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Herreshoff 28 1973 Ketch. Built to a modified design by a Master Ships Carpenter. African mahogany stripped plank hull on laminated ribs. Aluminum masts. 30 HP Atomic Four. Great Lakes sailed. Always stored inside. Asking $26,500. 419-206-5629 / H28Sweep.sale@gmail.com for more information
Equipment: Sweep is a Herreschoff 28 built to a modified design by a professional wooden boat builder and launched in 1973. One family owner. Stored inside near Cleveland, Ohio and sailed only in fresh water on the Great Lakes. The construction is concave/convex mahogany edge nailed and glued planking on laminated white oak and mahogany frames. Bronze fastenings throughout. Deck is marine plywood overlaid with fiberglass. Interior hull is lined with mahogany and spruce. Some restoration of the cockpit seat is complete. The bottom is not yet been painted for launch to aid in any marine survey the buyer may want. The H 28 is ketch rigged but can be sailed as a sloop. The owners normally sail the boat as a sloop. The mizzen mast is installed when it is entered for a once-a-year 30 mile race. If you are looking for a traditional wooden boat with some modern aspects (aluminum masts, fiberglass decks) this is a great boat to consider. Whenever, you enter a harbor, heads will turn and accolades are always communicated. The roller furling genoa makes getting ready to sail just that much easier. Although, the main sheet has a winch it has never been needed under any wind condition. This modified H 28 has superior sailing capability with much improved storage and living accommodations. Specifications: LO 30 LBP-33 (length between perpendiculars) LWL-28 Draft- 46 Beam-8 Displacement ≈ 8500 lbs. Cradle Overlapping bow pulpit arrangement so genoa does not break over lifelines. Modifications from the original H-28 design include: Raised the rig 4 to increase sail area for better light air sailing. Added a 3 bow sprit Adjusted the position of the masts to account for the new Center of Effort. Lowered the keel by 4 so draft is 4ft6in. Added a cabin house Enclosed marine Head Ice box with below deck and deck level access Sink and Stove Transom extended 2ft to add storage and enclose rudder GPS Atomic 4 Engine 30 HP Aluminum masts with internal halyards Roller furling Jib Intermediate headstay Other Sails: Main Jib sets on the intermediate headstay and Roller furling Genoa Mizzen and Mizzen Staysail Spinnaker Staysail and Symmetrical Spinnaker PHRF Rating 228
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)
Sloop or Ketch.
Some builders of this design, or it’s variants include:
Compass Yachts Ltd. (NZ) 1970-1984 FG (modified by John Lidgard)
Far East Boats Ltd.(Japan)
International Marine (Japan)
Cheoy Lee Shipyard (Hong Kong) BERMUDA 30
Walker Boat Co Ltd.(AUS)
Parkins Marine - Ft. Lauderdale, FL (USA)
Middleton Marine - La Crosse, FL (USA)
Gallart Shipyard (ESP)
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