Halyard Diverters on an A9m

The A9m with headsail furling needs a Halyard diverter of some sort, and I suspect the same is the case with the A840 and possibly the other Achilles types. Unfortunately whoever installed the original and replacement furling systems omitted to fit one. This was the result:

I have reverted to a wire genoa halyard because a rope one catches
against the spinnaker sheave, the wire is thin enough to pass. 

A mast fit Halyard diverter by
Selden. It is made of a soft
metal so it wares out rather
than the halyard.
The problem is that the halyard needs to be at an angle of at least 10 or 15 degrees to the furling gear so that it can stop the halyard attachment rotating with the foil. For the same reason the furling gear should only be let in or out when the halyard is tight. 

A halyard wrap is a problem with wire or fibre halyards as they jamb the system and it can be VERY difficult to get the headsail down, especially in a rising wind. I was lucky in that I was furling the sail due to light winds and could get the sail down after the halyard broke (I now have a halyard a foot shorter), also that the halyard, being deliberately of light gauge, did not damage the forestay. Why it decided to wrap and jamb on this occasion (towards the end of my 2020 ground GB trip) after thousands of miles sailing I have no idea.

The diverter costs a few pounds and a few rivets or self tapping screws, there are two general types, one fits on the mast below the halyard sheave and the other fits on the forestay deflecting the halyard to achieve the desired angle, see 
A Forestay fit diverter
by Plastimo.
this useful piece by Cox engineering.

Both are is easy to fit with the mast down, the mast type less so with the mast up but still only a 30-60 minute job for a rigger with the right tools. 

Tracking down a wheel forestay type that could be fitted with the forestay in place was a challenge and I gave up and fitted the mast type which is in any case cheaper.

No comments:

Post a Comment