Friday, September 10, 2010

Design 2752 - 48' Modern Classic


Here's an exciting project right out of the box, on her shake down sail. Designed for an unnamed client, here are some interesting points about this design:

~ The hull and deck are 100% carbon fiber - hull is infused and the deck is of pre-preg construction.
~ Carbon rig is by Hall Spars.
~ Sails are by North.
~ The headsail is hydraulically furled. The main halyard is handled by a captive winch at the base of the mast, also hydraulic. The main sheet is controlled by a hydraulic cylinder under the deck. The only sheets handled manually are the various headsails including the cruising jib (103% LP), racing genoa (135% LP) and cruising gennaker as can be seen in the above image.
~ The boat is equipped with hydraulic in-boom furling.
~ The propulsion system consists of a custom hydraulic rotational sail drive that is controlled in tandem with the bow thruster by a proportional joy stick. The boat can turn 360° while standing in place.
~ The battery bank is lithium ion.
~ Interior is butternut with raised and fielded panels.
~ Every detail onboard is custom designed and fabricated from the pedestal, engine panel, hydraulic panel, retractable anchor arm, portlights, chocks, hand grabs, bow light, stern light, scupper plates and so forth to the interior woodwork.
~ The boat is fast.


The steering pedestal is of special interest. We placed the wheel forward of the pedestal so one doesn't have to reach through the spokes to use the navigation and propulsion controls. In addition to being practical the effect is stunning. Here's a computer rendering.


Here's a 3D rendering of the interior. As good as this rendering looks the interior looks even better in real life.


Here's a schematic explaining the propulsion system. In simple terms an auxiliary diesel engine powers a hydraulic pump which is close coupled to the engine which in turn powers the thruster, sail drive and main halyard winch. In silent mode the battery bank powers a DC power pack which in turn powers the sailing hydraulics. The system is designed for extensive silent running. A small generator is used to charge the batteries. (Double click for bigger view).


Image Courtesy of Cabot Lyman

Principal Dimensions
LOA 48'-0"
LWL 35'-5"
Beam 12'-0"
Draft 7'-0"

4 comments:

  1. Very nice indeed.

    ReplyDelete
  2. I liked the (Spirit 46) and then a mate put me on to this .I am sold
    Fresh layout but very little on the WWW about it ,
    Having none for sale on any sites new or used makes it hard to learn more about this modern classic...

    ReplyDelete
  3. Thank you for your comments. For additional information about the 48' Modern Classic, please contact our design offices at design@sparkmanstephens.com or call us at (203) 687-4700 or (401) 847-5449.

    ReplyDelete
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