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The process of determining the PHRF for an individual boat begins with the regional PHRF rating, then adjustments are made for the individual attributes of the boat such as: modifications to the rig, the size of the largest foresail (jib or genoa), the size of the spinnakers, type of keel (full, fin, wing etc.), the number of blades on the propeller, and the style of the propeller (fixed ...
A mainsheet is a line connected to the boom which allows a sailor to control the speed of a boat. The jib sheet attaches to the clew of the jib, and controls it. The jib has a sheet on each side, only one of which (the leeward one) will be in use at one time. The spinnaker sheet attaches to the clew(s) of the spinnaker, if carried. A ...
Each boat's time is adjusted with the formula, and then the adjusted scores are compared to determine the outcome of the race. For example, a PD Racer (a semi-open homebuilt class, and the slowest listed boat in the USA scheme) has a D-PN of 140, and an A-Scow (the fastest listed centreboard boat) has a D-PN of 61.3.
The sail plan may provide the basis for calculating the center of effort on a sailing craft, necessary to compare with the center of resistance from the hull in the water or the wheels or runners on hard surfaces. Such a calculation involves the area of each sail and its geometric center, referenced from a specific point. [4]
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To reduce the cost of owning a boat, consider buying a used boat in good condition. For instance, a new current-year Tahoe T16 bowrider is about $27,000. The same model a few years older is about ...
This index uses the arithmetic average of the current and based period quantities for weighting. It is considered a pseudo-superlative formula and is symmetric. [12] The use of the Marshall-Edgeworth index can be problematic in cases such as a comparison of the price level of a large country to a small one.
The Cruising Club of America (CCA) put together a technical committee that analyzed race boat data. They came up with the formula to compare boats based on readily available data. The CCA characterizes the formula as "rough". A lower value is supposed to indicate a sailboat is less likely to capsize. A value of 2 is taken as a cutoff for ...