Entries | Proas

June Launchings

After an extensive refit (that included sawing the hull in half and adding a few feet), Harmen Hielkema's Toroa is back in his element, testing a new crab claw rig. Toroa steers by weight shift and adjusting the immersion of two daggerboards. Read more at Canoes of Oceania.




Gaia's Dream. Only one year after construction began, a 70' modern Pacific proa has been successfully launched in NSW Australia. The innovative variable geometry rig should be in place in August, according to the builder, Inigo Wijnen. See more at Inigo's site.



---

Proas by James Brett

Marine Designer James Brett of Auckland, New Zealand has updated his day sailing proa with a new polytarp junk rig. He reports the 16 footer with modern, high aspect junk rig can match a Laser in upwind pointing angle and has serious power downwind. James has also completed a design for a 16m cruising proa while at Massey University, and has built a sweet 1m R/C proa that shunts on a dime.

The model has demonstrated self-righting ability via a streamlined lee pod, and also uses twin counter-rotating ogive section foils for steering and lateral plane. Ogive section foils are symmetrical fore and aft, so ideally suited to a proa.

The rudders are very interesting, because ogive proa rudders usually have the shafts running through the center of the rudder, which cause the foil to be "over-balanced". The fact that the rudders are joined and counter-rotate may ameliorate this tendency, delivering a null total result, and I'd like to hear opinions on that, anyone? In any case, at the scale of this model proa, the effect is easily overcome by the servo motor, and the proa shunts more quickly than any I have seen. As I said... sweet.

Sailrocketry

"To one who has turned lifeless materials into a thing alive and forced it to do his bidding against the resisting forces of nature in silence, without fuel and without defiling air or water, there can never be anything more wonderful than the sailboat. "The sailboat never offends the senses of fish, fowl or man. To make it move faster is to make it more a thing of freedom and beauty."
--Bernard Smith, "The 40-Knot Sailboat," 1963

When I was a kid, I read 'The 40-knot Sailboat' by Bernard Smith, who introduced me to proas and sailing hydrofoils and all kinds of amazing ideas about boats that fired my imagination in the same way that race cars or starships fire others. Flying over water, using only the power of the wind... it seemed like magic. Magic that might actually work...

I even made a balsa wood model of an aerohydrofoil when I was fourteen, which didn't go anywhere at all, let alone fly. Discouraged, I soon turned my attention to baseball, but fortunately, others kept at it. Paul Larsen is behind the Vestas Sailrocket speed sailing proa - a project inspired by Bernard Smith.

Vestas Sailrocket averaged 47.36 knots (nearly 55 mph) over a 500-meter course on Dec. 3, and it just goes to show that practice makes perfect. It's a brilliant name, since Bernard Smith was a rocket scientist.

"I am now safe in the knowledge that no one can dispute that this is a very viable concept of enormous potential. In fact, I think it is perhaps one of the most significant speed sailing craft of all time. The concept behind this craft is future proof." --Paul Larsen

Rozinante II

A considerable amount of credit/blame for my love of small boats goes to L. Francis Herreshoff and his book 'The Compleat Cruiser'. I fell in love with his ideas about a simple yet refined cruising lifestyle, epitomized by Mr. Weldon and his whaleboat type ketch - Rozinante. Rozinante is beautiful, fast, seaworthy and handy, and I was musing recently about how a proa version of Rozinante might work out.

Rozinante Il is a mono-proa - a bilaterally asymmetric monohull. Her dimensions, style and intent are all within the ballpark of the original. She's the Rozinante from the alternative proa-centered universe.



LOA: 28' | LWL: 25' | BOA: 6'-10" | Draft: 2'-10" | SA: 285 sq. ft.

She's a lugsail schooner, which gives us a well-balanced rig that is easily handled, reefed and shunted, and the character is in keeping with the small gaffs of the original ketch. The cockpit is 8' long and deep enough for comfortable seating, yet the floor is above the waterline which allows it to be self bailing (unlike the original). Also unlike the original, Rozy II does not have a weighted keel and her draft is 8" less, though the keel is still sharp and deep for good windward ability. Rozy II's ballast is in the form of a water ballast tank to windward, beneath the cockpit seat.



