Sarum 30 — Information, Review, Specs

1978·BACO Aluminium (Ravensbourne) Ltd.
Approximate drawing

Hover a measurement to read its value

Hull type
Monohull · twin
Rig
Masthead Sloop
LOA
29.99' · 9.14 m
Displ.
7,275 lbs · 3,300 kg
First year
1978

The Sarum 30 is a robust, bluewater capable cruiser designed by the influential British naval architect Robert Tucker. Conceived during an era when amateur and semiprofessional metal boatbuilding was at its peak, the Sarum 30 was a sophisticated progression from Tucker’s earlier plywood and GRP successes. Most notably, the model served as a technical showcase for aluminum alloy construction, with several hulls commissioned by the British Aluminium Company to demonstrate the material's viability for smallship production. Built using a radiuschine or multichine method—which avoids the "boxy" appearance of traditional hardchine steel boats—the Sarum 30 offers a level of structural integrity and seakindliness that has earned it a devoted following among longdistance sailors. While less common than its smaller sibling, the Sarum 28, the 30foot variant provides the extra waterline and volume necessary for extended liveaboard voyaging. Detailed historical context for this lineage can be found at Tucker Designs, which maintains the archives for the designer’s diverse portfolio of offshore vessels.

Measurements

Dimensions 01

LOA
29.99 ft
LWL
21.75 ft
Beam
10.01 ft
Draft
4.27 ft
Max headroom
6.07 ft
Air draft
-

Construction & hull 02

Construction
Aluminum
Hull type
Monohull
Keel type
Twin
Rudder
1× —
Ballast
3300 lbs (Iron)
Displacement
7275 lbs
Water
-
Fuel
-

Rig & sails 03

Rig type
Masthead Sloop
P · main luff
-
E · main foot
-
I · fore ht.
-
J · fore base
-
Forestay (est)
-
Sail area
-

Calculations 04

SA/D ratio
Ballast/Disp.
45.36
D/L ratio
315.65
Comfort ratio
21.58
Capsize screening
2.07
Hull speed
6.25 kn

Sailing Performance & Handling

The Sarum 30 is fundamentally a heavy-displacement cruiser that prioritizes stability and tracking over light-air finesse. With a hull form often constructed in 5mm to 8mm aluminum or steel plating, the boat possesses significant momentum. On the water, this translates to a "sea-kindly" motion; she does not bounce or shudder in a chop but rather drives through it. According to accounts from owners of the Sarum series, the boat "likes a bit of wind" and typically requires a Force 4 breeze to truly come alive.

Under sail, the boat is often found in two configurations: a deep fin keel for better windward performance or a twin-keel (bilge keel) setup for tidal drying. The twin-keel versions are surprisingly balanced but do suffer from a higher wetted surface area, which can hinder speed in ghosting conditions. Steering is generally heavy but predictable, and the boat’s natural tracking ability makes it an excellent candidate for windvane self-steering. While it will never win a round-the-buoys regatta, the Sarum 30 provides a secure and dry platform when conditions turn foul, a trait inherited from Robert Tucker's experience in designing lifeboats and commercial craft.

Interior Comfort & Variations

Because the Sarum 30 was frequently sold as a hull-and-deck package for owner completion, the interior quality and layout vary significantly from one vessel to another. However, the designer’s original intent provided for a traditional and functional offshore layout. A typical configuration includes a V-berth forward, a central salon with a folding table, a compact L-shaped galley, and a dedicated navigation station.

The use of aluminum or steel in the hull allows for a slightly beamier feel than equivalent GRP boats of the 1970s, as the thinness of the hull plating (compared to thick fiberglass) creates more usable internal volume. Headroom is generally generous for a 30-footer, often exceeding six feet in the main cabin. Sibling models, such as the Sarum 28, were noted for their "roomy" interiors for their size, and the 30-foot version capitalizes on this with additional storage and more spacious quarter-berths. Prospective buyers should note that professional fit-outs by yards like Avon Brunel Marine will feature high-quality joinery, whereas amateur builds may range from functional marine-grade plywood to less sophisticated materials.

Known Issues & Buyer’s Checklist

The primary concern for any metal boat is the integrity of the hull and the prevention of electrolysis. Buyers must prioritize a specialized hull survey using ultrasonic thickness testing to ensure no significant thinning has occurred, particularly in the bilges or near the waterline.

  • Electrolysis & Anodes: On aluminum versions, dissimilar metal corrosion is a major "gotcha." Inspect all through-hull fittings to ensure they are properly insulated from the hull. Rapid anode depletion is a common sign of electrical leakage or poor marina grounding.
  • Insulation & Condensation: Metal hulls are prone to "sweating" in colder climates. Check that the insulation (typically closed-cell foam) is intact and covers all exposed metal surfaces to prevent mold and interior rot behind the cabinetry.
  • Keel-to-Rudder Balance: On twin-keel models, some owners have reported that the boat can sit back on its rudder when drying out if the load is not perfectly balanced. Inspect the rudder pintles and gudgeons for signs of stress or bending.
  • Deck-to-Hull Join: On older models, check the stanchion bases. If stainless steel fittings were bolted directly to an aluminum deck without an isolating gasket, galvanic corrosion can cause bubbling and structural weakening at the mounting points.

Community & Resources

The Sarum 30 benefits from the shared knowledge base of the Robert Tucker community. The most prominent resource for technical data and design history is the official archive at Tucker Designs. Additionally, owners of the Sarum 28 and 30 often congregate within broader UK-based metal boat associations and the "Sarum Owners" groups on technical sailing forums to share advice on cathodic protection and hull maintenance.

The Verdict

The Sarum 30 is a "tank" of the sailing world—a rugged, dependable cruiser for the sailor who values safety and longevity over modern aesthetics and speed.

Pros:

  • Exceptional structural strength, particularly in aluminum or steel.
  • Sea-kindly motion that remains comfortable in heavy weather.
  • Generous interior volume and headroom for a 30-foot vessel.
  • Versatile keel options for tidal or deep-water cruising.

Cons:

  • Requires vigilant maintenance to prevent galvanic corrosion.
  • Sluggish performance in light winds due to heavy displacement.
  • Interior quality is highly variable depending on the original builder.

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