An 18' 1" Knockabout
By William Atkin
A Family Sailboat
From many readers requests come for the design of a small, wholesome, and useful sailing boat; one in which the family can sail in comfort. In the past, designs have been produced of excellent small racing boats; these, however, while very satisfactory for agile youth, leave much to be desired in the matter of comfort and room for pleasant day-long sailing. And so for this group of sailing men unfolds another unit in MoToR BoatinG's fleet; by name, this time, Greenshank.

Greenshank is a centerboard boat; she is 18 feet 1 inch in overall length; 16 feet long on the water line; 6 feet 6 inches in breadth; and draws (with the board up) 1 foot 4 inches. With the centerboard down to its proper depth the draft is 3 feet 3 inches. The freeboard is generous; at the bow 2 feet 3 inches, at the stern 1 foot 8 1/2 inches, with the lowest point 1 foot 5 inches. So you see the little boat will be dry under severe conditions. Now this particular boat will require inside ballast. How much will depend upon the kinds of materials from which she is built and the amount of equipment carried. If Greenshank is built close to the lines indicated and with materials nearly as specified she should carry approximately 225 pounds.

Greenshank is rigged as a knockabout -- not a sloop. A knockabout carries mainsail and staysail; the stay for this sail extends from the stem head or, some point abaft the stem head to the mast. The rig as shown represents the utmost in efficiency combined with simplicity.

The cockpit is 9 feet 6 inches long; and well over 4 feet wide for nearly its full length. This gives room for side seats in addition to the center thwart. The thwart serves as a panting beam and support for the centerboard trunk as well. If, and this is likely, you should wish to remain aboard overnight, there is full length sleep-room both sides of the trunk. A canvas top spread over the boom and buttoned to the coamings; thus a snug tent, a place to sleep, a place to rest. What more can one ask of a little boat like this?

The lines show an easy form; excepting for the reverse curves through the after sections, sharp turns are avoided, all of which will be to the advantage of the steam bent frames. The keel is perfectly straight and sufficiently wide to accommodate the centerboard trunk as well as the heels of the frames that land each side of it. The centerboard trunk is always a weak spot unless the keel is wide and heavy. The sheer is easy, and the whole form such that frames and planking can be applied with a minimum of work. Greenshank is plainly constructed with suitable, but inexpensive, materials; and while not heavy is amply strong to give long service if properly cared for.

The underwater form lends itself to sailing in the shallowest water; and beaching without risk of damage. The latter is a feature of great convenience if the boat is to be hauled from the water for painting, simply lay planks and roll her out on wood or iron pipe rollers. The unusual breadth of the keel, and the fact that it is straight from end to end will keep the boat on an even keel during the hauling out process.

Plans for Greenshank are $100




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