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Copyright 2012 Michael Kasten, Kasten Marine Design, Inc.
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The 41' Ketch

'JASPER'

41' Ketch - JASPER - Kasten Marine Design, Inc.
Preliminary Sail Plan  |  Larger Aft View  |  Side View Above  |  Forward View

Copyright 2011 Michael Kasten

The Concept

The 41' JASPER prototype shown here is a motor-sailing yacht intended for ocean voyaging and canal cruising.  Steel or aluminum would be very suitable construction materials.  The rounded hull shape is designed for easy construction with forming needed on only about 8% of the plating.  

At 41' on deck, the boat is large enough be able to carry a flush fore deck and still have headroom below.  This produces an extremely strong deck structure that is very simple to build.  Due to the added freeboard, it also provides a much greater range of positive stability and reserve buoyancy than the usual trunk cabin arrangement.
 

The Interior

An interior layout has been planned but has not yet been drawn.  The layout is planned for comfortable living aboard for a couple, with space to sleep two guests below plus two more on occasion in the pilot house.   A walk-through of the interior is as follows, starting forward. 

The forward cabin is the owner's sleeping cabin, and is planned to have an "island" type of double berth on center, with a walk-around at the foot of the berth and a generous hanging locker / bureau to each side.  Aft of that, amidships there are two wide settee-berths that function as saloon "sofas" with a coffee table in between.  Aft of the saloon is a galley to port, and a head compartment and shower to starb'd. 

Aft of the galley / head is the engine room bulkhead, and a ladder on center leading up to the pilot house.  Below the pilot house is the engine room, with a generous amount of space for machinery, and a seat surrounding the engine for easy servicing and maintenance.  Above that within the pilot house, there is a cockpit / footwell on center with cushioned seats on each side that double as added guest sleeping accommodations. 

The aft deck is intended to have a welded pulpit with a wrap-around seat and small table on center for comfortable on-deck dining while dockside, and for wake watching under way...

The fore deck is flush, extending from one side to the other at the height of the bulwark top.  This arrangement provides for a wide and open interior, since there is no walkway on deck to cut into the wide expanse of headroom.
 

Particulars

The Rig

The ketch rig was chosen for its ocean cruising benefits, to yield a generous sail area, to provide a variety of well-balanced sail combinations, and to keep the sails to manageable sizes.  The mains'l - the largest sail - is well inboard where it can be handled with ease.  Our Preliminary Sail Plan shows a target sail area of approximately 1,000 sq ft.   Being a prototype, other rig / keel / interior combinations would be equally possible.

For more information, please inquire.
 

Please see the Plans List page to review our available Boat Plans.

Home  |  Intro  |  Custom Yacht Design  |  Stock Designs  |  Motor Yacht Gallery  |  Sailing Yacht Gallery  |  Prototypes Gallery  |  Plans List
Articles  |  Our CAD Design Stream  |  MAXSURF For Marine Design  |  News..!  |  Design Team  |  Site Map  |  Site Search  | Contact Us