The album of Ariel #422

[ebb]

5 gal pail, one funnel, one bottle.
I also applaud your formula!
Equal in its simplicity (and importance!) to the equation above!


As to the cedar herreschoff bucket post on your websight,
it does seem possible to line your boxframe inside with tennessee closet lining.
Here's to many successful downloads.

[CapnK]

Tony, I thought of adapting the porta potty seat in some way, but after mulling it over, decided to forget it as it would have been much more work, for a less comfortable seat.

Re: those IP pics: Cool!!! Pics which show just what I was talking about with the IP chainplates...

Here's my extra chainplate explanation:

Ebb, everything in this pic is plastic and glass, no metals at all:
Attachment 6706 (<--- also at bottom of this post, attached to Tony before)

A bolt will come through the hole in the middle, from outside, that holds the chainplate. It'll have a big ol' washer or two on it, and a nut holding the whole assembly in place. The FRP thingamajigger is purely there to spread the load from that bolt coming thru the hull; to change it from a point load of vertical shear in one small location, by spreading the stress down and out onto a large area of the hull.

There will likely be two 1/4" layers of solid FRP located on the inside of the hull at each chainplate, one layer against the hull basically the same size as the chainplate, and then a row of these tabular things bonded to that which will help the FRP rope grip against the shear via a wider radius than if it simply wrapped over a bolt.

Put in the big piece against the hull, attach the smaller tabs, fair it all in with resin thickened w/colloidal so that the rope over the tabs has nice straight runs down onto the hull. Use that rope to spread the vertical shear stresses out over several square feet of hull surface, instead of just right there at the 'plates.

Here's a visual attempt at explanation:



Do dat make mo sense?

[Tony G]

Ahhhh. I can see clearly now my brain is gone....

Dang, Kurt you keep raising the bar! I am confidently hoping that the laminating schedule I used when tabbing in the aft lower chainplate knees and the main bulkhead did add enough beef to keep the bolt shafts of the external chainplates from 'egging' the bolt holes in the hull. I put down stitched matting, fabric, matting, roving, topped with matting again. I added 1/4" - 3/8" to the hull via the tabbing. I really like your approach but I am not taking out the main bulkhead so half of the fibergalss 'rope' would have to make a 90 and spread onto the bulkhead (and aft CP knee if I didn't remove 'em)
Does anyone here have any bad experiences with other boats and external chainplates?

[CapnK]

Yee-ha! The tabernacle is finished...

Below are some pics. As it stands now, it is ~18" tall, and 24" across the base (the base plate is 4" in the fore-aft dimension). I had it made to where I can put the pivot bolt as low as 14" (we'll see about that when I work with it some more). Most of the base will be under glass when I'm done mounting it, there will be no direct connection thru the deck to the strongback underneath, the whole area will be solid FRP(no core).

I'd never intended to use it much as a tabernacle per se; the reasoning for it was that 1) I wanted to have a VERY secure connection of the mast base to the deck, and 2) to spread the transfer of compression loads onto the under-deck support structure across as large an area as possible.

For reference, if you look back at the images of the internal/underdeck strongback structure, the diagonal arms of the tabernacle line up directly over the vertical supports of the strongback structure, and the tabernacle verticals fall just inside of the gussets between the horizontal beam of the strongback and the vertical supports of same.

That said, with the extra-warm summer we are having and the prediction of an overactive tropical storm season, the ability to drop the mast in my slip and head upriver underneath the 29' vertical clearance bridge next to my marina might just come in handy when ('if at all, and let's hope not', I pray) a whirly-girl comes to visit...