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My mast is a hybrid affair. As it came to me, the foot and head were original Wharram-style wood, with 20' of aluminum tube separating them. While the boat was on the hard for bottom painting, I replaced the mast head (it was rotting) by sleeving new aluminum tube to the old aluminum section. This shot shows the new mast head with the standing rigging fittings installed, and the sheave for the internal jib halyard.

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Comment by Chris Bretter on October 14, 2013 at 2:49pm

Hi Kim.how are the shroud fittings through bolted,are the stainless components isolated from the ally ones. do you have any other pictures.Kind regards Chris

Comment by kim whitmyre on October 14, 2013 at 9:56pm

Hi Chris,

The hex bolt you see at the port shroud fittings goes through to the starboard shroud fittings; the bolt also goes through the crane that holds the forestay shackle. The nut used on the bolt is a casstelated  one:

All stainless self-locking flex nut. I used stainless washers that come fitted with a neoprene backing to isolate the ss from the aluminum

There is actually a circular top piece of aluminum that closes off the top of the mast. I rabbeted this piece so it could accept a gasket; I drilled and threaded the crane to accept ss machine screws. These are coated with a product called Tuff-Gel that isolates the two metals.

 

Comment by kim whitmyre on October 14, 2013 at 9:58pm

Comment by kim whitmyre on October 14, 2013 at 10:00pm

Comment by kim whitmyre on October 14, 2013 at 10:14pm

I radiused the piece that is the crane, so I could drill appropriate sized holes through the mast.  Then I cut out the material between the holes which allowed the nice fit of the crane.

Comment by kim whitmyre on October 14, 2013 at 10:28pm

Found another angle:

Comment by kim whitmyre on October 18, 2013 at 5:16pm

Here are the ss washers with the neoprene pre_applied to the back side:

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