Proa P52
Skip's proa with wing shown at the SailOK mess-about at Lake Eufala in 2014. Skip made me aware of the work done by Dr. Elkaim.
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| Skip's Proa |
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| Wing control details |
Wednesday, November 12, 2014
Current status as of Nov 11th 2014
Here is a picture of the P52 proa built by Skip as she is now outside my house in Coupeville, WA. She will be renamed, fixed (decks, sides, cockpit, etc.) The bow decks will be modified to hold the two wingsails that will be free-standing. Then a cleanup and paint - yellow of course! Lots of work ahead.
Skip's proa with wing shown at the SailOK mess-about at Lake Eufala in 2014. Skip made me aware of the work done by Dr. Elkaim.
Details of the control system on Skip's proa at SailOK 2014.
Skip's proa with wing shown at the SailOK mess-about at Lake Eufala in 2014. Skip made me aware of the work done by Dr. Elkaim.
Sunday, November 2, 2014
Dr. Gabriel Elkaim's dissertation
I need to give credit to Dr. Elkaim for his work on wing sails in a low Reynold's number environment.
His dissertation is titled, "System Identification for Precision Control of a Wingsailed GPS-guided catamaran", and was published in December 2001 at Stanford University in partial fulfillment of the requirements for the Degree of Doctor of Philosophy.
I found this paper to be of great help in my deliberations on the design of a wingsail system for use in a proa sailboat. Specifically the wing design and layout, with some modifications, are what I will be using on the proa.
There will be two wing systems, one on each bow. The control system, however, will be entirely mechanical so that the wings may be controlled by the skipper of the boat. As there are fundamental differences in the way a proa is sailed and the way a catamaran is sailed (shunting vs. tacking or gybing), the wings will be used with a different control system than the one designed and built by Dr. Elkaim. I will be detailing this control system once I have built it and worked out the bugs.
His dissertation is titled, "System Identification for Precision Control of a Wingsailed GPS-guided catamaran", and was published in December 2001 at Stanford University in partial fulfillment of the requirements for the Degree of Doctor of Philosophy.
I found this paper to be of great help in my deliberations on the design of a wingsail system for use in a proa sailboat. Specifically the wing design and layout, with some modifications, are what I will be using on the proa.
There will be two wing systems, one on each bow. The control system, however, will be entirely mechanical so that the wings may be controlled by the skipper of the boat. As there are fundamental differences in the way a proa is sailed and the way a catamaran is sailed (shunting vs. tacking or gybing), the wings will be used with a different control system than the one designed and built by Dr. Elkaim. I will be detailing this control system once I have built it and worked out the bugs.
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