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Bristol 47.7 for sale by owner. SPRAY is a beautiful example of a long distance cruising sailboat. She is well equiped and ready to go.
Equipment: Specs and Equipment Dimensions LOA 47 ft Beam 13 ft 2 in Draft (board up) 4 ft 11 in Draft (board down) 11 ft 0 in Displacement 34660 lbs Ballast 15000 lbs Power Westerbeke 70 hp Diesel fresh water cooled (3783 hrs) 7.5 kw Generator powered by 30 hp Westerbeke Diesel (2193 hrs) Tankage Fresh water 180 gallons Fuel 150 gallons Holding tanks 40 Gallons Accommodations Number of Double berths 3 Number of cabins 3 Number of heads 2 Sails and rigging Quantum mainsail 1998 (on Hood Stowaway mast Precision 150% Genoa 2019 Quantum Storm trysail 2000 (never flown) Hood staysail 1996 Harken roller furling headsail Hood spinnaker Inner forestay with Hyfield quick release lever Inboard and outboard genoa tracks Harken traveler aft of helm Deck Equipment Lewmar Electric #65 ST primary winch Lewmar #48 ST @ outhaul Lewmar #46 ST Lewmar winches on mast. Dinghy Davits Custom swim ladder on moveable track Ideal electric windlass Bruce 66 kilo anchor with 300 ft chain. (chain 2021) 45 lb CQR anchor 50ft chain rode and 200ft of line Two anchor rollers Anchor well in foredeck Washdown pump at bow with switch at helm Two lazarette lockers on aft deck Double SS bow and stern rails Double lifelines on SS stanchions Boarding gates port and starboard Electronics Garmin GPS and Radar w/wifi (2021) Robertson Autopilot Ritchie compass ICOM M402 VHF radio w/cockpit remote Miscellaneous Spectra water maker 380C (1999) Lifesling Attachments for safety harness in cockpit and jacklines on deck Sixteen opening ports with screens (replaced 2017) 3 zone heat and air conditioning Grunert cold plate refrigeration with separate freezer
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)
Center and aft cockpit versions.
Based on the BRISTOL 45.5 with traditional counter.
Bristol’s of this size and vintage were built on a semi-custom basis so particulars vary.
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