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| The rig seen on many canoes both large and small by early visitors to Tahiti and the nearby islands was an extraordinarily high aspect rig not seen elsewhere in Oceania. A curved spar runs along the aft edge of the sail. |
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| Even offshore voyaging canoes used this rig. Cook's expedition was astonished by its windward ability. It did however have drawbacks in that it appears the whole rig would need to be raised and lowered like a windsurfer and I have no idea how it could be reefed. |
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| My first experiment with this rig had it installed on one of my Ulua outriggers. I eliminated the spar on the aft edge and supported the upper section with fiberglass rod battens that fitted into curved pockets. Predictably it went well to weather and looked very cool. |
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| Later I built a slightly different version for a 27' Tipairua double canoe. Rather than using the curved battens which were difficult to furl after lowering the sail, I used a gunter arrangement to support the upper section. This has been successfully in use for the past eighteen years. |
What an interesting rig! I love the way it looks. It appears the gunter style rig can be reefed?
ReplyDeleteYes it can be reefed.
DeleteWith the wide staying base of the deck outriggers on the original Tahitian designs, in stronger winds the crew would be able to stall the rig by easing sheets yet the sails (actually early wings) would not flap or distort nor foul the spread apart stays. Running off in high winds and seas would be more difficult however, maybe the crew sheeted sails amidships, stalled them with the supported leeches facing the astern wind? The helm would have to be accurate in keeping dead downwind course?
Delete> Running off in high winds and seas would be more difficult however, maybe the crew sheeted sails amidships, stalled them with the supported leeches facing the astern wind? The helm would have to be accurate in keeping dead downwind course?
Deletemaybe it's not so hard. I recall in "icebird" David Lewis sails a steel monohull to Australia->Antarctica->South Africa and at one point his storm technique is a storm jib sheeted hard amidships. So running with the wind if it takes the wind either side it blows the bow straight down wind. On the schooner pictured if you handled heavy weather by dropping the mizzen and sheeting the forward one hard into the center that might work. Although just dropping both seems a little more likely to me.
I've loved that 27 footer ever since seeing it in a photo in Tim Anderson's "Ulua trip" blog.
ReplyDeleteIf that sail was double thickness (two identical sheets), hinged at the mast like butterfly wings (or a 'hinge' :-)), the closed position (as pictured) would be great into the wind, but opened out, would work similar to 'goosewinging' downwind? That would solve the downwind course stability problem I should think, plus look pretty impressive! Just a thought.
ReplyDeleteWhat you are describing is a rig that came out in the 1930's called the Ljungstrom rig.
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