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Hull speed or displacement speed is the speed at which the wavelength of a vessel's bow wave is equal to the waterline length of the vessel. As boat speed increases from rest, the wavelength of the bow wave increases, and usually its crest-to-trough dimension (height) increases as well. When hull speed is exceeded, a vessel in displacement mode ...
The boat has a draft of 5.00 ft (1.52 m) with the standard keel and is fitted with a diesel engine of 15 hp (11 kW) for docking and maneuvering. [ 1 ] [ 2 ] The design has a hull speed of 7.76 kn (14.37 km/h).
It has a draft of 5.33 ft (1.62 m) with the daggerboard down and 1.25 ft (0.38 m) with the daggerboard up. The boat has a PHRF racing average handicap of 222 with a high of 258 and low of 198. It has a hull speed of 6.5 kn (12.04 km/h). It was replaced in production by the centerboard-equipped MacGregor 26S in 1990. [1] [2]
In particular, any "displacement" or non-planing boat requires much greater power to accelerate beyond its hull speed, which is determined by the length of the waterline, and can be calculated using the formula: Vmax (in knots) = square root of LWL (in feet) x 1.34. The hull speed is the speed at which the wavelength of the bow wave stretches ...
Following the Coast Guard custom in place in 1960 of not naming vessels under 100 feet in length, the first 44 Point-class patrol boats were only identified by their hull number using the scheme of WPB-823xx, where 82 was the design length of the hull. [2]
The boat has a draft of 5.67 ft (1.73 m) with the centreboard extended and 1.50 ft (0.46 m) with it retracted, allowing beaching or ground transportation on a trailer. [ 1 ] The boat is normally fitted with a small 3 to 6 hp (2 to 4 kW) outboard motor for docking and maneuvering.
This model was introduced in 1971 and ten were built before production ended in 1973. It has a length overall of 43.33 ft (13.2 m), a waterline length of 39.17 ft (11.9 m) and a beam of 13.92 ft (4.2 m). The boat has a draft of 3.50 ft (1.07 m) with the standard keel and a hull speed of 8.39 kn (15.54 km/h). [2] [5] Gulfstar 43
The boat has a draft of 4.67 ft (1.42 m) with the daggerboard extended and 12 in (30 cm) with it retracted, allowing operation in shallow water, beaching or ground transportation on a trailer. [1] [2] The design has a hull speed of 6.51 kn (12.06 km/h). [2]