Refit : Rudder and Centreboard Parts and materials

In 2023/2024 all nylon bushings and any corroded stainless or aluminum parts in the centreboard and rudder blade assembly were replaced.     

Replacement parts for CB and Rudder.

Parts ready to go!   Thanks to Thierry, Julie and the team at Alubat for going above and beyond.

Condition of pivots posts and bushings.  

After 20 years in use, the rudder's ertacetyl bushings and aluminmum  posts required replacement.  The centreboard pivot was as-new.

Rudder parts are pictured here, and are explained in English in the table below. 

Materials

Ertacetyl is the Mitsubishi trade name for acetyl plastic, one variant of which, homopolymer acetyl, is sold as Delrin. Here's an explanation:

https://www.aiplastics.com/blog/acetal-c-or-acetal-h/

(This material also appears in Hydroem’s cylinders, in that case the copolymer version.) 

Unfortunately, the grade of aluminum is not specified in the drawing.  Here's an explanation of the various alloys: