Saturday, November 13, 2010
Thursday, November 4, 2010
İ made sure that all surfaces, all joints, all filets, all fiberglass tapes edges were smooth as baby skin. All the edges of my kevlar reinforcement strips were sanded, then faired, then sanded again.
İ can probably throw any nylon sail inside without fearing that it will tear as soon as it is pulled out, so mission accomplished.
Once it was smooth enough in every possible corner, İ wiped all surfaces with water and sponge to remove any left over amine blush. Then İ used İnternational 216 thinner to clean them even better. İ finished the prep by blowing compressed air to get rid of the last particles !
İ know it is overdone but, hey, İ enjoy the building process and İ am in no hurry to finish !
Then İ finally primed it with Epoxi Prekote. Yeap, this time İ used the right stuff for epoxy surfaces. But boy does it smell bad !!! İ am really glad İ was wearing an organic respirator for that job !
I will sand it very lightly since my objectif is not to get a mirror finish paint job, and apply Brightside which I have leftover from my keel
The foam was first faired wherever necessary with fairing filler (İ love working with it) then glassed from above with a large fiber tape.
Then the foam structure was reinforced from below with a long, continous tape of carbon fiber. This was done in order to give the needed strength to the foam part which will probably be abused as soon as İ start sailing the boat. İ mean knees, feet, heavy asses of all sort etc... So İ wanted to make sure this delicate part will hold. İ guess Airex foam + fiber + carbon will do the trick
İ finally glassed the front bunks.
İ cutted large fiber panels and layed them from starboard to port, perpendicular to the carbon fiber İ had already used to reinforce the bottom hull seam. This will give me additional strength at the bottom of the hull.Just before glassing İ also used fairing filler to round off the bunks edges. Took a little while to get it right but it was worth the effort. The fiber cloth wrapped nicely around those curvy angles.
Then İ moved on to the compression post base.
Not much to say about those except that İ opted for a pyramid of two blocks, glued together, and to the hull and frame, with microfibers. (The picture below shows some rough fairing filler which was then nicely sanded)
The bottom one goes from port bunk stringer to star bunk stringer. İt will help in distributing the forces on the compression mast to the whole stringer structure which was itself reinforced with kevlar.
For the upper block İ switched the grain orientation and it is placed grain up. The base of the compression post will be screwed onto this block.
And last, in order to minimize frictions and wear of F89, İ wrapped it around with a 1 mm alu sheet. So İ will have alu rubbing on alu. We will see how that works.