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Block Arrangements for shrouds

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alstorer View Drop Down
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    Posted: 17 Jan 12 at 11:17am
Originally posted by G.R.F.

Originally posted by JimC


GRF, you'll just have to face it, you are becoming a dinghy sailor.
  Confused

Nope,
I'd say you've got the bug pretty badly. Before you know it the weight of blocks and lines will be almost as much as the weight of the boat itself. Peer into a Merlin, 5o5 etc at the dinghy show to see where your future lies.
(interestingly, there's an odd level of crossover in people between the stringtastic merlins and the "clean" B14, showing that stringitis is not entirely debilitating but can be contaiguous).
-_
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Post Options Post Options   Quote JohnW Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jan 12 at 11:20am
Originally posted by getafix

Originally posted by JohnW

As You have had ideas from the Merlins, I thought I would throw in the arrangement that I have on my Albacore, (you know you love them!  Tongue)

I have a single string that adjusts the jib halyard and both shrouds together to control rake, as well as the option to adjust each individually:





Blocks with black centres are fixed, others are running.  The first stage of each cascade (at least) need to to be high tension blocks for example the ones on this page:

To do the single string rake control, you need to know the velocity ratio of your shrouds to your jib/forestay so the strings move the correct amount and retain the tension - On my boat it is 1:2 (as near as) which makes it easy.

Dont bother with muscle boxes (even if you can find them), too much friction for a given velocity ratio that a cascade.



nice one, but what does the green line do? i'm guessing it's shock cord.....

No, The green string has to be very low stretch - it is the key to the single string operation.  
It couples the shroud adjustment to the jib halyard and maintains the rig tension when adjusting rake.  As the rake string pulls on the shrouds to increase rake the jib halyard is released proportionately maintaining rig tension.  Similarly to decrease rake the jib halyard is pulled on and the shrouds are eased.  

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Post Options Post Options   Quote G.R.F. Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jan 12 at 11:35am
[sybil faulty] On an Albacore [/sybil faulty]

Edited by G.R.F. - 17 Jan 12 at 11:35am
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Post Options Post Options   Quote JohnW Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jan 12 at 11:41am
Originally posted by G.R.F.

[sybil faulty] On an Albacore [/sybil faulty]
LOL

<Basil Fawlty> Next contestant, Mrs. Sybil Fawlty GRF from Torquay Hythe. Specialist subject - the bleeding obvious. </Basil Fawlty>

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Post Options Post Options   Quote zippyRN Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jan 12 at 2:23pm
Originally posted by alstorer

[
I'd say you've got the bug pretty badly. Before you know it the weight of blocks and lines will be almost as much as the weight of the boat itself. Peer into a Merlin, 5o5 etc at the dinghy show to see where your future lies.
(interestingly, there's an odd level of crossover in people between the stringtastic merlins and the "clean" B14, showing that stringitis is not entirely debilitating but can be contaiguous).


Merlin / 505 / stringtastic albacore is like a  gentleman's grand tourer , a tour de force of sophistication adjustability and bespokeness ...

a B14 or other such 'clean' skiffs is something like a bike engined caterham - you set it up and hen it goes like stink 
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Post Options Post Options   Quote getafix Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jan 12 at 2:51pm
Originally posted by zippyRN

Originally posted by alstorer

[
I'd say you've got the bug pretty badly. Before you know it the weight of blocks and lines will be almost as much as the weight of the boat itself. Peer into a Merlin, 5o5 etc at the dinghy show to see where your future lies.
(interestingly, there's an odd level of crossover in people between the stringtastic merlins and the "clean" B14, showing that stringitis is not entirely debilitating but can be contaiguous).


Merlin / 505 / stringtastic albacore is like a  gentleman's grand tourer , a tour de force of sophistication adjustability and bespokeness ...

a B14 or other such 'clean' skiffs is something like a bike engined caterham - you set it up and hen it goes like stink 


you can't even remotely claim to love string and multi-purchase systems if you've never owned an FD, the absolute, hands down, stringiest stringtastic boats ever.... 16:1 cascade adjuster on the road trailer please .....phwor love it!!
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Post Options Post Options   Quote G.R.F. Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jan 12 at 2:56pm
Originally posted by zippyRN

 

Merlin / 505 / stringtastic albacore is like a  gentleman's grand tourer 
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Post Options Post Options   Quote 2547 Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jan 12 at 3:10pm
Originally posted by rogue

Originally posted by JimC

Ah, I see what's happening now. GRF: you have a nasty case of stringitis.

I sailed an Etchells once... it had a fine tuner on the jib car.  

The reason Graeme is going on about so much tweaking (from the same keyboard that ridicules the tweaker classes).... well, it keeps the dreaded thing off the water for just a while longer, thus delaying the inevitable D-Day when he realises it a) sucks and b) cost him his pension to find it out.  LOL
 
Sounds about right; most excellent breakthrough products are simple; the V Turd is not simple ....
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Post Options Post Options   Quote ex laser Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jan 12 at 3:12pm
g.r.f.

must be an old photo, because you look quite young in it! Wink
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Post Options Post Options   Quote RS400atC Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jan 12 at 6:33pm
Originally posted by JohnW

Originally posted by getafix

Originally posted by JohnW

As You have had ideas from the Merlins, I thought I would throw in the arrangement that I have on my Albacore, (you know you love them!  Tongue)

I have a single string that adjusts the jib halyard and both shrouds together to control rake, as well as the option to adjust each individually:





Blocks with black centres are fixed, others are running.  The first stage of each cascade (at least) need to to be high tension blocks for example the ones on this page:

To do the single string rake control, you need to know the velocity ratio of your shrouds to your jib/forestay so the strings move the correct amount and retain the tension - On my boat it is 1:2 (as near as) which makes it easy.

Dont bother with muscle boxes (even if you can find them), too much friction for a given velocity ratio that a cascade.



nice one, but what does the green line do? i'm guessing it's shock cord.....

No, The green string has to be very low stretch - it is the key to the single string operation.  
It couples the shroud adjustment to the jib halyard and maintains the rig tension when adjusting rake.  As the rake string pulls on the shrouds to increase rake the jib halyard is released proportionately maintaining rig tension.  Similarly to decrease rake the jib halyard is pulled on and the shrouds are eased.  


On a Merlin, the one string raking can also adjust lowers, puller and kicker!
It's a shame you can't use a microprocessor and some stepper motors.
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