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We purchased SV Emerald in 2019 and learned to sail on her in San Diego. After making the move to a larger cruising vessel, she is now available for sale. Her diesel engine has been replaced with a new Thunderstroke electric motor; she is very clean and in good shape with new sails, canvas, cushions inside and out.
She easily reaches speeds up to 5 knots under electric power alone. After a 1-hour electric trial run that included lots of fast accelerations and reverses, the batteries still had more than half of their capacity remaining. She was a racer with the Coronado Cays Yacht Club in her early years. Her original hull speed was calculated at 7.6 kn but we frequently saw higher speeds while safely under control. Without the diesel engine weighing her down, she moves very fast through the water.
Monthly dive services including hull cleaning, zinc replacements as needed and routine inspections completed since 2019.
Equipment: New 2019 - Bottom painted - Memory foam mattress V-berth - Interior and outside cushions New 2020 - Custom salon table of African Iroko hardwood - Mainsail Precision 400 Series Advanced Dacron 7 - Headsail Precision 400 Series Advanced Dacron 7 with Sunbrella UV Protection New 2021 - Prop shaft, propeller and PSS dripless shaft seal - Thunderstruck electric motor 10KW with gear reduction - ProTournament 360 4-bank professional grade marine battery charger - 4 propulsion batteries Lifeline 12v 125 AH sealed AGM (48v 125 AH for motor) - Canvas sail and wheel covers - 2 house batteries Powerstride 12v 75AH sealed AGM (12v 150AH house) - Traveler lines and hardware - Mainsheet lines and hardware - Dock lines - Winches self-serviced General - Tohatsu 4-stroke 6 hp outboard extra long shaft, external fuel tank - Pedestal-mounted compass - Galley stainless sink, ice box - Undercounter cabinet space for microwave (not included) - Head stainless sink, mount for camp toilet; a cassette toilet is available if wanted - Original holding tanks/hoses removed - Anchor with chain and line rode - Navigation and anchor lights operational - Safety: 4 fenders, 8 personal flotation devices, 1 throwable flotation device, 2 fire extinguishers with current certification, required flares Deck - Very good shape, waxed and detailed 2022 - AC shore cord, inlet and connections in good shape - Teak handrails and companionway guides recently varnished - Stainless bow pulpit, stern pulpit and stanchions - Wheel is on pedestal - Stainless swim ladder available (not attached)
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)
Also offered with a deeper keel. (DRAFT: 5.50’/ 1.68m)
Std. rig after Hull# 15:
I: 40.00’ / 12.19m
J: 12.70’ / 3.87m
P: 35.00’ / 10.67m
E: 9.80’ / 2.99m
Shorter rig:
I: 37.00’ / 11.28m
J: 12.70’ / 3.87m
P: 32.50’ / 9.91m
E: 10.80’ / 3.29m
Listed displacement not consistent.
Not to be confused with the later SANTANA 30-30, an entirely different design.
This listing is presented by SailboatListings.com. Visit their website for more information or to contact the seller.
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