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Sam.Spoons View Drop Down
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    Posted: 15 Mar 18 at 11:25pm
I used to sail an OK in my teens, now I sail a Blaze. I've just got to thinking about the way the cockpits are laid out in older boats compare to more recent designs.

The OK and Solo for example have an area limited, usually by the mainsheet traveller/thwart, that keeps the helm in the aft part of the boat (no further forward than the widest mid section and behind the centreboard).

I think that is because older boats have more rocker than more recent designs and, maybe, don't need weight as far forwards to keep the transom out of the water in the light stuff (and nobody can argue that a Solo is slow in the light.....). In the Blaze it definitely pays off to sit next to the mast in a drifter (and I seem to remember sitting on the foredeck facing backwards in the OK but that's nowhere near as far forward as in the Blaze).....


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zeon View Drop Down
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Post Options Post Options   Quote zeon Quote  Post ReplyReply Direct Link To This Post Posted: 16 Mar 18 at 12:27am
.

Edited by zeon - 16 Mar 18 at 8:35am
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Pierre View Drop Down
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Post Options Post Options   Quote Pierre Quote  Post ReplyReply Direct Link To This Post Posted: 16 Mar 18 at 8:04am
.....

Edited by Pierre - 16 Mar 18 at 9:30am
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Post Options Post Options   Quote Rupert Quote  Post ReplyReply Direct Link To This Post Posted: 16 Mar 18 at 8:22am
Rocker and deadrise. But is the cockpit then designed like that to allow movement, or is it simply that a double bottom means you don't need decks, thwarts or other bouyancy tanks?
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Sam.Spoons View Drop Down
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Post Options Post Options   Quote Sam.Spoons Quote  Post ReplyReply Direct Link To This Post Posted: 16 Mar 18 at 9:18am
Skiffy boats aren't designed with light winds in mind so I suspect the latter but we take advantage of the space in a drifter, obviously it's irrelevant once you are sitting out. 

Edited by Sam.Spoons - 16 Mar 18 at 9:20am
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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: 16 Mar 18 at 9:35am
You also need to consider structural requirements. The thwart across the middle of an old style plywood boat tends to be a major structural member supporting the centreboard case and the sides. Without that support a boat would bend in all sorts of undesirable ways. A double bottom boat, especially one with bulkheads under the false floor, is much stronger.
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Post Options Post Options   Quote Sam.Spoons Quote  Post ReplyReply Direct Link To This Post Posted: 16 Mar 18 at 3:53pm
Yes understood. My curiosity was regarding the need/effectiveness of sitting forward in the light stuff. The supposition being that old boats had more rocker and deadrise you don't need to sit as far forward to avoid dragging the transom. 
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Post Options Post Options   Quote turnturtle Quote  Post ReplyReply Direct Link To This Post Posted: 16 Mar 18 at 4:38pm
Hate to break it to you ... but your one just has a really fat arse.
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Post Options Post Options   Quote Sam.Spoons Quote  Post ReplyReply Direct Link To This Post Posted: 16 Mar 18 at 4:43pm
Embarrassed
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Post Options Post Options   Quote JimC Quote  Post ReplyReply Direct Link To This Post Posted: 16 Mar 18 at 5:05pm
very easy to over simplify... As a very sweeping generalisation older style boats have the mast much further forward, fuller bows and more rocker, which means that the cockpit is more amidships and more movement is required to make the same trim change.
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