This blog began in late 2006 with the planning and preparation for a circumnavigation of the world in my 39-foot sail boat Pachuca. It then covered a successful 5-year circumnavigation that ended in April 2013. The blog now covers life with Pachuca back home in Australia.

Pachuca

Pachuca
Pachuca in Port Angeles, WA USA

Friday, April 12, 2019

Refurbished Turning Blocks

The turning blocks is typical of the detours that have delayed the project.

The turning blocks redirect the sheets (ropes) from jib, staysail, and spinnaker to the cockpit winches.  They endure enormous loads hour after hour when the sheets are tensioned hard using the maximum strength of both arms applied to the winch handles.
Cracked coaming gel coat on starboard side

Duralac corrosion protection for backing plate

Ready for reassembly

Refurbished turning block in position

The sheaves of the starboard block were jammed and it seemed like a simple job to remove both blocks, take them apart, and lubricate them.  They both proved to be in bad shape and we refurbished them by having new centers fitted to the pulleys and having the plates re anodized. 

The coaming of the starboard turning block showed evidence of strain with cracking on the outboard gel coat and an actual crease in the coaming.  We corrected the problem by replacing the 2mm thick interior backing plate with a heftier and larger 5mm plate and adding a 3 mm plate on the outboard side of the coaming.  Thus that section of the coaming would be sandwiched between the two stainless steel backing plates. I also sanded the teak mounting blocks with 2-pack varnish.

The machining, anodizing, and unexpected problems in re mounting the blocks cost us a total of about 1 day's work spread over a week but the result was very good and made the effort worthwhile.

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