Rozinante II's most startling feature is the pronounced hull asymmetry. It looks daft, but there's good reason for it. A traditional monohull's waterplane becomes more asymmetrical the more it heels, with the lee side bulging out, creating wave drag and a weather helm, usually counteracted by a large rudder (creating more drag). Rozy II follows the Micronesian practice of keeping the "flat" side to leeward, which creates a leeward turning force (and balancing the windward turning force of the schooner rig). The flatter lines create less drag, and best of all, the waterplane shape becomes increasingly symmetrical as the boat heels, not less. Heeled to 14 degrees, the yacht's waterline beam shrinks from 53" to 44", yielding a 7.6:1 Length:Beam ratio. I expect considerably better speed from this finer and much lighter Rozinante when compared to the original.



Accommodations are spartan below, as was the original. A single berth with sitting headroom and storage locker in one end, and an enclosed head in the other. Though L. Francis would prefer a cedar bucket, I'm including a marine toilet and holding tank as a concession to modernity. The galley box is in the cockpit, running the length of the leeward side.

Rozy II is steered via trimming the sheets and adjusting the two centerplate "trim tabs". In this, she follows the practice of Yakaboo, the record breaking sailing canoe of Frederick "Fritz" Fenger. She won't be "multihull" fast, but I think she'd make for a fun and rewarding boat to sail, and the looks she would get at the dock would be absolutely priceless.

Note: This is a sketch, a cartoon only. No plans are available.

Proas Through the Ages

My buddy Lee picked up this ancient artifact for me recently: How to Build 20 BOATS, a Fawcett 50 cent publication from 1943. It's reprinted material from Mechanix Illustrated, and it happens to include the PLYWOOD PROA by Hi Sibley. Aside from the historical value (nearly equivalent to King Tut's Tomb) I find it interesting that:

1. In all the years since then, plywood is still the preferred construction material for amateur boat construction. You'd think we'd be using Unobtainium by now.

2. The usual story about the growth of the multihull "movement" in the U.S. is that WWII servicemen returned from duty in the South Pacific where they had witnessed outriggers first hand, and then proceeded to create modern versions such as Woody Brown's Manu Kai. Does this article confirm that story, or does it imply an earlier origin?

3. The cover photo. I can't help but be drawn to this woman and her enigmatic grin. Like Mona Lisa, I keep imagining the real reason for that smile...



Remainder of proa article after the jump.

continued...

Equilibre

Jeremy Fischer designed, built and sails his 40' proa Equilibre out of Martinique. Everything about this boat is virtually perfect: the strong Micronesian heritage, the huge crab claw sail, the time and cost sensitive construction/fit-out, even the color (probably the result of the can being on clearance at the local chandlery). Equilibre helps me think about balance, not only with wind and tide, but with the environment (economic and natural), with my fellow man, and maybe most of all, with my spirit.

The Wizard of Oz

The proa designs of Australian designer J. S. Taylor have been the subject of many an interesting discussion on the proa_file list over the years. Taylor, an East European immigrant to Oz in the 50’s, had several of his provocative articles published in the yachting press of the day, both locally and internationally. Taylor was one of the first to advocate the proa as a serious yachting alternative, and his imperious tone combined with a superb drawing and drafting style soon made him an editor’s favorite.

This was in the 1960’s, the era of the Jetsons and all things futuristic. Multihulls were an amazing new invention, with visionaries predicting ocean passages in motorboat-like speed and comfort, and marinas filled with nothing but multihull yachts, most of them with tailfins. Taylor managed to combine this love of progress with a grounding in Polynesian tradition, and it is the combination of the two that I find endlessly fascinating. Taylor drew boats that combined crab claw sails with solid airfoil wings, tall ceremonial stems with streamlined bubble canopies, outriggers with hydrofoils! He was doing his own version of steampunk, 40 years ahead of his time. Bamboopunk?

In his articles, Taylor presented his proas as if they were done and done, a matter of public record. Yet the record is mute. There ARE no photographs of Taylor’s proas, and one would think that vehicles of such spectacular design and performance might have inspired at least one snapshot. Truth is, Taylor was a sham - though a glorious one. The multihull movement is full of them - all promising their versions of the holy grail.

Taylor was misemployed. He thought he was a yacht designer, but he was really an imagineer; a translator and synthesizer of myths both modern and ancient. An artist who thought he was an engineer, a shaman trapped in the body of a yacht designer. It’s important to know which one you are, because an artist’s creations aren’t expected to actually float. I guess I’ve always had a hard time defining that line myself - IMHO the best art actually floats, and the best boats are art - in every sense of the word.

More J. S. Taylor pics after the jump.

continued...

The Spinnaclaw

The boys in the lab have been working overtime on a new invention, and I wanted to give you a sneak peak. Internally we call it the spinnaclaw, however marketing is still testing the final brand name with focus groups.

As the name implies, it is a cross between a crab claw sail and a spinnaker, sort of a Scandinavian/Polynesian hybrid. The idea is to mount the crab claw boom to a spinnaker pole, and shunt the sail like a big asymmetrical chute! The reasons you would do that:

• Quicker shunts. The radial motion of the spinnaker pole combined with the fact that it travels only half as far as the traditional rig fore and aft should make for snappier shunts.
• Better helm balance off wind: traditional crab claws develop powerful weather helm on off wind courses, the result of all that sail hanging off the leeward side. The Spinnaclaw shifts approx. 20% of the sail area to windward as it bears off, thus reducing weather helm.
• Quickly adjustable CE. The pole can easily be shifted fore and aft while under sail, fine tuning the sail's center of effort and helm balance for all courses. A nice feature for a boat that steers by weight shift and the occasional steering oar.

I want to apologize for the lack of posts recently, it's been a busy month. Click here if you must see what takes me away from boat blogging.

Interesting Proajects

Some interesting proa builds:

Gaia's Dream: Gaia seems to be the matron deity of multihulls. Inigo Wijnen has built three boats all named after the Earth Mother, and James Wharram sails the famous Spirit of Gaia. Inigo's latest incarnation of Gaia will be a 71' shunting Pacific proa designed to carry up to 12 people or 9 tons of cargo, for expedition work.

GAIA’S DREAM does not use any fossil fuels in her normal use. She runs totally on alternative energy sources, sun, wind, bio fuel and ethanol. She can be used in a passenger mode or cargo mode or a mix of both.

Magpie: John Sullivan documents his non-traditonal build (check out the solar steam bending!) of a traditional Micronesian sailing canoe. Projected launch is late August... about now!

Greenbird: This land speed record contender is a proa! Echoing the "one-way proa" configuration of Crossbow, Richard Jenkins' carbon fiber land yacht is down under on Lake Lefroy looking to break the 116.7 mph land sail record currently held by Bob Schumacher in Iron Duck. Greenbird employs "aerodynamic ballast" (downforce) with its single airfoil-shaped crossbeam, a concept proposed by Australian proa designer J. S. Taylor in the 1960's. Article at WIRED.

Three CHEERS

The French love all things historical and nautical, so it makes perfect sense that they have become the curators of the first Atlantic proa in the world: the “giant killer” CHEERS. Today, he is kept in Port Saint Louis by Vincent Besin and the French government, which has declared him a "monument historique", one of less than 100 small craft, and the only multihull. CHEERS was relaunched last week, at a ceremony which included his barefoot designer, Dick Newick.

40 years ago, CHEERS arrived third in the 1968 Observer Single-Handed Transatlantic Race, beaten by only two monohulls, the 56’ Sir Thomas Lipton and the 50’ Voortrekker. It was a bellwether moment for multihulls, yet ironically, the proa has been virtually ignored in what became the Great Multihull Takeover, with greyhound trimarans dominating the race course and charter cat galleons dominating the “gold run”.

CHEERS was the inspired production of three men: the designer Richard C. Newick, called the “Wizard of Maine”; the sailor Tom Follett; and the financier, Jim Morris. The Dreamer, the Doer, and the Patron - a frequently successful trinity.

The French interest in such a uniquely “American” enterprise is not without precedent, consider the Statue of Liberty. Vincent Besin, you are a keeper of the flame, and for that, I salute you!

"I notice that you are taking steps to enable the crew to right the vessel when it has capsized, but my committee are more interested in any steps you may take to stop the capsizing in the first place. We are still of the opinion that to race along at 25 knots in between periodically capsizing is not a proper way to cross the Atlantic..."

--Race Committee letter, October, 1967: Royal Western Yacht Club of England

Page 1 of 4 pages  1 2 3 >  Last »