General Concept
The Ocean Runner 49 is an adaptation of the smaller
semi-planing power yacht prototypes, Wave Runner
36 and Rhumb Runner 48, and of the very
similar but lighter and simpler Ocean Express 49.
The long fine run will yield excellent speed potential, and the relatively
short overhangs are intended maximize WL length for the maximum
accommodation space below.
The objective with the Ocean Runner 49 has been to create a
comfortable interior for a couple, including a second stateroom, but to stay
under 15 meters LOA for the sake of simpler ownership within the European
Union. The interior arrangement allows plenty of room for a couple and
occasional guests, plus a generous pilot house, galley, saloon, and cockpit
deck. The aft deck could be screened in if needed, or enclosed by
awnings. The large fore deck has a forward facing seat, right in front
of the Pilot House, and a well-deck for secure anchor handling.
With mast down, this
vessel is designed to pass through French canals, and with mast up, German
canals.
OCEAN RUNNER Particulars
49’ Moulded Length Overall
15’ – 8” Moulded Beam
47’ – 5” WL Length in the Half Load condition
Water Draft will be 5’ -9” in the
Half Load condition, depending on trim.
Air Draft will be 11’ – 4.25” in
the Half Load condition with the mast lowered, depending on trim (French
canal and bridge clearance).
Displacement will vary from
around 49,700# light to a full load capacity of 63,000# with tanks full,
stores for three people, and the boat ready for a long cruise.
OCEAN RUNNER will make use of active roll
stabilization using Naiad hydraulically actuated, gyro controlled
stabilizers.
Having been inspired by the general aesthetic and
functionality of working vessels, OCEAN RUNNER has high bulwarks,
substantial heavy duty rub rails, and all welded deck fittings, including
all welded stanchions, cleats, bitts, hawse holes, and anchor rollers.
In keeping with a commercial yet refined appearance,
the exterior aluminum surfaces will be sand
blasted with a fine sand sweep, but will
not be painted, except for anti-fouling on the hull. A vinyl accent color
stripe may be added per owner preference. Glass, hatches, doors and
other openings will be of a commercial standard, i.e. heavy duty.
Construction
Ocean Runner is designed for construction in aluminum.
All parts will be NC cut by plasma arc. The NC cutting process leverages the
work already done to create the computer model, allowing structure to be
easily defined directly from that computer model. The resulting "boat
kit" makes for very fast assembly. Once the parts have been pre-cut and
delivered, the frames and other internal structure are quickly erected, the
stringers placed, and the plating applied.
Power And Range
The displacement to length ratio shows the vessel to be fairly
light, consistent with the requirements of good performance. The
result is that "hull speed" will be in excess of 11 knots. For higher
semi-displacement speeds one could easily make use of 700 or more hp, which
would yield vessel speeds in excess of 17 knots (depending on loading and
other factors).
Although it is possible to apply sufficient power for true planing, if
that were to become the design goal, the hull form should be changed.
In other words, for true planing performance the hull would be given a run
that is considerably flatter, and there would be a wider transom.
A Hundested controllable pitch gear is provided, along with a Hundested
four blade controllable pitch propeller. This combination was chosen
in order to allow the "dual operating regimes" of high speed running, or low
speed long distance cruising. Use of a controllable pitch propeller
provides the ability to more fully load the engine during lower speed long
distance voyages, therefore to enable choice of engine rpm for the same
speed through the water.
Range under power is a matter of providing the required
fuel capacity for the preferred vessel speed and the intended destinations.
The Ocean Runner is designed to have a target range of 3,000 nm at between 7
and 8 knots
(for long ocean passages) with a 12% fuel reserve, and to be capable of 14
to 15 knots sustained cruise at shorter range.
Depending on sea state and other factors, an engine of
around 500 hp is expected to push Ocean Runner along at a top speed
of around 16 knots in the half load condition.
Interior
The layout below contains a large owner stateroom right
forward; a head and shower to starb'd; and a second stateroom to port.
A hallway is located slightly off center and leads aft to a stairway into
the pilot house.
The Pilot House is spacious, having a nav station
and piloting area forward plus a bench seat and table to port aft.
Below the Pilot House sole are the engine, machinery space, and bulk fuel
tanks.
Aft of the Pilot House, there is a Galley to port. A
large saloon is right aft. A door aft of the saloon leads to the aft
deck.
Design Summary
The intent of this design has been to fit the
maximum accommodations into a long distance combination cruiser under 50
feet LOA. Additionally, the requirement for excellent sea keeping has
encouraged keeping the cabins low.
This concept has also been developed into three
similar prototype designs. Among them, the
Coast Runner 48 and the Ocean Express 49
have virtually the same interior layout. The Coast Runner has a
slightly more working vessel style to the cabin structures. Both of those
designs have the layout below flipped port-to-starb'd.
The other prototype design is the
Rhumb Runner 48, which has a much different interior layout having a
much larger pilot house and two spacious, nearly equal sized staterooms.
For additional information on this vessel or any of
our other designs, please
inquire.
