by Bruce N. Crandall
LOA 15' 1", BEAM 76",DRAFT 9", DISPLACEMENT 1266 LBS.
Sheet plywood can more than hold its own when it comes to a design offering both speed and load carrying ability.
Here is a new design that offers a remarkable combination of speed with soft riding and load-carrying ability. It is a convex-V-bottom, developable-surface, high-speed type designed for planing speeds in rough or choppy waters. Large nontrip chines, extra beam and flare and good banking and handling characteristics make it exceptionally safe for its size. This boat features a somewhat new type of soft-riding, high-speed bottom design, which was developed as a result of a certain amount of experimentation and model testing. As compared with my previous, semiround, high-speed bottom designs, it represents an attempt to increase the boat’s efficiency as much as possible with a heavy load, and also at low planing speeds, without affecting its efficiency at higher planing speeds or interfering with the soft—riding or handling characteristics. The performance of the test boat was very gratifying, as it tended to uphold all of my theoretical decisions. The water breaks completely clear at the bevel chine at all normal planing speeds and does not even touch the spray rails except in rough water or with a heavy load. The surfaces formed by the bevel-chine planks add extra buoyancy and stability in displacement condition and extra planing surface for quick planing even with a load; after planing speed is reached, they ride entirely clear and cause no drag. The test boat was run all summer with a 65-hp motor, which I considered to be about average, in power and weight, of the motors with which the design will be used. It was tested under all loads and many water conditions and was run at full speed through all kinds of wakes, to see if any possible flaws could be found in the design. The results were so satisfactory that I intend using the same basic bottom lines for several new plans in the future.
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