Messing about in boats since 1975.  Online Since 1997.

Kasten Marine Design, Inc. Logo - Copyright 2017 Michael Kasten

Home  |  Intro  |  Our Design Process  |  Stock Design Info  |  Motor Yacht Designs  |  Sailing Yacht Designs   |  Prototype Designs
Plans List  |  Articles  |  Our CAD Design Stream  |  Maxsurf  |  News..!  |  SITE MAP..!  |  Site Search  | Design Team  |  Contact Us

Please see the  AVAILABLE BOAT PLANS web page

The 42' Ketch


42' Ketch LUCILLE - Kasten Marine Design
Sailing Perspective Aft | Sailing Perspective Fwd | Sailing Perspective Side
Interior Cutaway View | Aft View of Hull | Fwd View of Hull

Sail Plan | Deck Plan | Interior Layout

Copyright 2015 Michael Kasten

The Concept

A smaller sister to the 50' Motor Sailing Schooner Lucille, the 42' ketch LUCILLE shown here has been designed as a motor-sailing yacht suited to ocean voyaging and canal cruising. The name is inherited from the larger vessel due to the hull form of both designs being nearly identical. Differences are primarily the size, the rig, and the profile, all of which have been borrowed from my 42’ ketch design, Zephyr.

As a result, the LUCILLE 42 is actually a combination of three designs: the hull shape came from the 50' Lucille, the profile and sail rig came from the 42' Zephyr, and the interior layout came from the Roberta Jean 43.

Aluminum has been chosen for the hull, deck and house structures. A rounded hull shape was preferred, which has been designed for easy construction. Forming will be needed only on some 8% to 10% of the vessel's plating.

The Interior

As with the Roberta Jean 43, the layout has been planned for comfortable living aboard for a couple, with space to sleep two guests below plus two more on occasion in the pilot house. In this case, the layout has been adapted to a hull form that is well suited to sailing. Please see the Interior Layout drawing below in order to follow along with the interior description.

Starting forward, we have the owner's sleeping cabin where an "island" type of double berth is located on center. This allows a walk-around at the foot of the berth and a generous hanging locker / bureau / shelf system on each side. Aft of the owner's cabin we enter the saloon amidships where we have two settee-berths that function as saloon "sofas" with a table in between. Aft of the saloon is the galley to port, and the head / shower to starb'd.

Aft of the galley / head area is the engine room bulkhead. A ladder on center leads up a few steps into the pilot house. Below the pilot house is the engine space, with a generous amount of room for machinery above the fuel tanks outboard, and a seat aft of the engine for easy servicing and maintenance.


42' Aluminum Ketch LUCILLE - Kasten Marine Design, Inc.

The Deck Plan

Within the pilot house there is a dinette which surrounds a foot-well on center, as shown on the Deck Plan below. The dinette has cushioned seats all around. With the dinette table lowered to fill the space above the foot well, there is sleeping for an additional couple in the pilot house. With two hearty souls on the aft deck seating, that brings the sleeping quota to eight...! This is good for an occasional party or brief one-night camp-out, but it is too many for an extended cruise therefore it just would not do to make such a large crowd too comfortable..!

The aft deck has a welded pulpit with wrap-around seating. The helm and binnacle are on center, affording a good view of the sails. On the aft face of the pilot house is an aft facing seat for wake watching under way, and is also a good spot for sleeping outside. Right aft of the aft-facing seat is a fold-down table for easy on-deck dining.

A side deck extends along each side of the pilot house and forward cabin trunk providing a secure passage forward. Right forward on deck is a windlass and mooring bitts - a safe area from which to handle the ground tackle.


Lucille 42 - Aluminum Ketch - Kasten Marine Design, Inc.



Propulsion System

Being a full blooded motor-sailing vessel, the emphasis has been 100% / 100%. In other words, fully capable as a motor yacht and as a sailing yacht. The engine is a Volvo Penta which develops 75 horsepower at 2500 rpm.

A fully feathering controllable pitch propeller is used, so that the prop does not contribute appreciably to resistance while sailing, and so that the synergy of actual motor-sailing can be taken advantage of when conditions favor by adjusting the pitch to suit the conditions.

Per the Beebe algorithm for calculating range under power, using the half load condition with 450 US gallons of fuel and a reserve of 15%, range is assumed to be 3,000 NM at 6 knots; 2,400 NM at 6.5 knots; and 1,800 NM at 7 knots. Given that there is a fully capable sailing rig, range is effectively unlimited.

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 each of the sails to a manageable size. The mains'l - the largest sail - is well inboard where it can be handled with ease. Our Preliminary Sail Plan Rendering shows a sail area of close to 1,200 sq. ft. in the working sails, and just over 1,400 sq. ft. with the mizzen stays'l included.

As planned, the rig is very much the same as has been given to four other designs, the 36' Grace, the 42' Zephyr, the 43' White Buffalo, and the 56' Shiraz.

Very nice indeed...!

42' Ketch Lucille - Kasten Marine Design

For more information, please inquire.