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EntriesRig Options - GibbonsPosted: 03/03/05 |
Proas
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The story of this rig starts in Hawaii, with Euell - “Have you ever eaten a pine tree?” - Gibbons, a half century ago. Now, thanks to a renewed interest in proas and the easy flow of information on the Internet, the rig has received some new attention, and looks to become a very good proa rig indeed. Writer and naturalist Euell Gibbons was living in Hawaii and dining on the jungle flora and fauna in the 1950's. He soon realized that "an island is a small body of land surrounded by the need for a boat", so he set out to build himself one. Euell had been a professional boatbuilder, so he knew something of what he was about.
Rig Options - BalestronPosted: 03/03/05 |
Proas
The Art of Balance Of all the Western rigs that have been tried on proas, the balestron rig (also known as the Aerorig®, balanced rig, swing rig, and EasyRig®) has the most promise. This rig has been around for decades, and is slowly making inroads into the notoriously conservative yachting establishment.
Whatever the rig's advantages for tacking craft, they pale in comparison to what it can do for proas; it makes shunting as simple and stress-free as tacking your Hunter 32 around the bay. This rig makes single-handing a big proa a reality, and opens the door for proas to become a serious alternative for the cruising sailor. Rig Options - SloopPosted: 03/03/05 |
Proas
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The sloop is the rig of choice on 90% of sailboats. Why not on proas as well? Here’s why. Rigging a proa as a sloop is a true blending of East and West. The proa is considered the pinnacle of Pacific canoe design, and the sloop is often considered the finest invention of Western "yachting". Brilliant in their own context, what happens when we creatively recombine their DNA?First consider the sloop. Beautiful, efficient, and handy, the sloop has been the darling of the yachting world for going on one hundred years. Refined over the years, and lavished with the latest hi-tech materials, the rig is versatile enough to please all-out racers and laid-back cruisers. When set up with a self-tending jib, the rig is simplicity itself to tack, needing only a gentle hand on the tiller to guide the boat through stays. When rigged as a racer, there are enough sails to change, winches to grind and strings to tweak to keep a large crew very busy. The rig works for small day sailors all the way up to 100' mega-yachts. Rig Options - SchoonerPosted: 03/02/05 |
Proas
Cheers, perhaps the most famous Western proa, was schooner rigged. Since she was so successful, you might think that her rig had something to do with it, and you’d be right.
Though the schooner has several good points, the most important one as far as proas are concerned is the ability to vary the fore and aft CE (center of effort) by trimming the sails. This ability cannot be overstated enough, in my opinion. Proas are, by their nature, "rudder-challenged". That is, the necessity of shunting makes operating a rudder a problem. You may think that I am talking about the problem of shifting the rudder from one end to the other during each shunt. Though this is an issue, twin rudders, perhaps counter-rotating, at each end of the hull, can handily solve this problem. No, the bigger problem is that a proa must come to a complete and dead stop for each and every shunt.
As any sailor knows, allowing a sailboat to come to a stop is allowing it to get out of control, because with no water flowing past, the rudder is rendered useless. All Western craft are fundamentally designed with the unspoken assumption that the craft is NEVER to come to a complete halt while sailing. When this does unintentionally occur, the boat is said to be "caught in irons" - a colorful expression that illustrates the Western sailor's dread of the situation. The Case for the Steering OarPosted: 03/02/05 |
Contributions
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By Gary Dierking Steering is one of the great challenges of proa design. The one who finally designs a steering system that a) shunts easily, b) controls the canoe both while at speed and while stationary during a shunt, c) is hydrodynamically efficient, d) is immune to underwater hazards, and e) is simple and foolproof, will have discovered the proa “holy grail”. Could it be that the Pacific Islanders have already invented such a wondrous device? My first experience with a steering oar was not auspicious. In Coast Guard boot camp I managed to talk my way into steering one of the big whaleboats used for training and racing. We must have had all the strong guys on one side as my best effort was not enough to prevent ramming one of the other boats; causing an automatic disqualification and my demotion to rowing guy. It took quite a few years before I realized that a steering oar is much more than a rudder. If I had used the oar function I could have avoided the collision.
The Zen of ProaPosted: 03/01/05 |
Contributions
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By John Dalziel Testing With Models - IIPosted: 03/01/05 |
Proas
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From the Proafile Archives. Originally posted 1999 After my exciting but ultimately unsatisfying flirtation with anti-heeling Bruce foils for my proa scale model, I went out and bought my first computer. We all know what a huge time sink that is, so the proa and any model testing pertaining to it went onto a very remote back burner. This turned out to be perfect timing, since once I discovered the internet, I gradually found other people who were also interested in proa design and development. (All three of us!)
Testing With Models - IPosted: 03/01/05 |
Proas
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From the Proafile Archives. Originally posted 1999 After the disastrous first sail of my 26’ proa Rozinante, and after waiting a suitable time for my emotional wounds to heal, I decided I needed to do some research and testing. Research was easy, since there is practically nothing out there to read on proa design. One notable exception is the Amateur Yacht Research Society (AYRS) which has published many a paper about proas over the years, and is one of the few yacht design organizations that treats proas as a legitimate area of interest. I became a member post haste.
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ResourcesKat & ProaWakataitea Tiki 46 Apacolypso Designs Siam Sailing Roxane and Romilly Tom Speer’s Shunting Foil Sections Boat Bits Lunada Design Tacking Outrigger Seventy Point Eight Percent Arpex Inigo Wijnen Slider Cat Chine Blog Amateur Boatbuilding Out Your Back Door Outrigger Sailing Canoes Sailing Anarchy Canoes of Oceania Never Sea Land A Tiki in Thailand Canoe Sailing Magazine Wikiproa K-Proa Triloboats Cheap Pages James Francis Boats Proa Web Sites Peak Energy Balogh Sail Designs Hydrovisions Cape Falcon Kayak Multi Marine L-7 Crab Claw Catamaran Mehrrumpfboote Openboat Oar Club John Welsford Small Craft Design Global Rich List Skinboat School OCPaddler.com Jubilee USA Network Zephyr Kayak Sails Chesapeake Light Craft Nigel Irens Design Tarawa, a Proa For One Polynesian Voyaging Society McGowan Marine Design RealClimate - Climate Science Small Sailboats UK |