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Devotti Single Hander

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    Posted: 21 Nov 09 at 8:04pm

I think this picture shows what I mean GRF.

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Phil eltringham View Drop Down
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Post Options Post Options   Quote Phil eltringham Quote  Post ReplyReply Direct Link To This Post Posted: 21 Nov 09 at 8:07pm

Perhaps I should listen to my own advise more often too, however it does not lessen the truth of the saying: Better to remain silent and be thought a fool than to speak and remove all doubt

Nice pics, one small question, what is with the extra mast above the main head? I doubt its not hoisted all the way up so why so much spare height?



Edited by Phil eltringham
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Post Options Post Options   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 21 Nov 09 at 8:14pm

Hi Phil,

There is a cleat at the top of the mast to lock the metal halyard wire in place, much like a Taser.

The top of the mast is sealed so that it floats when capsized and does not turn the boat upside down.

The mainsail is hoisted fully, it just looks like it's dropped.

Tim

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Post Options Post Options   Quote G.R.F. Quote  Post ReplyReply Direct Link To This Post Posted: 21 Nov 09 at 8:21pm
Originally posted by timg

(sigh)....


The reason why the mast bends like that is to cope with the huge
mainsail.
If you're gonna have a big main and the wind gets up you need it to
spill off.

You (GRF) will find this out when you sail your 100, if / when you get
it.
With the stays you will find more support, but then that's why you will
have less mainsail area to worry about.
The beauty of this main and mast is that you can use the power, right
up to the moment that you need to start loosing it, as opposed to having
a finite power that you could probably do with having more of, in certain
conditions.
So the next good thing about it....which to be fair, being a windsurfer
you are going to have to start learning.... is the shape of the mainsail
compared to the kite, it's very important to get the slot right (the gap
between the mainsail and the kite).
If you look carefully you will see that when the mast bends like that
(cos it was made in bendy street arizona) you get the mainsail taking the
same shape as the kite, hence creating the best lift out of both sails.
And there you have it....simple.
Looks different, but you know what??? It really works.




Sighs? Ha I guess I should forgive you being just a dingy sailor stuck in
the time warp.

Here's the news from Planet Unstayed rig where we hold up 12 mtr sails
with our bare hands..

The sail gets cut to deal with it RATHER THAN have a cheap bendy
liquorice stick.

So the mast bends off so you have to put up another sail then is that the
logic? doh. Kind of plays to Mike Lyons HALO logic doesn't it, like what's
the point?

Edited by G.R.F.
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Post Options Post Options   Quote Phil eltringham Quote  Post ReplyReply Direct Link To This Post Posted: 21 Nov 09 at 8:22pm
I figured it would be something like that, just caught me out at how much there was, makes sense now.  The sealed mast is a good move, especially on a single hander, it just makes life the little bit easier.  I guess the trade off is not having the option to only replace half the mast if you break it - swings and roundabouts.  The rig looks really good, although I think if it had been me in there I'd have been a bit more conservative and had the main sheeted in a touch more
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Post Options Post Options   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 21 Nov 09 at 8:27pm
Not sure how GRF still can't grasp the concept of a carbon mast that
bends off to deposed.

The actual odd Bit about this rig is the inversion, but if it works...it
works :-)
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Post Options Post Options   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 21 Nov 09 at 8:30pm

Originally posted by Phil eltringham

I figured it would be something like that, just caught me out at how much there was, makes sense now.  The sealed mast is a good move, especially on a single hander, it just makes life the little bit easier.  I guess the trade off is not having the option to only replace half the mast if you break it - swings and roundabouts.  The rig looks really good, although I think if it had been me in there I'd have been a bit more conservative and had the main sheeted in a touch more

Well you are correct about that, however I had approx 10 mins previous to the piccy just been punished for having too much mainsheet on, so I let it off a bit more than I should have.....practice makes perfect.

check out the piccy of the sealed mast working properly....i am 89kgs on the board.

Tim

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Post Options Post Options   Quote Phil eltringham Quote  Post ReplyReply Direct Link To This Post Posted: 21 Nov 09 at 8:31pm
Grumpfh I think your handicap here in understanding what is going on is because you come from a windsurfing background and have never had to consider segmented wing theory, as you have only ever had to deal with a single lifting surface at a time.  Both sails have an effect on eachother.  I am not going to recite chapter and verse on it here.  I will however suggest you read one of two books: Elements of Yacht Design by Norman L. Skene, and The Symmetry of Sailing by Ross Garrett, neither of which is a text book by any streach, and are simply interesting reads.  Both explain the basic theory in laymans terms.  I can lend you both of these, and hopefully you'll come back and understand what you are missing which has lead you to your mistake. 
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Post Options Post Options   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 21 Nov 09 at 8:31pm
Grf, you might like to glance at the mast foot of your tea tray, it's a
pivot, unlike the fixed one in your alto. Different rig, different
requirement.
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Post Options Post Options   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 21 Nov 09 at 8:35pm

The point is when the wind gets up and down you windsurfers have to keep going out to buy more sails.

This is a one design boat, just like the Halo and others that try to take ALL things into consideration, not expect you to go out and buy new equipment to cope with the conditions.

get it??

Nahh probably not.

 

Originally posted by G.R.F.

Originally posted by timg

(sigh)....


The reason why the mast bends like that is to cope with the huge
mainsail.
If you're gonna have a big main and the wind gets up you need it to
spill off.

You (GRF) will find this out when you sail your 100, if / when you get
it.
With the stays you will find more support, but then that's why you will
have less mainsail area to worry about.
The beauty of this main and mast is that you can use the power, right
up to the moment that you need to start loosing it, as opposed to having
a finite power that you could probably do with having more of, in certain
conditions.
So the next good thing about it....which to be fair, being a windsurfer
you are going to have to start learning.... is the shape of the mainsail
compared to the kite, it's very important to get the slot right (the gap
between the mainsail and the kite).
If you look carefully you will see that when the mast bends like that
(cos it was made in bendy street arizona) you get the mainsail taking the
same shape as the kite, hence creating the best lift out of both sails.
And there you have it....simple.
Looks different, but you know what??? It really works.




Sighs? Ha I guess I should forgive you being just a dingy sailor stuck in
the time warp.

Here's the news from Planet Unstayed rig where we hold up 12 mtr sails
with our bare hands..

The sail gets cut to deal with it RATHER THAN have a cheap bendy
liquorice stick.

So the mast bends off so you have to put up another sail then is that the
logic? doh. Kind of plays to Mike Lyons HALO logic doesn't it, like what's
the point?
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