San Juan 30 Information, Review, Specs

Boat drawing
Make
San Juan
Model
30
Number Built
360
Production Year(s)
1975 - ??

The San Juan 30, a performance-oriented sailboat, emerged in 1975 from the prolific design board of Bruce Kirby and the skilled craftsmen of the Clark Boat Company. Conceived as an International Offshore Rule (IOR) 1/2 ton racer, the San Juan 30 quickly established a reputation for speed and a lively sailing experience, embodying the builder's ethos of producing well-made, easily sailable vessels that offered solid value. A total of 360 units were built, solidifying its place in the competitive racing scene of its era and providing an engaging platform for sailing enthusiasts.

InfoView listings

The genesis of the San Juan 30 in 1975 placed it firmly within the popular IOR 1/2 ton racing class, a measurement rule that significantly influenced sailboat design during that period. Designer Bruce Kirby, already renowned for successful designs like the Laser and the San Juan 24, approached the San Juan 30 with a clear performance focus, aiming to create a competitive IOR racer. The Clark Boat Company, based in Washington, was known for its innovative adoption of fiberglass technology and a commitment to quality, hand-laid fiberglass construction, ensuring robust and durable boats.

During its production run, the San Juan 30 saw some variations to cater to different sailing preferences. A more racing-oriented version was offered, featuring a shorter coach roof, a longer cockpit, and a deeper keel, extending the draft from the standard 5.33 feet to 6.0 feet. A tall rig option was also available, increasing the "I" dimension (foretriangle height) from 38.5 feet to 39.5 feet and the "P" dimension (mainsail luff length) from 34.0 feet to 35.0 feet.

Sailing Performance and Handling

The San Juan 30's design ratios reflect its performance-cruiser aspirations. With a Sail Area to Displacement (SA/Disp) ratio of approximately 17.23, the boat demonstrates a good amount of sail power for its displacement, suggesting a responsive nature and respectable performance in lighter winds. Its high Ballast to Displacement (Bal/Disp) ratio, around 49.3%, indicates significant stability and stiffness, allowing it to stand up to a strong breeze without excessive heeling. The Displacement to Length (Disp/LWL) ratio of approximately 242.38 places it in the moderate category, balancing performance with a degree of seakindliness suitable for both racing and coastal cruising.

Equipped with a fin keel and a spade rudder, the San Juan 30 is noted for its splendid maneuverability. This configuration is characteristic of IOR-era racers, prioritizing agility and responsiveness, though some sources suggest that a fin keel might offer less directional stability compared to a full keel. The masthead sloop rig contributes to its sail-carrying ability. Owners frequently describe the San Juan 30 as a "very fast and fun to race" vessel, highlighting its engaging handling characteristics on the water.

Accommodations and Layout

While the San Juan 30 was designed with racing prowess in mind, it also offered a functional interior suitable for weekend cruising and short-term trips. The interior typically features an "open design philosophy" aimed at maximizing space. Forward, a V-berth provides sleeping accommodations for two. The main salon would traditionally include a dinette or settees, with a galley area that, while compact, usually offered basic amenities. Storage was often integrated throughout the cabin, utilizing available nooks and crannies inherent in a performance hull form. Original designs, however, might present some challenges; for example, one owner noted issues with the sink drain potentially clogging and overflowing into the bilge, and difficulty in easily installing an electric bilge pump, suggesting some limitations in the initial plumbing design. The general finish quality, in line with Clark Boat Company's reputation, would have been characterized by durable fiberglass construction, possibly with some wood trim, offering a practical and serviceable environment.

Owner's Perspectives

Owners of the San Juan 30 generally praise its sailing performance and robust construction. The boat is consistently noted for being "very fast and fun to race," reflecting its IOR heritage and Bruce Kirby's design intentions. Many appreciate the solid build quality characteristic of Clark Boat Company vessels from that era, providing a durable platform that has stood the test of time. For those looking for a boat with strong sailing characteristics and a lively feel at the helm, the San Juan 30 often exceeds expectations.

However, like many boats of its vintage, some common issues or areas for attention have been noted by owners. One recurring point, though specific, highlights potential drainage issues with the original sink plumbing, where a clogged drain could lead to water entering the bilge, and the original design did not always facilitate easy installation of modern electric bilge pumps. Additionally, as with any vessel over several decades old, general maintenance and potential refits of older systems, such as the Universal-Atomic 4 gasoline engine, are to be expected. Despite these potential considerations, a strong community of San Juan 30 owners often shares knowledge and resources, testament to the enduring appeal and value of this classic racer-cruiser.

Measurements

Construction & Hull

Construction Material
Fiberglass (Solid)
Hull Type
Monohull Sailboat
Keel Type
Fin
Rudder
1x Spade
Ballast
3550 lbs (Lead)
Displacement
7200 lbs
Water Capacity
20 gal
Fuel Capacity
17 gal

Engine

Engine Make
Universal-Atomic
Engine Model
Atomic 4
Engine Type
Engine HP
Engine Count
1
Drive Type
Fuel Type
Gasoline
Hover over a measurement
IJPE FS LOALWL

Rig & Sails

Rig Type
Masthead Sloop
P (Main Luff)
34 ft
E (Main Foot)
9.5 ft
I (Foretriangle Height)
38.5 ft
J (Foretriangle Base)
12.5 ft
Forestay Length (est)
40.48 ft
Main Sail Area
161.5 sqft
Foretriangle Sail Area
240.63 sqft
Total Sail Area (Reported)
402 sqft
Total Sail Area (Calc)
402.13 sqft

Dimensions

LOA
29.86 ft
LWL
23.67 ft
Beam
10.05 ft
Draft
5.33 ft
Max Headroom
-
Air Draft
-

Calculations

Hull Speed
6.52 kn
Pounds per Inch Immersion
849.98