Category The Model Engineer and Amateur Electrician

The sail area is measured in many ways, and, however simple the arrangements are, reformers will arise occasionally with suggestions with an unintentional view of complicating matters. The method recommended by the Y.R.A. is simple
and let it be adhered to without question.

First take the weight, then place model in the tank, and see that the water is well over the upright G (Fig. 4). By use of the cock, the water level can be regulated to the fraction of an ounce.

Theoretically, the idea is both simple and
scientifically sound. It is to harness the rudder of a model to an adjustable vane at the masthead in such a way that the vane will turn the rudder, when forced itself to turn by the wind, the reverse way to that in which the vane rotates.

No doubt if one had Mr. Daniels’ experience, and his brains as well, they would be definite instructions rather than hints, and the art of designing a yacht would become the practically pure geometrical exercise he maintains it to be.

Herreshoff, in his usual way, eviscerated the rule and took those elements and those only that counted. A canoe body to run over the water—the exact amount of lateral resistance needed for the S.A. in
the form of a metal fin—the lead disposed in the most effective form at the lowest point in the forms of a torpedo halved and bolted on the bottom of the fin. Such was the Wee Win.

The hull of a yacht is represented by three sets of lines, which are known as the cross-section or body plan, water line plan, and buttock line elevation. Any line that is a curve in one plan is always a straight line in the other two.
If the intersection of these lines coincide in all these drawings the shape of the hull must of necessity be fair in curvature, 7.¢., free from bumps, always, of course, providing the curves in the plans are not
unfair.

Messrs. Bassett-Lowke Ltd., Northampton, just placed upon the market a complete set of finished fittings suitable for the highest class model racing yacht. The set comprises: Automatic sheet tiller with rapid tensioning device; improved pattern
gooseneck and boom socket; Archer pattern gaff jaw; spinnaker boom socket set; sheave blocks; special main sheet adjuster; set of single and double anti-fold shroud plates, with hooks and special safety sheet hooks; set of six sheave blocks.

In the up-side-down way the builder has to get a plank to build his boat on. Now, to build a boat the size of this schooner he would require a plank about 5 ft. long by about 12 ins. wide to set up his moulds on.

Materials: For the stem, keel and general framework, birch is as good as any timber. The knees and fittings are best made from holly or some fruit tree, such as apple or pear, the knees being naturally grown. For the ribs either Canadian cheese tubs, which can be bought at any grocer’s for a few pence, or hazel rods split down and planed to thickness, are as good as anything.