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1985 Lowell's Boat Shop Sailing Surf Dory

Listed

Seller's Description

A rare 1985 Lowell’s Boat Shop Sailing Surf Dory built to the highest specification by the legendary boat building shop in Amesbury, MA. This 18 foot gunter-rigged dory is built of mahogany over white oak frames; the garboard planks are marine plywood. Unlike many other traditionally built boats, this dory is epoxied to the waterline inside and out. No soaking necessary, just launch it off her trailer and go – you can truly have your cake and eat it too. The gunter and jib arrangement enables the sailing rig to be completely stowed within the boat beneath her custom sunbrella cover for easy transport. The freestanding mast is easily raised by one person and can be fully set up for sailing in less than 20 minutes. There is no boom, and therefore nothing to bonk you in the head while tacking a great boat for young families and advanced sailors alike. Her high gunter enables her to ghost along in light air while her proven dory shape makes her inherently seaworthy in rougher seas. She comes with an electric trolling motor in a dedicated well wired internally to a battery compartment amidships that will get you home at 3 knots if the wind dies completely. You may also row her from any of her three rowing stations; her original four Shaw & Tenney oars are included. Her steel centerboard raises and lowers easily and her rudder can be raised from a line within the cockpit, making it easy for her to float in several inches of water. The tanbark Anson sails are in very good condition. Stored inside during the off season. Cox trailer is included. Her finishes need attention, but she is structurally sound and complete along with all her original hardware: sail as is or bring her back to showboat condition with attention to her interior varnish and topsides. Email me for additional current photos.

Equipment: Minn Kota trolling motor; mounted hand pump bailer; fire extinguisher; anchor and rode; cox trailer; 4 Shaw & Tenney oars

Specs

Designers
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Builders
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Associations
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# Built
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Hull
Monohull
Keel
?
Rudder
?
Construction
?

Dimensions

Length Overall
18 0 / 5.5 m
Waterline Length
?
Beam
4 11 / 1.5 m
Draft
0 11 / 0.3 m
Displacement
?
Ballast
?

Rig and Sails

Type
?
Reported Sail Area
?
Total Sail Area
?
Mainsail
Sail Area
?
P
?
E
?
Air Draft
?
Foresail
Sail Area
?
I
?
J
?
Forestay Length
?

Auxilary Power

Make
?
Model
?
HP
?
Fuel Type
?
Fuel Capacity
?
Engine Hours
?

Accomodations

Water Capacity
?
Holding Tank Capacity
?
Headroom
?
Cabins
?

Calculations

Hull Speed
?

Hull Speed

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.

Formula

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

?
Classic formula: ?
Sail Area/Displacement
?

Sail Area / Displacement Ratio

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.

Formula

SA/D = SA ÷ (D ÷ 64)2/3

  • SA: Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
  • D: Displacement in pounds.
?
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
?

Ballast / Displacement Ratio

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.

Formula

Ballast / Displacement * 100

?
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
?

Displacement / Length Ratio

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.

Formula

D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

  • D: Displacement of the boat in pounds.
  • LWL: Waterline length in feet
?
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
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Comfort Ratio

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.

Formula

Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam1.33)

  • D: Displacement of the boat in pounds
  • LWL: Waterline length in feet
  • LOA: Length overall in feet
  • Beam: Width of boat at the widest point in feet
?
<20: lightweight racing boat
20-30: coastal cruiser
30-40: moderate bluewater cruising boat
40-50: heavy bluewater boat
>50: extremely heavy bluewater boat
Capsize Screening
?

Capsize Screening Formula

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.

Formula

CSV = Beam ÷ ³√(D / 64)

  • Beam: Width of boat at the widest point in feet
  • D: Displacement of the boat in pounds
?
<2: better suited for ocean passages
>2: better suited for coastal cruising

This listing is presented by SailboatListings.com. Visit their website for more information or to contact the seller.

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