Design Brief & Intent 2
The Kaiulani 38 was designed from its inception to be an uncompromised, go-anywhere blue-water voyager. While many steel boats of the era suffered from the harsh, angular aesthetics of flat-plate chine construction, Brewer addressed this with his pioneering radius-bilge plating technique. This method utilizes a large-radius curve along the turn of the bilge, resulting in a fair, smooth hull shape that mimics the sweet lines and reduced drag of a molded fiberglass hull while retaining the extreme puncture and abrasion resistance of high-tensile steel.
The structural blueprint of the Kaiulani 38 is exceptionally robust, relying on closely spaced longitudinal steel stringers welded over widely spaced athwartship angle frames. This creates an incredibly rigid framework that distributes rigging and impact loads evenly across the hull. When compared to fiberglass production contemporaries like the Tayana 37 or the Valiant 40, the Kaiulani 38 offers a level of collision survivability that no composite hull can match—ideal for navigating ice-strewn northern waters or poorly charted tropical reef systems.
The interior of the Kaiulani 38 reflects the needs of a crew living aboard for months at sea. Brewer rejected the open-concept layouts popular in modern charter-focused boats, opting instead for a traditional three-cabin layout that provides genuine privacy. Featuring two private double staterooms (a V-berth forward and a generous quarter berth cabin aft), the layout also includes a secure pilot berth and two deep settee berths in the main saloon. Woodwork is typically finished to an exceptional standard, with varnished teak and ash joinery, custom cabinetry, and heavy grab rails throughout. Cruising amenities include a spacious, wrap-around U-shaped galley designed to keep the cook secure in a seaway, a dedicated forward-facing navigation station, and a head compartment featuring a genuine separate stall shower.
Variations & Configurations
Because the Kaiulani 38 was built on a custom and semi-custom basis, as well as by ambitious home builders, configurations can vary slightly from hull to hull. While the vast majority of these vessels were built with an all-steel hull and deck structure, a few custom iterations featured steel hulls paired with aluminum deckhouses and coamings. This hybrid construction, though more complex due to the requirement for specialized bimetallic transition joints to prevent galvanic action, effectively reduced topside weight by roughly half, lowering the vessel's center of gravity and enhancing ultimate stability.
The standard rig is a classic, keel-stepped cutter configuration supported by double spreaders, double lower shrouds, and intermediate running backstays. This heavy-duty rig breaks the total sail area down into smaller, highly manageable pieces, allowing a shorthanded crew to quickly adjust the sail plan to changing conditions. Draft is typically moderate, drawing between 5 feet and 5 feet, 4 inches depending on the loaded cruising weight, which strikes a practical balance between entering shallow anchorages and maintaining windward tracking. Ballast is integrated internally, with cast lead or iron sealed directly within the steel keel cavity, eliminating the vulnerability of external keel bolts.
Sailing Performance & Handling
With a displacement of 20,500 pounds and a waterline length of 31 feet, 4 inches, the Kaiulani 38 possesses a Displacement-to-Length (D/L) ratio of 297.59. This puts the boat firmly in the heavy displacement category, which translates to a highly stable, momentum-driven ride. Rather than launching over steep head seas and slamming down into the troughs, the Kaiulani 38 uses its mass to slice through waves with a minimum of fuss.
Its Sail Area-to-Displacement (SA/D) ratio of 15.91 reflects a conservative, safety-first sail plan. In light air (under 10 knots), the heavy hull requires a light-air reaching sail to maintain competitive speeds. However, when the wind rises above 12 to 15 knots, the hull finds its stride, displaying a stiff, powerful tracking ability that keeps the deck dry and the helm remarkably light. This stability is mathematically reinforced by a Capsize Screening ratio of 1.73 and a Comfort Ratio of 35.39, indicating that the boat will exhibit a slow, predictable motion in heavy weather, vastly reducing crew fatigue on long passages.
