Personal opinion (I'm not a naval architect) 1) Re: " Would synthetic be better (lighter, cheaper, less corrosion) than aluminum for pontoons"...
Update. Interesting comments by CT249 on disadvantages of my design...
CT249, thanks for really interesting and comprehensive reply! "Wingmill" looks really unusual, I'll try to find more info about this vessel.
Thanks for info about Francis Herreshoff and Frank Bethwaite! It's really interesting for me! Right now I'm trying to "google" their variants...
The standard rigging with shrouds (not a free-standing) has a serious drawback - it is impossible to rotate the boom forward. Catamarans usually...
The principle is taken from the mechanism called "maltese cross drive" 1) After some angle the boom is fixed relative to the tripod. The angle...
There are no "inventions" in this post at all. Just a proposal. The kinematics when tacking (the motions of the sail and the motion of the crew...
Almost a spam – sorry for advertising my ideas. Once I have offered a strange concept of a fully-rotating rig. Nothing like this was ever built,...
That is what I'm talking about. Let's come back to the article http://www.publish.csiro.au/?act=view_file&file_id=PH560511.pdf where you made...
Thanks, Joakim!
Thanks! Sorry, Mikko: I was inatentive and somehow missed your comments. You have perfectly eхplained the situation and provided all the...
Re: "I don't have time to address and analyse the other examples and graphs you have added while I was replying, but I am pretty sure the result...
The logarithmic model has several parameters. If we assume that the parameters are time-dependant, we can somehow comply the data with logarithm...
Thanks! That's interesting!
Thanks! The heights are not typical for small yachts. Yes, logarithmical model is good for the mast ~ 200m high Have a look at pic....
I can not open the first pdf file - permanent error. Could you please copy the data from this file and post it? The second file looks like...
Actually, I was interested how does the "commonly accepted calculation method" ( i.e. "the logarithmic model") correspond to reality. According...
Re: wind gradient in speed and direction As far as I know, the wind gradient in typical conditions for a typical mast height is extremely small....
I'm not a naval architect, my opinion could be a mistake. According to the literature. 1) Designs with wings / winglets generally do not work...
Dear Richard Duo is a great design! http://www.sailingcatamarans.com/index.php/designs/1-beach-cats-and-dinghies-/420-duo-10ft-sailrow-dinghy I...
