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Tuesday, August 21, 2012

Another Grab Bag Weekend...

Progress on numerous fronts, but nothing "complete".

Bow Pulpit

Got the first batch of parts from the jet-cutter. Cut from half-inch 316 stainless steel, these make up the jib/bobstay fitting and the aft mount brackets and backing plates.
Bow pulpit parts fresh from the water-jet cutter

These backing plates have a hole pattern that match those of the mount brackets. Three holes each side. I hand tapped 5/8-11 coarse threads in each (that was fun). The pulpit will be thru-bolted to these backing plates atop the caprail. Threaded backing plates allow "one-person-one-tool" install/removal of the pulpit (my favorite kind of removal, though the puplit will be a bit heavy for one person to handle).
Setting the backing plates (three bolts, both sides) with the jig, until the adhesive cures

Using the CNC machine, from the CAD drawings, I built a jig from 3/4 inch plywood that was used to spot the holes on the caprail for drilling and setting the backing plates underneath (gooped in with 3M 5200 adhesive). To help keep everything aligned and centered during fabrication, I will provide the same jig to my stainless guy when he builds the platform (next week or so). The hope is this will eliminate any trial-and-error fitting.

Interior

The few remaining overhead liner cleats were installed in the forward head and aft cabin. Strips of one-inch thick Coosa board (the very low density bendy grade) were gooped(epoxy) and screwed in place. Also installed were remaining under-sidedeck cleats for mounting the grabrails, and top edges of cabinet faces. With all the cleats installed, more insulation was cut, fitted and placed (its gonna be toasty in there this winter).
Overhead cleats (grey) and insulation (black). Aft cabin.

More cleats and insulation. Forward head.

What about the V-Berth?

A question on the interior remains: how much do we trim out the v-berth? So far, we expect the v-berth to act as the "garage". While there are two over/under berths built in, for two smallish people, we expect this area will be full of crap 99% of the time. Things like bags of sails, fenders, coils of line, bags of stuff, etc. If that is the case, then it won't be a regular "living space". So, do we really need to trim out the v-berth like the rest of the interior? That does not mean it will go unfinished, but maybe a more simpler kind of interior?

2 comments:

Colin said...

I never have the water jet cut holes for tapping because they tend to taper or be under or over. I have them cut the holes a 1/16 under and finish it with a drill. in your case a 17/32. If tapping is difficult, sacrifice a tap by carefully grinding the teeth back half way. Run it through and then finish (follow) with a new tap. Sometimes it is the only way to tap SS.

Robert Sutton said...

Thanks for the tip. No problem drilling and tapping the hole. It is just slow, careful, and lots of cutting oil.