D 35 Information, Review, Specs

D 35 Drawing
Make
D
Model
35
Builder
Carroll Marine Ltd.
Designer
Nelson/Marek
Number Built
48
Production Year(s)
1998 - 2001

The 1D35 represents a pivotal moment in the late 1990s when grand-prix racing technology trickled down into a dedicated one-design class. Developed by the design office of Nelson/Marek and built with exacting standards by Carroll Marine, the 1D35 was conceived as a high-performance racing machine that prioritized speed and structural integrity over traditional cruising amenities. Launched in 1997, the boat was engineered to provide the thrill of a dinghy with the stability and presence of a 35-foot keelboat. Its construction utilized vacuum-bagged epoxy and E-glass over a Corecell foam core, a sophisticated laminate schedule for the era that ensured a high strength-to-weight ratio. The 1D35 was specifically designed to be easily transported, featuring a removable keel and a mast that could be stepped without a massive crane, catering to the burgeoning "circuit" style of racing where owners moved boats between major regattas.

Sailing Performance & Handling

The sailing characteristics of the 1D35 are defined by its exceptionally light displacement of approximately 6,250 pounds and a generous sail area, resulting in a Sail Area/Displacement ratio often exceeding 30. This makes the boat incredibly responsive in light air, where it can easily outpace heavier dual-purpose racer-cruisers. According to editorial coverage in Sailing World, which named the boat its 1998 Boat of the Year in the performance category, the 1D35 provides a level of feedback to the helm that is rare in boats of this size.

Handling is sharp and demanding. Under its fractional rig with a carbon fiber mast—a standard feature that was revolutionary for a production one-design at the time—the boat accelerates rapidly out of tacks. Downwind, the 1D35 transitions into a planing mode early, often utilizing a large asymmetric spinnaker flown from a retractable carbon pole. However, this performance comes with a caveat: the boat requires an active and skilled crew. In heavy air, the deep 7.5-foot fin keel provides necessary leverage, but the boat’s narrow waterline means it can be sensitive to weight placement and trim. Owners often describe the handling as "surgical," noting that while it is rewarding for a focused team, it can be unforgiving of sloppy maneuvers in high-pressure maneuvers.

Interior Comfort & Variations

True to its "1D" (One Design) moniker, the interior of the 1D35 is secondary to its racing mission. While it technically provides an enclosed living space, the environment is minimalist and functional, often referred to as "industrial-chic" or simply "Spartan." The layout consists of four to six pipe berths for offshore racing or overnight transit, a basic galley area with a single-burner stove, and a simple marine head located forward.

There is little to no decorative wood; instead, the interior showcases the clean, white-painted surfaces of the epoxy hull and the structural bulkheads. Headroom is limited, as the low-profile coachroof is designed to minimize windage and keep the center of gravity low. While Carroll Marine built the vast majority of these hulls to a strict one-design specification, there are no "cruising" variants. Its sibling, the 1D48, followed a similar philosophy on a larger scale, offering more interior volume but maintaining the same focus on weight-saving and high-tech construction. For the 1D35, the "variation" lies primarily in how owners have maintained or updated the electronics and sail handling systems over the decades.

The 1D35 enjoyed a robust competitive lifespan, particularly on the Great Lakes and East Coast circuits during the late 90s and early 2000s. It was a staple of the Key West Race Week and various North American championships. While it hasn't appeared in major cinema, its "Boat of the Year" accolades from Sailing World cemented its status in the nautical press as a benchmark for performance. The model is also frequently mentioned in technical papers regarding epoxy construction and carbon fiber mast integration in production boats, as it served as a successful case study for Carroll Marine’s industrial capabilities.

Known Issues & Buyer’s Checklist

Purchasing a 1D35 today requires a rigorous inspection of its high-tech components, as these boats were often raced hard in demanding conditions.

  • Core Integrity: Because the hull is a sandwich construction using Corecell, it is vital to check for delamination or moisture ingress, particularly around the keel grid, chainplates, and deck hardware. Any soft spots in the deck are a sign of potential core compromise.
  • Carbon Rig Fatigue: The Hall Spars carbon mast should be professionally surveyed. Buyers should look for UV degradation of the clear coat, stress cracks around the sheaves and spreaders, and any signs of "pumping" damage in the laminate.
  • Keel Attachment: The 1D35 features a high-aspect-ratio keel with a heavy lead bulb. The keel floors and the area around the keel bolts must be inspected for "crane cracks" or structural fatigue caused by the high righting moments or potential groundings.
  • Rudder Bearings: The high-performance rudder is subject to significant loads. Play in the helm often indicates worn self-aligning bearings, which can be an expensive and technical repair.
  • Engine Maintenance: Most 1D35s are equipped with a small Yanmar diesel with a saildrive. The saildrive diaphragm (the rubber seal) has a recommended replacement interval that is often ignored by racing-focused owners; this should be verified immediately.

Community & Resources

The 1D35 community remains active through localized racing fleets, though the formal national class association has seen a decline since the builder closed. Technical information is often preserved through the Nelson/Marek Design archives and the Carroll Marine owner community discussions found on regional racing forums. Many owners still congregate at major "Beer Can" racing events and handicap regattas (PHRF or ORC), where the boat remains highly competitive against modern designs.

The Verdict

The 1D35 is a thoroughbred racer that offers an uncompromising sailing experience for those who prioritize speed and tactical precision over comfort.

Pros:

  • Exceptional light-air performance and early planing capabilities.
  • High-quality construction using epoxy and carbon fiber.
  • Extremely responsive handling that rewards skilled sailors.
  • Removable keel and stepped mast facilitate easier transport for a boat of this size.

Cons:

  • Spartan interior offers zero "cruising" appeal or family comfort.
  • Requires a large, coordinated crew to manage the rig and sails in heavy air.
  • Ongoing maintenance of high-tech materials (carbon mast, epoxy core) can be costly.
  • Draft of 7.5 feet limits access to shallow harbors and coastal cruising grounds.

Measurements

Construction & Hull

Construction Material
Fiberglass
Hull Type
Monohull Sailboat
Keel Type
Bulb
Rudder
1x Spade
Ballast
2525 lbs (Lead)
Displacement
6550 lbs
Water Capacity
42 gal
Fuel Capacity
12 gal

Dimensions

Length Overall (LOA)
35 ft
Waterline Length (LWL)
31.5 ft
Beam
10.75 ft
Draft
7.58 ft
Max Headroom
5.33 ft
Air Draft
-
Hover over a measurement
IJPE FS LOALWL

Rig & Sails

Rig Type
Fractional Sloop
P (Main Luff)
44.45 ft
E (Main Foot)
18.57 ft
I (Foretriangle Height)
42.3 ft
J (Foretriangle Base)
12.5 ft
Forestay Length (est)
44.11 ft
Sail Area
802 sqft

Calculations

Sail Area / Displacement (SA/D) Ratio
36.65
Ballast / Displacement Ratio
38.55
Displacement / Length Ratio (D/L) Ratio
93.55
Comfort Ratio
13.15
Capsize Screening Formula
2.3
Hull Speed
7.52 kn