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Probably one of Rob Balls best designs, the C&C 38-2 has been cruising and winning PHRF races up and down the East Coast since it’s introduction back in 1975. Known for the fact the hull is solid fiberglass, this design has survived it’s later sister-ships with cored hulls. Sea Hawk jib and main sails have been serviced a month ago and she is ready for her next offshore or coastal adventure.
Equipment: Yanmar 3JH2E 38 HP. Sea Hawk sleeps seven (7) large double berth in bow, pilot berth, two settees, large double quarter berth to port; head with sink, shower, hot and cold pressure water. Extra large chart table. Teak and holly cabin sole. Electronics Garmin Chart Plotter B&G Triton Autohelm Autopilot Standard Horizon VHF CD-FM-AM Electrical Bran new 3 Batteries 12 volt DC ships systems 110 volt AC shore power
The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.
Classic hull speed formula:
Hull Speed = 1.34 x √LWL
A more accurate formula devised by Dave Gerr in The Propeller Handbook replaces the Speed/Length ratio constant of 1.34 with a calculation based on the Displacement/Length ratio.
Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio.311
Hull Speed = Max Speed/Length ratio x √LWL
A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.
SA/D = SA ÷ (D ÷ 64)2/3
A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.
Ballast / Displacement * 100
A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.
D/L = (D ÷ 2240) ÷ (0.01 x LWL)³
This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.
Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam1.33)
This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.
CSV = Beam ÷ ³√(D / 64)
Most of changes made on the C&C 38-2 over the earlier model involved IOR optimization.
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