Should a mizzen be straight? Or raked aft. And mainmast forestay tension

steve yates said:
:) maybe 10 then ? My geometry may be out, but I'm sure I don't have it set right., just looks wrong. It's definitely not straight, nor parallel to the mainmast.
How was your new boat? And the trip?
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Looked again this morning, the mizzen is parallel to the main mast to within a couple of degrees, both raked slightly aft as they should be, and to my eye the rig looks fine, in line laterally too as you can line them up from behind, I will be around tomorrow when you come up and ready to argue. I do agree about supporting the mizzen from forward if you are going up on the mizzen halyard to fit the triatic.
Jackie says he is making a list for you!

Corona sails really well (touching 7kts. on a lose reach) and motors slowly (tiny folding prop.?) wind on the nose all the way, but never over 20kts. mainly 10-15, but 87 miles in 14 hours yesterday pleased me well enough though I motorsailed all but a few hours in the N Channel approaching Sanda when I got the engine off. Strangford Narrows was flat calm as I came out. Both 31 footers I think yours will be the opposite.
You can tell me what you think tomorrow.
 
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Won't get to Ian's till the evening, my flight times are crap, so we'll come up tue morn, be there for lunchtime.
Ok, that sounds reassuring about the mast, Jo says she reckons it was five degrees, but once I get the triatic on that may sort it.
 
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If you go to the WOA website, sign in as a guest, click on The Westerly Range and then select Renown, there's a very clear picture of a Renown Ketch under sail. There's definitely no triatic.
 
Further up the thread, it was mentioned about tension being similar between shrouds and triatic. No way. The shrouds have narrow angles, therefore, much higher loads, the triatic is simply a cable between the mast heads and deals with much lower loads. (if at all, since doubt if it needs it ) The idea of a 'bottle screw' at the deck to tension the triatic is daft.
DW
 
DownWest said:
Further up the thread, it was mentioned about tension being similar between shrouds and triatic. No way. The shrouds have narrow angles, therefore, much higher loads, the triatic is simply a cable between the mast heads and deals with much lower loads. (if at all, since doubt if it needs it ) The idea of a 'bottle screw' at the deck to tension the triatic is daft.
DW
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Granted the triatic doesn't need much tension, certainly nothing like shrouds, but other than a bottlescrew how would you suggest getting the length adjusted? Come to think of it, my guardrails are adjusted with bottlescrew, and there's even less tension on them. Is that "daft" also?
 
NormanS said:
Granted the triatic doesn't need much tension, certainly nothing like shrouds, but other than a bottlescrew how would you suggest getting the length adjusted? Come to think of it, my guardrails are adjusted with bottlescrew, and there's even less tension on them. Is that "daft" also?
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My CW28 ketch has a triatic, it runs from mainmast head to mizzen head, down via a turning block, splced to rope haliard then simply ties of on a cleat. No way of putting lots of tension in it, so I would guess not much tension required.
 
NormanS said:
Granted the triatic doesn't need much tension, certainly nothing like shrouds, but other than a bottlescrew how would you suggest getting the length adjusted? Come to think of it, my guardrails are adjusted with bottlescrew, and there's even less tension on them. Is that "daft" also?
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Perhaps 'daft' was a bit strong, but the odd triatic stay I saw was only from mast head to mast head, not bought down to the deck to adjust the tension.. A bottle screw has limited ajustment , so not a lot between the mast heads in real terms.
 
richardbrennan said:
If you go to the WOA website, sign in as a guest, click on The Westerly Range and then select Renown, there's a very clear picture of a Renown Ketch under sail. There's definitely no triatic.
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The Longbow is not a big boat and the forward stays for the mizzen are limited to a tight angle, otherwise they would block access to the cockpit, the wire triatic stay from the main mast top ends in a block which provides 2-1 purchase on a rope that runs from an inglefield fixing on one side of the mizzen mast head, back round a cheek block on the other and down to a cleat near the foot of the mizzen, it would be difficult to over tension but should be stiff enough resist the rearward pull off a sheeted mizzen sail. It is necessary because the angle of the forward mizzen stays is so shallow. A larger boat with wider spread stays may not need triatic support, I am sure this one does if the mizzen sail is to be used.
Now that we understand it better it should be possible in future to use a cord to lead the stay tail in to place without the need to climb. (well two cords which would be joined once the two masts are up.)

I am not familiar with Westerlys, perhaps the Renown is centre cockpit with more room to spread the stays?
 
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