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Technical protest

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fudheid View Drop Down
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Post Options Post Options   Quote fudheid Quote  Post ReplyReply Direct Link To This Post Posted: 19 Nov 19 at 8:10pm
Put simply, the question still remains.... To me the fence is a contrivance?
So the rules state:
Daggerboards, bilgeboards, double rudders, winged rudders and similar contrivances are prohibited.

Is the fence a similar contrivance?
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423zero View Drop Down
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Post Options Post Options   Quote 423zero Quote  Post ReplyReply Direct Link To This Post Posted: 19 Nov 19 at 8:59pm
Obviously it's added to blade, so it's a contrivance. You can't buy a Merlin rudder with a fence.
Robert
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Post Options Post Options   Quote gbrspratt Quote  Post ReplyReply Direct Link To This Post Posted: 19 Nov 19 at 9:04pm
Originally posted by 423zero

Obviously it's added to blade, so it's a contrivance. You can't buy a Merlin rudder with a fence.


They come like that from one of the manufacturers if you want it.
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423zero View Drop Down
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Post Options Post Options   Quote 423zero Quote  Post ReplyReply Direct Link To This Post Posted: 19 Nov 19 at 9:10pm
Rockatross, don't think it's class legal, so it's a blade you can buy that will fit a Merlin stock.
Robert
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Post Options Post Options   Quote Rupert Quote  Post ReplyReply Direct Link To This Post Posted: 19 Nov 19 at 9:14pm
Surely it is whatever the class choose it to be? If they, as owners, decide to allow fences, or rather, to not disallow them, then they are obviously not "similar contrivences" or whatever the phrase was. Haven't they been using them for years?
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gbrspratt View Drop Down
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Post Options Post Options   Quote gbrspratt Quote  Post ReplyReply Direct Link To This Post Posted: 19 Nov 19 at 9:27pm
Originally posted by 423zero

Rockatross, don't think it's class legal, so it's a blade you can buy that will fit a Merlin stock.


Rockatross is legal and racing. These are Winder Merlin rudders if you really want to know .
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Post Options Post Options   Quote gbrspratt Quote  Post ReplyReply Direct Link To This Post Posted: 19 Nov 19 at 9:33pm
Originally posted by Rupert

Surely it is whatever the class choose it to be? If they, as owners, decide to allow fences, or rather, to not disallow them, then they are obviously not "similar contrivences" or whatever the phrase was. Haven't they been using them for years?


I think what's happened is it wasn't noticed that they may or may not be in breach of this rule. And now it's been brought to everyone's attention. But no-one is clear on why it is or isn't legal. Grandfathering the ones out there has been suggested. But not enough people can agree on an answer.

It's really interesting hearing non class sailors opinions
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423zero View Drop Down
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Post Options Post Options   Quote 423zero Quote  Post ReplyReply Direct Link To This Post Posted: 19 Nov 19 at 9:42pm
I know one thing this is the type of dealing that winds iGRF up
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davidyacht View Drop Down
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Post Options Post Options   Quote davidyacht Quote  Post ReplyReply Direct Link To This Post Posted: 19 Nov 19 at 10:30pm
Surely a fence is to improve foil efficiency by reducing ventilation and hence increasing the effective span, whereas wings generate vertical lift and energy recovery from the stern wave.   

I can see why a class might want to outlaw winged rudders, since the cost can be disproportionate and may limit how and where a boat may be sailed, a very different problem to tinkering around with fences.  But in the end it is for the Merlins to decide if this is a worthwhile avenue to pursue.   

Bear in mind that they are a restricted class and not a development class, and they have done a pretty good job in managing evolution not revolution.
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JimC View Drop Down
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Post Options Post Options   Quote JimC Quote  Post ReplyReply Direct Link To This Post Posted: 19 Nov 19 at 11:13pm
Originally posted by gbrspratt

I think what's happened is it wasn't noticed that they may or may not be in breach of this rule.

"Similar contrivances" is not the smartest bit of rule writing I've ever seen, but grief, you people are making a mountain out of a molehill, hell, not even as big as a molehill. A blade fence is an utterly different thing to a lifting foil. I am to say the least not biased towards the Merlin class, but I don't think the distinction presents the slightest problem.
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