For the very latest activity, click here: From a Bare Hull
Batteries Bilge Bilge Pumps Blog Bow Pulpit Bow Thruster Bulkheads Cabinets Cable Master Canvas Cockpit Construction Coosa Deck Deck Hardware Design Dinette Distributed Power Driveline Electrical Electronics Engine Engine Room Equipment Exterior Fiberglass Finish Work Floors Fuel System Fun Gadgets Galley Hard Dodger Head Heating and Air Conditioning Ice Box Ideas Insulation Interior Keel Lighting Main Salon Mastervolt Masts Materials Mechanical New Technologies Off Topic Paint Panel Philosophy PlasTeak Plumbing Portlights Ramblings Rigging Rudder Sailplan Sails Sanitation Steering Tanks Techniques The Other Boat The Shop Thru-hulls Tick Stick Tools V-Berth Welding Wiring Wood
Monday, September 22, 2008
Things are getting to the point (at least in the main salon and forward) where we need consider a different building material besides Coosa Board. In this project, Coosa board has been used for portions of the interior structure that is glassed to the hull. Reasons for Coosa over plywood are 1) resistance to rot 2) porous surface gives superior resin adhesion. Additional positive qualities over plywood are 1) lighter in weight and 2) easier to work with. But now, we need to consider materials used for things like cabinet faces and settee supports. This is where some of our interior design ideas have impact. Specifically how we will handle "corners". Generally, there will be few 90 degree "hard jointed corners" in any of the cabinetry. Instead, there will be "rounded corners" of about 2 and 4 inches radius in numerous places. As they do not involve glass work, using Coosa Board for this is a little too much and actually complicates the construction. This also can be done with plywood and hardwood joinery with a bit of shaping, but that is a bit time consuming. Enter NidaCore Structural Honeycomb Material This stuff comes in numerous varieties, but the one in particular we are considering is the thin plywood veneered version. It is essentially a polypropylene honeycomb core laminated on both sides with a thin plywood veneer. One side is smooth enough to 1) prime and paint 2) skin with a hardwood veneer. More importantly, this material can be easily saw kerfed to give nice rounded corners. It shares some of the upsides with Coosa Board. Light and stiff (more so than Coosa actually). There are downsides. It is not as good for glassing to the hull, though it can be done. And with the core of this stuff being mostly air, it will not take a tapping screw as will plywood and coosa (there are alternate ways of doing this, but it is a bit complicated). And finally, the price. While it is more expensive than plywood, it is significantly less than Coosa Board per sheet. Nothing has been decided just yet, but the more I think about it, the more NidaCore makes sense.