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2:1 head shackle is Tylaska H5

 

 

or for those running a more budget style campaign they could use a "mylaska" available at all good marine stores :)

 

(also known as a shackle and a sheave)

 

Ah now that's a great idea... has it ever unscrewed itself though? Guess you just need to tighten it with a shackle key…

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2:1 head shackle is Tylaska H5

 

 

or for those running a more budget style campaign they could use a "mylaska" available at all good marine stores :)

 

(also known as a shackle and a sheave)

 

Ah now that's a great idea... has it ever unscrewed itself though? Guess you just need to tighten it with a shackle key…

 

Actually that is not a good idea.

 

One day that rope will jump off the sheave. expect it to happen when you are reefing in 40 knots.

Also quite quickly the sheave will get mutilated then it will wreck your rope.

 

Tylaska's aren't too expensive and available from Fosters (Harken NZ)

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yes your points are correct mr wolf, when the halyard is slack the shackle can move around allowing the rope to jump off, but a bit of tape each time rectifies this issue.

 

We have been using the same sheave now for 2 years and it has not been at all damaged and has not been mutilating the rope.

 

"Tylaska" is a much more elegant solution. But "Mylaska" is definitly a solution.

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Tylaska H5 are made from aluminium, I thought Mr Wolf, you are adimant aluminium has no place in a marine envrionment. Or does that not apply to aluminum (carefully note the spelling) as tylaska's are made in the US..... :o

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By way of explanation.

 

We have seen a few cases where the Mylaska type of homemade shackle sheave thingy has fallen over.

this can happen when the halyard is loose, I used the example of reefing in 40 knots, sometimes you ease the halyard but

the head is hard to pull down.

In that case its quite possible for the halyard to find its way into even a small gap between the shackle and the sheave.

 

The second problem is if you over hoist the halyard and the sheave hits the underside of the head crane. Over time this can cause the sheave to break and if that should happen it is likely to damage your halyard rope.

 

I know the above because I've personally seen it on a few occassions.

 

Most of the rigs we service have a Tylaska shackle at the head (or a similar product).

 

the advantages are:

Very light weight

The shackle can be pulled up very high getting your main up higher.

The shackle fits between the plates of the head crane.

No moving parts

Shackle pin is captive (so easier than fumbling around with the sheave in your hand as you pass the shackle through the head of the main, then reassemble the sheave)

 

I guess though at the end of the day they are made of alloy (very bad) and they cost $100 so won't be for everyone.

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Fair enough Tim. I see wichard do a similar concept to the tylaska too. No idea on cost.

 

I guess though at the end of the day they are made of alloy

 

Not a problem for most people... :lol:

 

and they cost $100 so won't be for everyone.

 

A problem for lots of people

Halyard.JPG

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The other option is the middle sized Wichard halyard shackle, and the medium sized low friction alloy thimble fit well together. Its a poor mans Tylaska, and what we are running on Slipstream (Y88) and Creepy Crawler at the moment. It works very well and a whole lot cheaper!! You just slightly bend the shackle open a touch to get the thimble in, Then close it up tight around it.

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