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Hull Type: Full Keel Rigging Type: Cutter LOA: 30.21 ft LWL: 22.83 ft Beam: 9.00 ft Sail Area: 437 sf Draft: 4.17 Displacement: 10,000 lb Ballast: 4,000 lb S.A./Disp: 15.11 Bal./Disp: 40.00 Disp./Lemgth: 375.18 Comfort Ratio: 33.06 Capsize Screening Form…: 1.67 S#: 1.15 Construction: Fiberglass Ballast Type: Lead First Built: 1976 Last Built: 1987 # Built: 363 Builder: Cape Dory Yachts Designer: Carl Alberg Cape Dory 30 Specifications (cont.) Engine: Volvo Model: MD7A Type: Diesel HP: 13 Fuel: 20 gals I: 35.00 ft J: 13.25 ft P: 31.50 ft E: 13.00 Mast Height: 40.50 Forestay Length: 37.42 Water: 60 gals
Equipment: Sails & Canvas Mainsail 2 reefs, Dacron (2006) Mainsail Cover (new 7/2020) 4 part main sheet on traveler Headsail 120 % Dacron, with Sun Cover (2006) Alado roller furling Staysail Dacron (2006) Staysail # 2 (original) Free flying furler for Staysail # 2 (Schaefer) Drifter 140 % (2004) Free flying furler for Drifter (Harken) Spinnaker & sock (original) Dodger (restiched & repaired 7/1/2020) Lazy Jacks Bimini Full screens Tiller Cover (new 7/1/2020) Mainsail Cover (new 7/1/2020) Stern seats Cover (new 7/1/2020) Companionway cover Hatch Covers (2) Winch covers (new 7/1/2020) Sailing Hardware Tiller steering Monitor Windvane (with extrtas kit) Free flying furler Staysail # 2 Free flying furler - Back up Whisker pole 3; rigged to mast (2006) 3 Mast winches 2 cabin top winches 2 S/T primary winches Stairs on mast Anchor winlass (manual S-L Seatiger) Lifesling (kinda rough) 25 lb CQR 22 lb Danforth New lifelines with P/S gates 4 SS cowl vents Engine Volvo Engine removed for major repairs, new engine mounts, new water pump, etc (2014) Navigation & Electronics Icom 700 SSB with Dynaplate, 120 AT (Not installed) Raymarine Radar w/ 24 Dome & extra display Garmin GPS72H Icom VHF Stereo/CD/iPhone Dock with 2 speakers Navman Wind 3150 Navman Multi 3100 Navman Transducer Cabin Master Volt Charger (2018) New Batteries -3 (6/1/2020) CD curtains (look brand new) Blue cushions with white piping (very nice) Bulk head table Lee boards Port settee slides out to make bunk Teak hatch screens Bronze portlight screens Alcohol 2 burner cooktop Teak trim Interior finished with High Gloss Schooner varnish Air Conditioner H/W Heater (not installed) Exterior Bottom (2020) Hull painted with Awlgrip (2020) Topsides & Non-skid painted (2020) New teak eyebrow (2020) Exterior teaks finished with 10 coats Schooner varnish (2020) Rubber dinghy (Avon)
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)
(formerly listed as CAPE DORY 30 KETCH)
Also available as a cutter. (CAPE DORY 30C).
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