Dragonfly Bill of MaterialsLUMBER: Do NOT purchase any lumber until you read this section. Do
NOT purchase any NET SIZED material. All lumber thickness specified should be
purchased as standard lumberyard stock finished as full as possible. As an
example, 1" stock is NOT to be a net thickness of 1". Stock 1"
thick refers to lumber purchased as "four quarters" material that
will finish from 3/4" to 7/8" in net or actual thickness. Widths,
however, are noted as "net" unless specified otherwise. (Exception:
All 2" thick DF stock is lumberyard size in both thickness and width
except those marked with a double asterisk "**" (see note under **
below).) Purchasing random-random material to re-saw to the required size will
result in considerable savings. Some suitable boatbuilding woods include
mahogany (dark red Philippine, Honduras, or African) clear vertical grain
Douglas-fir, Sitka spruce, white oak or longleaf yellow pine. Similar woods,
available in the building locale and common to boatbuilding, may be substituted
at the discretion of the builder. The prototype was built primarily from dark
red Philippine mahogany. The listing below calls out the preferred lumber
"see above" means any of the foregoing lumbers can be used. Check all
listings to the work prior to purchasing materials.
PLYWOOD: All plywood must be intended for marine or exterior use.
Interior grades are NOT acceptable. Marine plywood has higher grade inner ply
cores, while the exterior grade cores may be of inferior material and have
inner voids not apparent to the eye. In most cases, the glues used in both
marine and exterior panels are the same, however, the decision to use exterior
in lieu of marine panels for planking must lie with the builder. Most exterior
plywood is not 3/8" thick; it is classed as "scant" and is a
fraction less than full thickness. Take care if mixing marine and exterior
panels that must butt join. Marine plywood is recommended, especially for the
bottom. Douglas-fir plywood is acceptable in all cases although other species
of suitable grade may be used alternately. The grade of the exterior veneer of
a plywood panel is identified by the letters A, B, and C. For planking, the A-A
(best) grade is desirable. The best face of all panels should be the one
exposed. Check the PLYWOOD LAYOUT in these instructions and the text for method
of utilizing the listed plywood to obtain the various parts.
FASTENINGS: All permanent fastenings should be of a non-corrosive type. Screws as noted are of the flat head wood type, while nails are of the annular ring shank type commonly used in boatbuilding. Screws should be hot-dipped galvanized or preferably silicon bronze while nails can be bronze or Monel. Electroplated steel and brass fasteners are NOT advised. Carriage bolts are to be complete with nut and washer with galvanized being satisfactory. * NAILS: Ring type, bronze boat nails.
* EPOXY RESIN: For gluing, laminate application, interior epoxy encapsulation, resin putty and taping seams: - Approx. 4 gals. + 1 qt. * MICROSPHERES: (or equal) - 2 lb. * SILICA: - 1 lb. * These items are contained in the GLEN-L Stitch-N-Glue Kit PLUS a sampling of application tools, squeegees, brushes, and rollers. FIBERGLASS CLOTH: For exterior encapsulation and sheathing, 7-8 oz. treated boat type.
These items are contained in the GLEN-L Fiberglass Covering Kit plus a sampling of application tools, squeegees, brushes, and rollers. |