james nolan wrote:
> - - - - - - - - - - - - - - - - - - - - - - - - - - -
> West Wight Potter Website at URL
> http://www.lesbois.com/wwpotter/
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> What effect does all this have on the metacentric radius?
>
> -----Original Message-----
> From: Yarbrough, Linton <lyarbrough@doeal.gov>
> To: 'wwpotter' <wwpotter@tscnet.com>
> Date: Friday, June 18, 1999 2:54 PM
> Subject: New Kid on the Block
>
> >- - - - - - - - - - - - - - - - - - - - - - - - - - -
> > West Wight Potter Website at URL
> > http://www.lesbois.com/wwpotter/
> >- - - - - - - - - - - - - - - - - - - - - - - - - - -
> >Greetings to All in the Potter WebGroup:
> >
> >My name is Linton W. (Lin) Yarbrough & I must confess to lurking behind
> >the scenes of this informative/friendly site for the last few weeks.
> >I'm truly looking forward to your answers to my inquiries and my
> >contributions to yours , based on my sailing (somewhat limited) and
> >construction/building (somewhat extensive) experiences.
> >
> >Where to start ?? I guess it's best to just jump right in.
> >
> >After several years of searching for the boat to fit my criteria, the
> >WWP-19 was selected. Living in Albuquerque, NM required something that
> >could be trailered and launched easily (approx. 80k acres of lakes w/in
> >5 hrs. drive time, but the key word is DRIVE). My wife of 31 years
> >still hasn't overcome her childhood fear of water (stability was VERY
> >important). Comfort for 2 people, or the occasional 3, for extended
> >periods (large interior vol.= hard chines = great initial stability,
> >that S word again). Etc., etc, etc. (Does anyone remember Yul
> >Brynner??) Y'all've heard the litany before- I'm just preaching to the
> >choir. Anyway, the WWP-19 had everything except a decent interior
> >layout for our needs.
> >
> >We picked up the boat 1/97 at the factory and pulled it back to Alb.
> >behind my 93 Suzuki Sidekick (the bigger one w/4 doors). Could cruise
> >at 65 in 5th gear across the AZ/NM flats, even with the Baja Trailer
> >from Garges.
> >
> >I had planned on extensive mods to the interior. After studying the GRP
> >liner molding and refining my thinking for several months about what I
> >wanted to do with the boat, I wheeled it into the garage; hoisted it off
> >the trailer on a 4"x4" post assembly (there's a story in that, I'll
> >assure you); and promptly gutted the interior. Yup, cut out the entire
> >liner (pan) molding and flotation. Yup, brand new boat, an aquatic
> >virgin. Babe (see above reference to 31 yrs.) gathered all her faith in
> >me and tried not to cry too much. She's been sitting in the cradle I
> >built on the garage floor since 6/97. (She = boat, not Babe.)
> >
> >Well, what's been done over 2 yrs?
> >1. Interior (liner, pan) mold removed, along w/all hardware on boat.
> >2. Entire interior surface of hull and deck/cabin ground down through
> >GelCoat to bare FG/Resin and smoothed out. (104 lbs of grinding dust,
> >so far!!) I thank the Great Power that's over & done with. Can I get a
> >terminal case of FG itchies???
> >3. Hull bottom interior covered with 3/8" exterior grade plywood set
> >into 8 oz FG mat & wet resin. Forward, deeply curved sections of hull
> >bottom interior filled in with wood shavings/resin mixture to make
> >surface for plywood that was co-planar w/aft sections of hull bottom
> >interior. (Co-planar in the sense of a simple curve as opposed to a
> >compound surface- id est TWISTED plane). Hull side-walls covered with
> >1/4" plywood, as above- simple surfaces all. Transom interior covered
> >wit 1/2" plywood & 2 mat layers, as above.
> >4. Hull/deck joint groove filled with shavings/resin and covered with 3"
> >wide strips of 1/4"plywood set as above to overlap hull side-wall
> >plywood.
> >5. Cabin side-walls beefed up with 1/8" mahagony plywood, as above.
> >Rest of cabin walls with 1/4" plywood, as above.
> >6. Built a gas-tight, aft compartment for 8 gal gasoline & 20 lb. butane
> >tanks. Compartment reduced cockpit sole area by 23%, but gave a new
> >seating surface across the transom between the original seats. Great
> >additional support for transom and cockpit.
> >7. Worked on beefing up the cabin roof in prep for installing a
> >mast-bearing bulkhead in place of the compression post.
> >8. Tons of other, smaller jobs plus many hours of reading, thinking,
> >drawing and calculating.
> >9. Two major renovation projects in the house that cut 9 months of
> >weekends out of the boat project.
> >
> >
> >Well, I've taken up enough of your reading time in briefly discussing
> >this project. I have a bazillion questions about outboards, sail plan
> >mods, etc. They'll just have to wait.
> >
> >However, I'm sure there are 3 central questions running through the mind
> >of anyone who has stuck with this rambling missive thus far-
> >Q1: Why even buy the dang thang if you're jus' gonna tear it apart?
> >A1: Loved the outside; hated the inside.
> >Q2: Why all the plywood lining the interior surfaces?
> >A2: Drastic increase in hull and cabin stiffness plus thermal and sonant
> >insulation plus smooth, easy-to-build-on surface for the furnishings
> >(bunks, cabinets, bulkhead, shelves etc.)
> >Q3: What about all the weight changes- redistribution, addition or
> >deletion?
> >A3: Being a quintessential techy-nerd (PhD in Phys. Chem. and all that),
> >I have essentially memorized Skene (and done the hull calcs, sail calcs,
> >calc. calcs) and believe the redistribution will be balanced properly.
> >Records of all material removed or added have been kept (accurate to +/-
> >0.1 lb). Thus far with all the changes above, the net is 13.4 lb gain
> >(that GRP liner molding was surprisingly heavy, as were the puddles of
> >resin and GelCoat hidden under the liner mold in such a craftsman-like
> >manner by IM). Determination of center of mass, center of buoyancy,
> >lateral resistance, center of effort and other Skene factors have been
> >critical in my hopes for the boat. I believe that the net dry weight
> >will be 150+/-50 lbs above what she was from factory (again, she = boat,
> >not Babe). "Dry weight" as in no food/water, supplies, un-attached
> >equipment, fuel, motor, etc. Since she is being re-done for typically 2
> >people AND she is designed to sleep 4 (Naw, too obvious !!!), I think
> >I'll be just fine.
> >
> >Looking forward to a long and mutually beneficial cyber-relationship,
> >
> >Lin Yarbrough
> >WWP-19 #928, (waiting for the name Muse to caress my throbbing brow)
> >Albuquerque, NM
> >