oh, and to complement, my intention is: - either get my alu mast have an even bending under load, by adding stiffners at joints, if this is...
I crunched the numbers according to the formulas above. Attached at the bottom. Deflexion from stress would account for twice the one of the fit...
