International 10 Sq.m. Sailing Canoe
For over one hundred years racing sailing canoes has fascinated, exasperated, intrigued and even infuriated some of the world’s great sailors. The voyage includes the earliest known recorded planing boats, the second longest standing international sailing event, and the ability to go upwind like a stiletto through butter.
The key features of the Canoe are its relatively small but highly efficient rig, its long, slim and lightweight hull, and of course the sliding seat.
How do you sum up the appeal of the International 10 Square Metre Sailing Canoe in four short paragraphs? "The dry fly of sailing"? (Uffa Fox) "one of the most interesting things that God let man make"? ( L Francis Herreshof) "Oh [deleted]!"? (nearly everyone who’s ever sailed one)?
For well in excess of one hundred years racing sailing canoes has fascinated, exasperated, intrigued and even infuriated some of the world’s great sailors. Along the way decked canoes have provided the earliest known recorded planing boats, the second longest standing international sailing event, an enormous amount of idiosyncratic fun and the ability to go upwind like a stiletto through butter. Sailors who become smitten with the class’ unique challenge often stay sailing them for decades.
The key features of the Canoe are its relatively small but highly efficient rig, its long, slim and lightweight hull, and of course that sliding seat. The "plank" is key to the experience. There’s something very unique about sailing your boat from your perch some feet from the windward side, and while all is going well its a surprisingly relaxing experience. Physically its generally less demanding than a trapeze or wings, but it does bring some extra handling challenges.
No boat can be all things to all men, and its pointless to pretend that this is a mass market boat. But then Château d’Yquem is not a mass market wine, and a pre war blown Bentley is not a mass market car. Some special things are, well, just special, and, unlike the wine or the car, this one isn’t unreasonably expensive...
Latest Forum Posts
From jimc, Mon Dec 05, 2016 1:24 pm
> we could just start off with the info we have ourselves as a starter. What do you have?
I've made a few desultory attempts at gathering info from forum posts and the like, but I've never even got as far as draft documents, its just been too fragmented and frustrating. You'd think it would be possible to at least gather together some of the dialogues from the "How To" topic, but I've never been able to make anything gel even to the extent I thought it was worth hitting save. That's why there's a good deal of historical material on the International website and damn all how to. Its not because I like it that way, its because the historical material only needs me to gather it, but the other stuff require co-operation from people who are better sailors than me.
If folk want a go at a team effort I'll gladly set up topics or sections in the forum or make them sticky. I can do that in minutes.
But you know folks, its your class, your websites, why is it so difficult to get anything out of you?
From jimc, Mon Dec 05, 2016 11:47 am
SteveC wrote: I find that goose winging has it place if the wind is light and you need to go direct downwind but in the stronger winds above 10 knots you are far better going for better apparent wind over the sail and sailing on a closer reach where you get attached flow over the jib and main.
I've found that reverse attached flow (like a Laser main running by the lee) over a goose winged poled out jib on a deep reach seemed to be fast. This was with the jib poled out to weather of the forestay with the dangly pole. This ought to be even more effective with the club footed jibs. I was planning a wishbone version of the current favourite style jib boom in order to get good deck/jib sealing with foot round and a Finn/Solo style JC strap to keep the thing out to weather. I got the tubes, but been overtaken by events. My jib is a bit larger than the general run.
From SteveC, Mon Dec 05, 2016 11:06 am
To answer the original question, I think I've seen somewhere in Bethwaites book that the best performance is given by a jib which is between 27-30% of the total. This would actually imply our jibs should be larger at 2.8 to 3m. The trend seems to have gone to bigger jibs around 2.8m with the mast at 2.000-2100mm, it will be interesting to see how these work in practice.
There's a lot of confusing information but the general consensus is that a larger jib makes it easier to handle in a blow and should give benefit on a close reach and possibly upwind but downwind where its behind the main it could be worse. The theory is that the jib leach operates in a lower pressure zone in front of the mast so it becomes much more efficient. I saw a reference somewhere to the jib being 30% more efficient. From this it would seem sensible to make it as big as possible. However a bigger jib becomes harder to set as it interacts with the main so this needs to be adjusted more as the wind increases or the space between the main will become congested and the main will backwind and the jib will need to be twisted off to compensate.
Bigger might now be advantage on the IC as we are now using jib booms which do make the jib far more efficient downwind as it keeps the leach in shape and stops it bending away. Also goose winging on a dead run puts the jib sail area in a much better place. I find that goose winging has it place if the wind is light and you need to go direct downwind but in the stronger winds above 10 knots you are far better going for better apparent wind over the sail and sailing on a closer reach where you get attached flow over the jib and main.
With this in mind on the new M3 by mast is at 2090mm and I have a 2.8m jib. We'll see how it performs.
From SteveC, Mon Dec 05, 2016 10:06 am
... we could just start off with the info we have ourselves as a starter. What do you have?
From ScottKaczor, Sun Dec 04, 2016 4:39 pm
This is a good idea Jim but we could develop on that Idea and do it remotely by an internet based conference call/video.
If a small number of candidates were prepared to 'meet' to discuss a technical topic with the event taped and minutes turning into an article as suggested.
We should use technology to our advantage given the geographical spread of sailors and low frequency sailing or social events.
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Mayflower SC, Plymouth, UK
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Loch Lomond SC
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