Yes the client is in fact thrilled. He wanted to see with the weight savings in the deck structure just what would happen to stability. The righting arm curve crossed the “0” line a bit further to the right as it were and he was of course, quite pleased. I explained to him just what was going to happen when a few hundred pounds of unnecessary weight is removed from the deck structure and thanks to ORCA and it’s sensitivity to the VCG, the righting arm looked a bit better than the “as built” deck which was a hodge podge of the following ingredients: (against the deck beams) 10 gage copper sheet and yes I was amazed as anyone, but I learned a long time ago that to be surprised is often not very surprising! Next: 1 1/2" mat + 10 oz. cloth set in polyester resin and yes, it was not attached to the copper but in a few tiny patches here and there and finally a teak overlay that was the only part of the deck with any structural integrity: the boards were 2" x 1/2"! I followed scantlings based on a spreadsheet I designed a few years ago this is comprised of the formulas found in Dave Gerr’s “Elements of Boat Strength” using the "sandwich construction part of the scantlings. My deck was considerably lighter and much stronger with far greater attachment to the hull, deck house, beams and cockpit coaming than the original home made deck.
I should quickly point out the this boat was built on a hull that Henry Hinckley produced and sold along with a few other in an effort to raise money to pay off the tooling costs of the b-40 or so I was told. Someone bought a hull and created that bizarre deck structure likely from materials he had on hand.
I have a ton of such stories but all for now, and cheers, Rob and PS: the attached is my future boat that I shall build for Kellie and myself using my lottery winnings!