The M-16 Scow is a quintessential example of the "Inland Lake" design philosophy—a high-performance, flat-bottomed racing dinghy engineered specifically for the gusty and often shifty conditions of freshwater lakes. Originally established as a competitive class under the Inland Lake Yachting Association, the M-16 has been produced by several storied builders, including Melges Performance Sailboats and Johnson Boat Works, before Windward Boatworks became a primary custodian of the class. Measuring 16 feet in length with a generous beam relative to its size, the M-16 is a "bilgeboard" boat, meaning it utilizes two asymmetrical boards rather than a single centerboard. This design allows the boat to be sailed at a significant angle of heel, which reduces the wetted surface area and transforms the hull into a long, narrow, and incredibly fast slicing machine. As a strict one-design class, the M-16 emphasizes tactical skill and crew coordination over equipment spending, making it a favorite for youth and adult pairs alike.
M-16 Scow Information, Review, Specs

- Make
- M-16
- Model
- Scow
- Builder
- Windward Boatworks
- Designer
- Johnson/Melges Boat Works
- Number Built
- Production Year(s)
- 1950 - ??
Sailing Performance & Handling
The M-16 Scow is defined by its "heeled-over" sailing posture. Unlike a traditional monohull that sailors strive to keep flat, a scow is designed to be sailed on its "bilge" or side. By heeling the boat roughly 15 to 25 degrees, the sailor lifts the wide, flat bow and transom out of the water, effectively creating a much narrower, streamlined hull shape. This reduces drag and allows the boat to plane with remarkable ease. According to technical guides from the Inland Lake Yachting Association, the dual bilgeboard system is critical here; the leeward board is lowered to provide lift and prevent leeway, while the windward board is retracted to eliminate unnecessary drag.
With a high Sail Area to Displacement (SA/D) ratio, the M-16 is exceptionally responsive. In light air, it is a sensitive instrument that requires delicate weight placement to maintain momentum. Once the breeze reaches 8 to 10 knots, the M-16 transitions into a planing mode, skimming across the surface rather than pushing through it. Handling is managed via a fractional sloop rig with a powerful mainsail and a jib. Because of its flat bottom, the boat can be prone to "spinning out" if over-pressed in heavy gusts without sufficient hiking, but the twin-rudder system found on many modern iterations ensures that at least one blade remains deeply submerged and effective even at extreme angles of heel.
Popular Mentions & Media
The M-16 Scow’s cultural footprint is deeply embedded in the sailing traditions of the American Midwest. It is frequently cited in regional yacht club histories as the "stepping stone" boat that prepared generations of sailors for the larger E-Scow and A-Scow classes. While it hasn't enjoyed the global cinematic exposure of offshore racers, it is a staple of one-design coverage in publications like Sailing World, particularly regarding the ILYA Championship regattas, which are some of the most storied inland sailing events in the United States. The boat’s legacy is often tied to the "Scow Greats"—legendary sailors like Buddy Melges, whose family's company, Melges Performance Sailboats, helped refine the scow hull form that Windward Boatworks continues to build today.
Known Issues & Buyer’s Checklist
When evaluating a used M-16 Scow, the primary concern is structural stiffness. Because these boats are designed to be light and are subjected to high rig tensions, the hull can lose its "spring" over decades of hard racing.
- Deck Softness and Delamination: Check the side decks where the crew sits and the area around the mast step. Older fiberglass boats may develop soft spots where the core material has separated from the skin.
- Bilgeboard Trunks: Inspect the trunks (the slots where the boards slide down) for cracks or leaks. Stress at the trunk-to-hull joint is common if the boat has been sailed hard in heavy air or if a board has struck an underwater object.
- Flotation Foam: As noted in the history of Windward Boatworks, older scows occasionally suffer from "wet foam" syndrome. If the internal buoyancy foam has absorbed water, the boat will be significantly over its class-minimum weight, making it uncompetitive and sluggish.
- Stay Tangs and Chainplates: Examine the points where the shrouds attach to the hull. Because the M-16 is a wide-beamed boat with a narrow rig, these points endure significant tension. Look for "crazing" or spider-web cracks in the gelcoat around these fittings.
- Mast Step Alignment: Ensure the mast step hasn't compressed the floor of the cockpit, which can alter the rig geometry and lead to poor sail shape.
Community & Resources
The heart of the M-16 community is the Inland Lake Yachting Association, which manages the class rules and organizes the major regional championships. This organization provides a wealth of technical data, tuning guides, and a community network for sourcing parts and finding crew. Locally, many fleets are concentrated in Wisconsin, Minnesota, and Iowa, where yacht clubs often have dedicated M-16 ramps and storage. For those seeking new builds or factory-authorized parts, Windward Boatworks remains the primary resource, continuing the tradition of Wisconsin-built scows.
The Verdict
The M-16 Scow is a specialized speed machine that offers a unique sailing experience found nowhere else in the 16-foot category. It is a boat for those who appreciate technical finesse and the thrill of high-speed lake racing.
Pros:
- Incredible Speed: Plans early and outperforms almost any other monohull of its length in flat water.
- Tactical Purity: As a strict one-design, races are won on skill rather than the size of one's wallet.
- Longevity: The robust construction of modern Windward or Melges builds allows these boats to remain competitive for years.
- Ease of Launching: The flat bottom and light weight make it simple to trailer and dry-sail.
Cons:
- Lake Specific: Not suitable for heavy chop or open-ocean conditions due to its low freeboard and flat bow.
- Athletic Requirement: Requires active hiking and quick reflexes, which may be challenging for less mobile sailors.
- Niche Market: Outside of the Midwest and a few select pockets, finding a local fleet for racing can be difficult.
Measurements
Construction & Hull
- Construction Material
- Fiberglass
- Hull Type
- Scow Sailboat
- Keel Type
- Centerboard
- Ballast
- -
- Displacement
- 440 lbs
- Water Capacity
- -
- Fuel Capacity
- -
Dimensions
- Length Overall (LOA)
- 16 ft
- Waterline Length (LWL)
- -
- Beam
- 5.8 ft
- Draft
- -
- Max Headroom
- -
- Air Draft
- -
Rig & Sails
- Rig Type
- Fractional Sloop
- P (Main Luff)
- -
- E (Main Foot)
- -
- I (Foretriangle Height)
- -
- J (Foretriangle Base)
- -
- Forestay Length (est)
- -
- Sail Area
- 147 sqft
Calculations
- Sail Area / Displacement (SA/D) Ratio
- 40.65
- Ballast / Displacement Ratio
- —
- Displacement / Length Ratio (D/L) Ratio
- —
- Comfort Ratio
- —
- Capsize Screening Formula
- 3.05
- Hull Speed
- — kn