A major contributor to the boat’s handling is Ted Brewer’s signature full keel design, which features a cutaway forefoot and a distinct "bite" out of the aft deadwood. This "Brewer Bite" significantly reduces wetted surface area compared to a traditional full keel, while keeping the propeller protected in an aperture and the rudder hung on a robust structural steel skeg. The result is a boat that tracks like an arrow on ocean passages yet remains surprisingly maneuverable in tight marina slips, capable of turning in a much tighter radius than a standard full-keel cruiser.
Known Issues & Triage
The primary threat to the longevity of any steel yacht is corrosion, and the Kaiulani 38 is no exception. Prospective buyers must recognize that steel hulls rust from the inside out. The most critical maintenance area is behind the interior joinery and under the hull insulation. In older builds where low-density fiberglass batting was used, condensation easily forms between the insulation and the cold steel hull plate, trapping moisture and causing silent, unseen rust. Triage requires performing a comprehensive ultrasonic audio-gauging survey of the entire hull to measure plate thickness and confirm that the original structural margins remain intact.
Other common target areas for corrosion include the chain locker, where salt water dripping from the anchor rode can pool and strip away coatings, and the deck-to-hull joints. If a Kaiulani 38 was fitted with laid teak decks over a steel substrate, this is a significant liability. Water inevitably penetrates the bedding compound or screw fasteners over time, leading to severe crevice corrosion of the underlying steel deck plates. If the teak deck is soft or lifting, the only long-term fix is to completely strip the wood, grind and repair the steel deck plates, and apply a modern epoxy barrier coat and non-skid paint.
Finally, galvanic isolation is a critical requirement. Because steel is highly active on the galvanic scale, stray current in a poorly wired marina can quickly dissolve sacrificial zinc anodes and begin eating the hull or underwater fittings. The entire DC and AC electrical systems must be isolated, and a high-quality galvanic isolator or isolation transformer is non-negotiable for marina dockage.
Modernization & Upgrades
Modernizing a classic Kaiulani 38 typically begins with the auxiliary engine. Many hulls were originally fitted with the venerable Perkins 4-108 diesel engine. While highly robust, these naturally aspirated engines are notorious for oil leaks and are far less fuel-efficient than modern counterparts. Replacing the old diesel with a modern, fresh-water-cooled Beta Marine or Yanmar engine of 40 to 50 horsepower significantly reduces noise, vibration, and fuel consumption, while offering a much cleaner bilgewater environment.
Electrical modernization is another common refit priority. Replacing older lead-acid batteries with a robust lithium iron phosphate (LiFePO4) bank allows owners to run modern high-draw appliances—such as watermakers, induction cooktops, and high-efficiency DC refrigeration—without needing to run a generator. This is typically paired with high-output alternators and heavy-duty smart regulators.
Finally, upgrading the exterior coatings to a modern polyurethane paint system (such as Awlgrip or Alexseal) over an epoxy primer base is the best way to minimize steel hull maintenance. When properly applied over a sandblasted, white-metal surface, these modern paint systems seal the steel and prevent the constant cycle of spot-rusting and chipping that plagued older steel vessels.
The Verdict
The Kaiulani 38 is a specialized, serious offshore machine designed for sailors who prioritize safety, structural invincibility, and heavy-weather comfort over light-air speed or dockside marina space. While a steel boat requires a disciplined owner who understands the realities of corrosion prevention, the reward is a bulletproof hull that can withstand collisions with containers, ice, or reefs that would easily write off a fiberglass alternative.
Pros
- Immense structural strength and collision resistance far exceeding fiberglass
- Exceptional heavy-weather motion comfort and high capsize resistance
- Innovative "Brewer Bite" keel design offering excellent tracking and protected rudder
- High-quality, seaworthy, and private three-cabin interior layout
- Well-engineered cutter rig that is highly manageable for a short-handed crew
Cons
- Demands rigorous, ongoing maintenance to prevent rust and galvanic corrosion
- Relativly heavy and sluggish in light-air conditions under 10 knots
- Potential for hidden corrosion behind older interior insulation
- Teak decks over steel (if equipped) represent a costly, high-risk maintenance issue
- Limited, semi-custom production run means finding parts or sisterships requires specialized research
