first GF was going to be a plain Jon boat but while researching some old
designs, we discovered the lines of a classic garvey listed as a duck
boat in the plans catalog of the Smithsonian.
That beautiful hull shape could be adapted with some tinkering to our
preferred material. We dropped the Jon boat look and redesigned the classic
garvey, keeping the looks but with ease of construction as a top priority.
Despite a common misconception, a pretty boat is not more difficult
to build than an ugly box.
This boat will do all what Jon boats do but look much better and have
a higher resale value. It can also be used as a duck boat.
designed the GF14 first and with a small change in the building method,
we were able to increase the length to 16'.
GF16 is a flat bottom garvey. While this is easier to build, provides
great stability and requires less HP for the same speed, it will not go
through a chop as well as a vee hull.
We minimized the pounding by keeping the strong bow curvature of the original
to the GF14, the GF16 uses the same amount of plywood, see the building
method notes below for an explanation.
method: The boat is built in stitch and glue fashion but most of the hull,
the bottom especially, is a true composite sandwich. The plywood bottom
is sandwiched between layers of directional glass and it is the fiberglass
that supplies most of the strength, not the plywood.
in our other boats, the frames and seat tops are part of the structure.
assembly method differs from the GF14. In the 16, the side and bottom
panel parts are spliced together with fiberglass instead of a butt block.
This leaves more plywood for longer panels. We get a longer hull but loose
the advantage of the butt block used as a locator.
all our stitch and glue boats, the GF16 is easier to build than other
plywood or fiberglass boats.
We worked hard to keep the building as simple as possible: most of the
plywood cuts are straight lines, the nice curves are created by well planned
bending around the frames.
All the plywood parts have been precisely calculated: you cut them flat
on the floor, no need for templates, no need to take measurements from
the hull framing as in the plywood on frame method.
boat can be built fast by a first time builder. He should read our tutorials
first but there is nothing difficult in the building method. No beveling,
no tricky adjustments, no lofting at all, no calculations of any kind:
we show dimensions for all the parts on the plans.
is a simple boat with few options.
The bottom is already made of a strong 3/8" fiberglass sandwich but
some builders may want to add layers. We don't see any good reason for
that but it is possible.
could adjust the size of the rear seat or the foredeck, eliminate the
hatch that we show in the stern seat or change the forward access to a
lid but that's about all.
As all of our boats, the GF16 can be made unsinkable with foam, see our
boats transom is designed for a standard 20" shaft. The transom can
easily be modified to accept other shaft lengths.
Of Materials: (Excerpts
from our BOM)
BOM list materials based on our standard layout and includes a 15% waste
factor for fiberglass. For plywood, we use standard sheets 4' x 8' (122
x 244 cm). Please read the building notes and see the plans for detailed
specifications. Marine Tech or XL boat building plywood is an inexpensive
type of marine ply ideal for stitch and glue construction. It cost, on
the average, less than $ 80.00 a sheet in 1/4" (6 mm). Okume or Meranti
marine can also be used and cost starts at less than $ 100.00 a sheet (1/4").
Good quality exterior is acceptable if it has no voids.
See our kits and add the cost of plywood. In Florida, in 2002, the estimated
cost of materials is less than $700.00.
The hull can be build in 20 hours but a finished boat will require 40
hours or more depending on the level of detail and the skills of the builder.
Visit our message board, help pages, tutorial pages and read our FAQ:
most questions are answered there.
detailed drawings with all dimensions required to cut the side panels,
bottom panels, bulkheads, seats and all parts from flat plywood sheets:
no lofting, no templates required.
Nesting drawings for the best plywood layout, all parts nested.
Plan and Profile, Specifications.
Plywood nesting for all parts.
Construction drawing with plan and profile sections. Typical fiberglass
lamination detail. Frames and bulkheads dimensions. Detailed notes.
dimensions for all hull panels (flat), seat tops, butt blocks, foredeck
panel, outboard clamping board.
Detail drawing for seat locker lid with framing and assembly view.
Small Boat Electrical
building notes for this boat with Bill Of Materials.