SS Class — Information, Review, Specs

Benjamin Hallock·1909·~150 hulls·Benjamin Hallock
SS Class drawingBuilder drawing
Hull type
Monohull · centerboard
Rig
Gaffhead Sloop
LOA
16.47' · 5.02 m
Displ.
900 lbs · 408 kg
First year
1909

The SS Class is an enduring testament to the design philosophy of Sparkman & Stephens, having been originally commissioned in 1935 as Design No. 133. Conceived as a robust trainer and family daysailer for the members of the Quissett Yacht Club, the boat was intended to bridge the gap between small dinghies and larger keelboats. At roughly 16.5 feet in length, it distinguishes itself from many other boats in its size category through its significant ballast and "big boat" feel. Often constructed with a cedaroveroak frame in its original iterations, the class transitioned to fiberglass construction via Cape Cod Shipbuilding, which continues to provide parts and support for the fleet today. Its hull is characterized by a full keel with an integrated lead casting, a design choice that provides remarkable stability for a vessel of this scale.

Measurements

Dimensions 01

LOA
16.47 ft
LWL
14 ft
Beam
4.75 ft
Draft
2.75 ft
Max headroom
-
Air draft
-

Construction & hull 02

Construction
Wood
Hull type
Monohull
Keel type
Centerboard
Rudder
1× —
Ballast
-
Displacement
900 lbs
Water
-
Fuel
-

Rig & sails 03

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

Calculations 04

SA/D ratio
22.83
Ballast/Disp.
D/L ratio
146.42
Comfort ratio
11.82
Capsize screening
1.97
Hull speed
5.01 kn

Sailing Performance & Handling

The sailing characteristics of the SS Class are defined by its high ballast-to-displacement ratio. Unlike light-displacement centerboarders that rely on hiker weight to stay upright, the SS Class uses its 450-pound lead keel to provide a stiff, forgiving ride. According to technical specifications provided by Cape Cod Shipbuilding, the boat carries approximately 160 square feet of sail area, which is sufficient to move its 1,100-pound displacement efficiently in light air while remaining manageable when the breeze freshens.

In terms of handling, the boat is known for its "heavy" feel, mimicking the momentum and tracking of a much larger offshore yacht. It does not plane; rather, it carves through a chop with a sea-kindliness rarely found in sub-20-foot boats. The Marconi rig is simple to tune, and while the boat is often raced with a crew of two or three, it is easily handled solo by an experienced sailor. Owners frequently note that the boat's tracking is exceptionally true, allowing the helm to be balanced with minimal effort, a hallmark of Sparkman & Stephens’ naval architecture.

The SS Class holds a prestigious position in the history of New England yachting, particularly within Buzzards Bay. It is a centerpiece of the Quissett Yacht Club, which has maintained an active racing fleet for nearly nine decades. This continuity has made the SS Class a cultural fixture in Falmouth, Massachusetts, where generations of sailors have learned the fundamentals of keelboat racing on these hulls. While it lacks the global fame of the larger S&S designs like the Swan 38, it is frequently cited in regional maritime history books as a pivotal "Junior" class that influenced the development of American one-design racing.

Known Issues & Buyer’s Checklist

When inspecting an SS Class, the primary concern is the material of construction, as both wooden and fiberglass versions remain in active use.

  1. Keel Bolt Integrity: For both wood and fiberglass models, the transition where the lead keel meets the hull should be inspected for "the smile"—a gap that indicates potential keel bolt stretching or corrosion.
  2. Wooden Rib Condition: In original wooden hulls, the steam-bent oak ribs are prone to cracking near the turn of the bilge. Potential buyers should look for "sistering" (repairs where a second rib is placed alongside a broken one), which can indicate the hull's structural history.
  3. Deck-to-Hull Joint: On fiberglass models, check the mechanical fasteners and the rub rail for signs of separation, particularly if the boat has been used extensively for racing where "docking by braille" or heavy contact might have occurred.
  4. Spars and Rigging: Older wooden masts should be checked for longitudinal checking or rot at the spreaders. Many owners have upgraded to aluminum spars for ease of maintenance, which is generally considered a plus for a "user" boat but may be a point of contention for strict traditionalists.

Community & Resources

The heart of the SS Class community is the Quissett Yacht Club SS Class Committee, which manages the class rules and organizes the annual racing schedule. For technical support, parts, and new builds, Cape Cod Shipbuilding remains the authoritative resource, holding the rights to the design and the original molds for the fiberglass version. These organizations ensure that the one-design integrity of the class is maintained, making it easier for buyers to find standardized replacement sails and hardware.

The Verdict

The SS Class is an ideal choice for the traditionalist who desires the grace and stability of a classic keelboat in a package small enough to be easily managed.

Pros

  • Exceptional Stability: The lead keel makes it nearly impossible to capsize under normal sailing conditions.
  • Aesthetic Appeal: Classic S&S lines that remain beautiful and relevant decades after their debut.
  • Longevity: Strong class support and the availability of fiberglass models mean these boats can last a lifetime with basic care.

Cons

  • Weight: At 1,100 lbs, it requires a dedicated trailer and a capable tow vehicle; it is not a "beach-launchable" dinghy.
  • Limited Versatility: Without an interior or significant storage, it is strictly a daysailer or racer.
  • Maintenance: Wooden versions require significant annual upkeep to remain sea-worthy.

Similar sailboats

8 comparable designs · similar LOA, displacement & rig