Herreshoff 42 Information, Review, Specs

Make
Herreshoff
Model
42
Builder
Designer
Number Built

The Herreshoff 42 represents a collection of designs from one of yachting’s most storied families, primarily encompassing the Mobjack designed by L. Francis Herreshoff and the Arion designed by Sidney DeWolf Herreshoff. While they share a namesake and a 42-foot length, they occupy distinct niches in maritime history. The Sidney DeWolf Herreshoff-designed Arion, launched in 1951, holds a place of profound significance as the world’s first large auxiliary sailing yacht constructed from fiberglass. Conversely, the Mobjack design by L. Francis Herreshoff—detailed in his seminal book Sensible Cruising Designs—is a 42-foot, 6-inch ketch often built in wood, steel, or aluminum. Both variants are defined by the "Herreshoff style": narrow beams, long waterlines, and a commitment to sea-kindliness over raw interior volume. These vessels were not built to a mass-market price point but were instead crafted as high-end custom or semi-custom "proper ships" for offshore passage-making.

Sailing Performance & Handling

The sailing characteristics of a Herreshoff 42 vary significantly between the lightweight Arion lineage and the heavier Mobjack variants. The Arion, with its remarkably narrow 8-foot, 1-inch beam and a displacement-to-length ratio that was revolutionary for its time, is described by the Herreshoff Marine Museum as a fast, slender ketch that tracks with exceptional precision. Because it lacks the "fat" midsections of modern cruisers, it enters waves cleanly without pounding, though its narrowness makes it sensitive to weight placement.

The Mobjack 42, typically found in sturdier aluminum or wood-epoxy constructions, carries more displacement—often upwards of 30,000 lbs—and utilizes a full-length keel. This provides a "heavy-weather" feel where the boat ignores surface chop and maintains momentum in light air once moving. Both designs utilize the ketch rig, which allows for a variety of sail combinations, such as "jib and jigger" (headsail and mizzen), making them exceptionally easy to balance in high winds. Owners frequently note that the helm remains light even when pressed, a testament to the balanced hull forms and efficient underwater profiles inherent to the Herreshoff legacy.

Interior Comfort & Variations

The interior of a Herreshoff 42 is a masterclass in traditional nautical aesthetics, often referred to as "Herreshoff Style," characterized by white bulkheads and gloss-varnished mahogany or teak trim. In the Sidney Herreshoff Arion variants, the narrow beam necessitates a linear layout with pilot berths and a cozy, somewhat confined galley. Headroom is generally sufficient at the centerline but tapers quickly at the outboard edges.

The L. Francis Herreshoff Mobjack 42 offers a more commodious experience, often including a pilothouse configuration. These models provide roughly two meters of headroom and a spacious "U-shaped" galley. Because many of these were custom-built, variations are extensive; some feature a large owner's V-berth forward with multiple single bunks amidships, while others prioritize a grand salon for entertaining. Unlike modern "condo-marans," the Herreshoff 42 prioritizes sea berths with lee cloths, ensuring the crew has secure places to sleep while the vessel is heeled at sea.

The Arion 42 is a frequent subject of academic and historical nautical study due to its pioneering fiberglass construction. It was famously commissioned by Verner Z. Reed and built by The Anchorage in Rhode Island. Its 70th anniversary was widely covered by technical journals like Professional BoatBuilder, which detailed how its "Dyeresin" hull paved the way for the fiberglass revolution, despite L. Francis Herreshoff famously deriding the material as "frozen snot." The Mobjack design remains a staple of classic yachting literature and is often featured in "Master Mariners" regattas and wooden boat festivals worldwide.

Known Issues & Buyer’s Checklist

Prospective buyers must approach a Herreshoff 42 with a specialist’s eye, as construction materials vary by builder.

  • Deck and Core Integrity: Many variants, including the early fiberglass Arion hulls, utilized plywood-cored decks covered in glass or canvas. Delamination and rot in these areas are common, particularly around stanchion bases and chainplates.
  • Electrolysis (Metal Hulls): For Mobjack variants built in aluminum or steel, a rigorous inspection of the hull’s interior "bilge pockets" is required to check for galvanic corrosion.
  • Chainplate and Rigging Loads: The ketch rig involves two masts and a complex web of standing rigging. In older wooden-hulled versions, the strain on the chainplates can lead to "creeping" of the hull planks if the internal structural knees have weakened.
  • Rudder Bearings: On custom-built models, the rudder bearing blocks and steering quadrants are often mounted on wooden shelves. These are prone to water damage from cockpit locker leaks and should be inspected for softening.

Community & Resources

The primary hub for these vessels is the Herreshoff Marine Museum / America's Cup Hall of Fame in Bristol, Rhode Island, which maintains extensive design records and half-hull models. The Herreshoff Registry serves as a vital technical archive for owners, helping to track the lineage and modifications of the 1,100+ vessels built by the Herreshoff Manufacturing Company and those built subsequently to their plans.

The Verdict

Pros:

  • Exquisite, timeless aesthetics that command respect in any harbor.
  • Superior sea-kindliness and a comfortable, predictable motion in heavy seas.
  • Historical significance, particularly in the case of the fiberglass-pioneering Arion.
  • Versatile ketch rig for easy shorthanded sail management.

Cons:

  • High maintenance requirements, especially for wood or metal-hulled custom builds.
  • Narrower interior living space compared to modern beam-heavy designs.
  • The complexity of two masts increases standing and running rigging costs.

Measurements

Construction & Hull

Construction Material
Hull Type
— Sailboat
Keel Type
Ballast
-
Displacement
-
Water Capacity
-
Fuel Capacity
-

Dimensions

Length Overall (LOA)
-
Waterline Length (LWL)
-
Beam
-
Draft
-
Max Headroom
-
Air Draft
-
Hover over a measurement
IJPE FS LOALWL

Rig & Sails

Rig Type
P (Main Luff)
-
E (Main Foot)
-
I (Foretriangle Height)
-
J (Foretriangle Base)
-
Forestay Length (est)
-
Sail Area
-

Calculations

Sail Area / Displacement (SA/D) Ratio
Ballast / Displacement Ratio
Displacement / Length Ratio (D/L) Ratio
Comfort Ratio
Capsize Screening Formula
Hull Speed
— kn