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Reverse Spreaders |
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Rupert 
Really should get out more 
Joined: 11 Aug 04 Location: Whitefriars sc Online Status: Offline Posts: 8956 |
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 Topic: Reverse SpreadersPosted: 21 May 15 at 1:12pm |
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I've been thinking about it, but still can't figure out how this is caused by the mast being tin. Please explain!
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Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686
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sargesail
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Joined: 14 Jan 06 Location: United Kingdom Online Status: Offline Posts: 1459 |
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Posted: 21 May 15 at 1:22pm |
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Rupert - it's bait for troll feeders....
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davidyacht
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Joined: 29 Mar 05 Online Status: Offline Posts: 1345 |
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Posted: 21 May 15 at 2:12pm |
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I think that we can assume that the cause is not because the mast is tin, I had an Angel Carbon mast with swing spreaders which would readily invert if not restrained ... however I guess that a tim mast has a better chance of breaking as a consequence of the inversion.
Ref. Dynamics, don't propose breaking Rule 42, standing up may be seen by many as a step (literally) in this direction, however sitting static regardless of changes in wind speed and direction with an over kickered mainsail is definitely not fast.
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Happily living in the past
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Rupert
Really should get out more
Joined: 11 Aug 04 Location: Whitefriars sc Online Status: Offline Posts: 8956 |
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Posted: 21 May 15 at 2:21pm |
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To put this in RYA training terms what you are looking at is proper use of the 5 essentials!
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Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686
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Woodburner
Far too distracted from work 
Joined: 13 Mar 15 Location: Folkestone Kent Online Status: Offline Posts: 332 |
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Posted: 21 May 15 at 10:13pm |
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If and when you bend tin, it stays bent, carbon on the other hand returns to centre with quite amazing response, which was how racing windsurfer sails were able by using mis match luff curves to design both kicker and twist into the luff mismatch, down haul on the mast bends more than the slightly negative curve at the mast head so the sail twists off, down hall off, the curves align, the foot tensions the leech and closes the head of the sail. Dinghies still don't appear to have cottoned to its benign simplicity.
Carbon doesn't really need spreaders, you can even carry a kite without spreaders, carbon masts should by now be standard on all boats any boat that doesn't feature a carbon mast, particularly one built in the year 2006 is retarded no other word to describe it. It may be retarded because of price point constraints but retarded nonetheless.
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Rupert
Really should get out more
Joined: 11 Aug 04 Location: Whitefriars sc Online Status: Offline Posts: 8956 |
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Posted: 22 May 15 at 10:31am |
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Why do so many carbon masts have spreaders, then? Seems to me it is because more important than getting rid of spreaders are 2 things. Control of mast bend over a huge range of conditions using the same sail (something windyplanks never have to do) and reducing the size of the mast to reduce the turbulence over the sail.
Your final comment I have to agree with. A boat designed in 2006 really ought to have had a carbon mast from the off. |
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Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686
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Woodburner
Far too distracted from work
Joined: 13 Mar 15 Location: Folkestone Kent Online Status: Offline Posts: 332 |
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Posted: 22 May 15 at 11:30am |
That I would guess be because some of the silly buggers want the carbon to emulate the sh*t performance of their tin rigs so they don't upset the class, a la Blaze. (Or they are trying to use the same sail and luff curve.)
The EPS mast is stiff, doesn't have spreaders and supports a 9.4 sail very adequately. The D 1 supports a big sail and a kite, it's just because the whole dinghy market & mindset is so screwed up. Produce a decent product that's modern and if the class don't bugger you the PYAG will, so it self perpetuates the crap you have to sail. Then you all recommend the same crap you are sailing to all the newcomers, come what may, not thinking that some people would actually pay for better quality a) if they knew it existed, b)they could try it first and c) some lame arse committee wasn't going to use restrictive practises to prevent its market uptake.
Edited by Woodburner - 22 May 15 at 11:44am |
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sargesail
Really should get out more
Joined: 14 Jan 06 Location: United Kingdom Online Status: Offline Posts: 1459 |
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Posted: 22 May 15 at 11:39am |
DULL JUST DULL!
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