Re: Super Maramu Main Mast Furling foil Sheered
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I had not seen the photos ,I now see that the sail groove would keep a sleeve from rotating within the foil,I still think I will mill it from solid stock and mill it to fit around the luff groove.
From: James Alton via Groups.Io <lokiyawl2@...>
To: main <main@AmelYachtOwners.groups.io>
Sent: Tue, Jan 28, 2020 8:02 am
Subject: Re: [AmelYachtOwners] Super Maramu Main Mast Furling foil Sheered
One thing that could affect the wear rate of the extrusion attachment hole is the bolt itself. Check to be sure that there are no threads in contact with the surfaces that bear the torque stresses. The smooth part of the bolt should in other words be long enough to allow tightening when bottomed. It may be necessary to have a custom bolt made to attain the correct length. One can think of the threads of the bolt as a sort of a file that will chew out a bit of aluminum each time the joint is loaded.
The internal bushing sounds like an interesting idea.