Cape Dory 30 K Information, Review, Specs

Boat drawing
Make
Cape Dory
Model
30 K
Number Built
Production Year(s)
1976 - ??

The Cape Dory 30 K is a classic American cruising sailboat known for its robust construction and traditional lines. Designed by the prolific naval architect Carl Alberg and built by Cape Dory Yachts, the 30 K (Ketch) variant began production in 1976. It embodies Cape Dory's commitment to building seaworthy and reliable vessels, making it a popular choice for those seeking a sturdy cruiser with a comfortable motion in a seaway.

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The Cape Dory 30 K was introduced by Cape Dory Yachts in 1976, continuing the builder's tradition of producing classic, full-keel sailboats known for their durability. Andrew Vavolotis, the founder of Cape Dory, emphasized quality and durability, even establishing a marine hardware division, Spartan Marine, to ensure components met his high standards. Carl Alberg, the renowned Swedish-American naval architect, was instrumental in shaping the Cape Dory brand, designing numerous models including the 30 K. Alberg's design philosophy prioritized boats with long, graceful overhangs, low freeboard, and ease of handling, creating comfortable family cruisers and capable bluewater yachts rather than pure performance racers.

The Cape Dory 30, including the ketch variant, features a full keel with an attached rudder, a design characteristic of mid-20th-century naval architecture that contributes to directional stability. While originally offered as a ketch, the Cape Dory 30 was also available as a cutter (Cape Dory 30C) or a sloop rig, with the more efficient cutter rig becoming optional and even replacing the ketch in the middle of the production run.

Sailing Performance and Handling

The Cape Dory 30 K is renowned not for its speed, but for its solid, sea-kindly performance and exceptional stability. With a displacement of 10,000 pounds and a waterline length of 22.83 feet, its Displacement to Length ratio of approximately 375 indicates a heavy, traditional cruiser, built for comfort and safety in various conditions. This heavy displacement contributes to a smooth motion in a seaway, though it means the boat is generally considered "slightly underpowered" and "slow in light air."

The Ballast to Displacement ratio of 0.40, with 4,000 pounds of lead ballast, demonstrates a high degree of stiffness and stability, enabling the vessel to stand up to significant wind and maintain its composure. However, the Sail Area to Displacement ratio of approximately 12.55 suggests that the ketch rig, with its divided sail plan and inherent windage, may not offer spirited performance in lighter breezes. Owners have noted that the original ketch rig can have a lot of windage and relatively small, less efficient sails, sometimes leading to hard steering when reaching due to the attached rudder design. Despite this, the Cape Dory 30 K is recognized for its excellent righting capability if capsized, further solidifying its reputation as a safe and stable cruising platform.

Accommodations and Layout

While specific interior dimensions like maximum headroom are not detailed in the provided data, the Cape Dory 30 K is known for a minimalist yet functional interior that appeals to those with a more "Spartan spirit." Generally, Cape Dory models from this era feature solid construction with robust fiberglass layups, which extends to the interior. Typical layouts for a 30-foot cruiser of this vintage would include a V-berth forward, a head compartment, a salon with settees that can convert to berths, and a galley. The interior finish usually incorporates a good amount of wood trim, contributing to a classic, traditional feel. Based on owner discussions, issues with deck core and leaks from original deck fittings can be a concern on older models, potentially impacting interior integrity and requiring maintenance such as re-bedding.

Owner's Perspectives

Cape Dory 30 K owners consistently praise the boat's solid construction and its ability to handle rough conditions with a comfortable motion. Many appreciate its traditional lines and the sense of security it provides on the water, often citing its seaworthiness as a primary strength. The full-keel design, while contributing to stability, means that the Cape Dory 30 K is not a "flashy speedster" and can be slow in light winds. Owners frequently discuss the trade-offs between the ketch and cutter rigs, with some noting that the ketch's additional mast and rigging can make the already compact 30-foot interior feel smaller. Common maintenance points often revolve around issues typical of older fiberglass boats, such as deck core integrity and the need to re-bed original fittings to prevent leaks. Despite these considerations, the strong community of Cape Dory owners attests to the enduring appeal and robust nature of these classic American cruisers.

Measurements

Construction & Hull

Construction Material
Fiberglass (Solid)
Hull Type
Monohull Sailboat
Keel Type
Full
Rudder
1x —
Ballast
4000 lbs (Lead)
Displacement
10000 lbs
Water Capacity
60 gal
Fuel Capacity
20 gal

Engine

Engine Make
Volvo Penta
Engine Model
MD7A
Engine Type
Engine HP
13
Engine Count
1
Drive Type
Fuel Type
Diesel
Hover over a measurement
IJPE FS LOALWL

Rig & Sails

Rig Type
Ketch
P (Main Luff)
30 ft
E (Main Foot)
11 ft
I (Foretriangle Height)
33.75 ft
J (Foretriangle Base)
12 ft
Forestay Length (est)
35.82 ft
Main Sail Area
165 sqft
Foretriangle Sail Area
202.5 sqft
Total Sail Area (Reported)
434 sqft
Total Sail Area (Calc)
367.5 sqft

Dimensions

LOA
30.21 ft
LWL
22.83 ft
Beam
9 ft
Draft
4.17 ft
Max Headroom
-
Air Draft
38.5 ft

Calculations

Hull Speed
6.4 kn
Pounds per Inch Immersion
734.17