'Nother reefing lines 'nundrum

[oldbilbo]

Puzzled I am over my boom end fittings..... which, with the boat, came 'semi-detached'.

Now, the tack end fitting has, quite conventionally, 3 sheaves with 3 jammer-levers. Nowt else.

Intriguingly, the clew end fitting has FOUR sheaves - 2 on top and 2 on the sides.

Now, I'm well conversant with most reefing arrangements, and can configure for 3 reefs - or 2 reefs and an outhaul control - but there remains a spare sheave at the clew end. Unless the kiddies' New Maths has introduced something rather remarkable, 'Four Into Three Will Not Go!' There are no other 'oles in the boom.

I will have arrangements for 3 reefs. The outhaul can be arranged conveniently external to the boom. That still leaves one mysterious and unexplained sheave....

Thoughts?

 

[sailorman]

Puzzled I am over my boom end fittings..... which, with the boat, came 'semi-detached'.

Now, the tack end fitting has, quite conventionally, 3 sheaves with 3 jammer-levers. Nowt else.

Intriguingly, the clew end fitting has FOUR sheaves - 2 on top and 2 on the sides.

Now, I'm well conversant with most reefing arrangements, and can configure for 3 reefs - or 2 reefs and an outhaul control - but there remains a spare sheave at the clew end. Unless the kiddies' New Maths has introduced something rather remarkable, 'Four Into Three Will Not Go!' There are no other 'oles in the boom.

I will have arrangements for 3 reefs. The outhaul can be arranged conveniently external to the boom. That still leaves one mysterious and unexplained sheave....

Thoughts?

Leach cunningham ( droopy boom) + outhaul

 

[dutyhog]

We've got the same boom, and I never bothered about the "spare" sheave. But there is a problem looming. The metal that the mainsheet shackle goes round is worn thin. I've wound wire round it and epoxied it in, as a sacrificial build-up. Is there a better way? I assume that spare parts are out of the question.

 

[oldbilbo]

. But there is a problem looming. The metal that the mainsheet shackle goes round is worn thin. I've wound wire round it and epoxied it in, as a sacrificial build-up. Is there a better way?

Consider using a very short webbing strop, instead of a steel shackle, onto the boom end fitting..... Alternatively, a multiple-part short 'selvagee strop' made of 5mm polysteel or SK75 or Dyneema cord, with a slim wear sleeve, instead of using webbing. Thus any further wear is on the cheap sacrificial short strop instead of the expensive and probably irreplaceable Proctor boom end fitting.

Shown in this diagram.... http://apps.leg.wa.gov/documents/laws/wsr/2012/20/.%5CWAC296-155-33825_01.gif

Fasten your mainsheet tackle onto that with your shackle.

 

[dutyhog]

Consider using a very short webbing strop, instead of a steel shackle, onto the boom end fitting..... Alternatively, a multiple-part short 'selvagee strop' made of 5mm polysteel or SK75 or Dyneema cord, with a slim wear sleeve, instead of using webbing. Thus any further wear is on the cheap sacrificial short strop instead of the expensive and probably irreplaceable Proctor boom end fitting.

thanks very much for the tip, with the diagrams. I'll do something like it very soon. Gordon

 

[yoda]

Oldbilbo

I have a similar conundrum with 5 sheeves on the outboard end and only 3 on the inner end however one of my extra sheeves has been used to take the 3rd reefing line which also uses a block external to the boom to turn it aft and it then emerges through a slot in the boom before turning round a further block close to the gooseneck. It is a PITH because of all the friction from blocks etc. When I spoke to eurospars they indicated that booms of that age probably have enough meat to fit a sheeve into the top to take a third reef so eliminating all the turning blocks. tto would like to know the logic of the side sheeves fitted to these proctor booms.

Yoda