Novi 23 combines traditional styling with an efficient, easy to build
planing hull. She is not a true lobster boat of the double wedge type
or a pure fast planing hull. The hull type is similar to what is now frequently
called a picnic boat; a seaworthy planing boat but the topsides are more
in the Nova Scotia work boat style. We kept the deep forefoot of the modern
fast lobster boat hull but the underbody is a true monohedron. This means
that the transition to planing speeds will be smooth without any excessive
change of trim and without the wasteful suction of warped bottoms running
at an S/L higher than 2. (S/L ratio is speed in knots divided by square root
of WL in feet. Displacement boats are the ones with an S/L<1.3, planing
boats have S/L>2) The Novi 23 will perform well at displacement speeds in bad
weather and run efficiently at moderate planing speeds with relatively
This boats transom is designed for a standard 20" shaft. The transom
can easily be modified to accept other shaft lengths.
The Novi 23 has an enormous capacity: she can be loaded with up to 2,000
lbs of passengers, engine and gear.
calculated top speeds with moderate load (displacement 2,600 lbs) are
50 HP: 25 mph
70 HP: 29.5 mph
100 HP: 35 mph
For a normal cruising displacement of 3500 lbs, reduce those speeds by 8 mph.
Compared to traditional lobster boat types, the Novi 23 hard-chine vee
bottom hull will not only be faster than the typical round bilge type
but also deflects spray more efficiently.
The reduced deadrise aft increases stability at slow speed or rest.
Compared to our HM19, the vee hull will pound less and give much better
tracking when running off a steep sea.
The soft riding vee hull requires more labor and materials to build but
this hull shape is required for more exposed waters.
She also differs from our faster planing hulls through her deeper forefoot
and generous skeg for stability and tracking.
safe cockpit is deep and wide: 11'+ long (3,35 m), 8' wide (2,40 m) and
28" deep (71 cm). The full height motor well bulkhead provides excellent
protection from following seas. The cockpit is self-bailing. The pilothouse
offers standing headroom: 6' 2" in the middle (182 cm), the forward cabin
with two bunks has sitting headroom. There is room for a portable head
under the vee berth. A sturdy samson post is welded to the forward bulkhead.
method: The Novi 23 is a composite epoxy-fiberglass-plywood boat. The hull
is build around a simple plywood core sandwiched between layers of directional
fiberglass in epoxy. This method produces a high quality fiberglass boat
using methods within the reach of any amateur builder. The hull is assembled
on a simple jig made from the bulkheads, frames and some temporary molds.
a complete step by step description of the method here. The plans
show all necessary dimensions: all bulkheads, frames, molds and transom
dimensions plus accurate expanded plates dimensions for all hull panels.
No lofting, no need to measure from the jig as in plywood on frame construction.
We did all the calculations for you. The egg-crate structure is stronger
than traditional framing and the space under the sole, between the stringers,
can be filled with flotation foam to make the boat unsinkable.
cabin and pilothouse can be build from a sandwich composite if the builders
chooses that option.
There are several advantages to a foam sandwich superstructure. Lighter
topsides means better performance, improved stability and easier towing
on the road.
The plans show specifications for the two methods: cabin made of regular
plywood and epoxy and our sandwich panels. We can supply all the materials
for either method.
NV23 is easy to build: a plywood shell assembled the stitch and glue way
but fiberglassed on each side. No woodworking skills or special tools
are required. The plans include all dimensions and patterns to cut all
the hull parts flat on the shop floor. No lofting, no beveling, no scarfing:
the sides and bottom are cut from standard 4x8 plywood (122x244cm), joined
with a simple fiberglass seam. All seams are taped with fiberglass and
epoxy, see our "How To" section for details. These epoxy seams are much
stronger than the plywood. The NV23 is a large boat. She is not difficult
to build but we recommend to build a small boat first if only to become
familiar with the material and technique
There are so many possible options that we can not list them all.
outboard can be mounted as shown in a motor well or on a transom bracket.
show an open cockpit but the builder can easily add all kind of benches,
seats and other boxes.
is room for a small emergency outboard (kicker) on the transom.
plans show wide scuppers in the side but through transom scupper are
companionway can be left open or closed with doors.
pilothouse can be fully closed with fixed side windows or roll up plastic
windows can be used.
windshield can be hinged and lift.
and portholes are optional.
to the chain locker is shown from inside through a cut in the forward
bulkhead but the builder can also cut a deck hatch if he prefers.
capacity is ample with 42 gallons in one tank but there is room for
a second fuel tank.
NV23 can be made unsinkable with expandable buoyancy foam under the
sole and foam sheets glued under the gunwales for upright floatation.
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. Okoume or Meranti marine is preferred and cost starts at around
$50 per sheet (1/4").
the boat is fitted with an engine larger than 50 HP, the builder must
use marine plywood exclusively.
The plywood or foam for the pilothouse is not included in this BOM: add
3 to 4 sheets.
See our kits and add the cost of plywood bought locally.
The hull can be build in 80 hours but a finished boat will require 250
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 sides, bottom,
bulkheads, deck, floors and all parts from flat plywood sheets: no lofting,
no templates required.
Nesting drawings for the best plywood layout with numbered parts.
drawings showing assembly and parts numbers for small hardware.
Plan and Profile
Full Size Pattern - Side Panel Tip
Typical Small Boat Electrical
building notes for this boat.
files reference list and more.
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