The US1, sometimes written US 1, is an American

sailing dinghy Dinghy sailing is the activity of sailing small boats - usually for fun, learning necessary sailing skills (often also within family), and competition. RYA lists Five essentials of sailing dinghies as: * The sails * The hydrofoil, foils (i.e. t ...

that was designed by Ralph Kuppersmith and Clark Mills as a

one-design One-design racing is a racing method which may be adopted in sports using complex equipment, whereby all vehicles have identical or very similar designs or models, avoiding the need for a Handicapping, handicap system. Motorsport One-make racing ...

racer and first built in 1973.Sherwood, Richard M.: ''A Field Guide to Sailboats of North America, Second Edition'', pages 56-57.

Houghton Mifflin Company Houghton Mifflin Harcourt Company ( ; HMH) is an American publisher of textbooks, instructional technology materials, assessments, and reference works. The company is based in the Boston Financial District. It was formerly known as the Houghto ...

, 1994. The design is most likely a

catboat A catboat (alternate spelling: cat boat) is a sailboat with a single sail on a single mast set well forward in the bow of a very beamy and (usually) shallow draft hull. Typically they are gaff rigged, though Bermuda rig is also used. Most are f ...

-rigged derivation of the Mills-designed

Windmill A windmill is a machine operated by the force of wind acting on vanes or sails to mill grain (gristmills), pump water, generate electricity, or drive other machinery. Windmills were used throughout the high medieval and early modern period ...

of 1953.

Production

The design was initially built by Kuppersmith's company, the Advance Sailboat Corporation of

Parkville, Missouri Parkville is a city in Platte County, Missouri, Platte County, Missouri, United States and is a part of the Kansas City Metropolitan Area. The population was 7,177 at the 2020 United States census, 2020 census. According to the 2022 census, the ...

and later of

Independence, Missouri Independence is a city in and one of two county seats of Jackson County, Missouri, United States. It is a satellite city of Kansas City, Missouri, and is the largest suburb on the Missouri side of the Kansas City metropolitan area. In 2020 Unite ...

United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...

. That company went out of business in 1980 and the boat design was then built by Continental Sailcraft. A total of 450 boats were completed, but it is now out of production.

Design

The US1 is a recreational

sailboat A sailboat or sailing boat is a boat propelled partly or entirely by sails and is smaller than a sailing ship. Distinctions in what constitutes a sailing boat and ship vary by region and maritime culture. Types Although sailboat terminology ...

, built predominantly of

fiberglass Fiberglass (American English) or fibreglass (English in the Commonwealth of Nations, Commonwealth English) is a common type of fibre-reinforced plastic, fiber-reinforced plastic using glass fiber. The fibers may be randomly arranged, flattened i ...

. It has a catboat rig with a loose-footed

mainsail A mainsail is a sail rigged on the main mast (sailing), mast of a sailing vessel. * On a square rigged vessel, it is the lowest and largest sail on the main mast. * On a fore-and-aft rigged vessel, it is the sail rigged aft of the main mast. T ...

and foam-filled

aluminum Aluminium (or aluminum in North American English) is a chemical element; it has chemical symbol, symbol Al and atomic number 13. It has a density lower than that of other common metals, about one-third that of steel. Aluminium has ...

spars to reduce the risk of turtling. The hull features a rounded foredeck, a plumb stem, a vertical transom, a transom-hung, kick-up

rudder A rudder is a primary control surface used to steer a ship, boat, submarine, hovercraft, airship, or other vehicle that moves through a fluid medium (usually air or water). On an airplane, the rudder is used primarily to counter adverse yaw ...

controlled by a

tiller A tiller or till is a lever used to steer a vehicle. The mechanism is primarily used in watercraft, where it is attached to an outboard motor, rudder post, rudder post or stock to provide leverage in the form of torque for the helmsman to turn ...

and a retractable

centerboard A centreboard or centerboard (US) is a retractable hull appendage which pivots out of a slot in the hull of a sailboat, known as a ''centreboard trunk'' (UK) or ''centerboard case'' (US). The retractability allows the centreboard to be raised t ...

. It displaces . The boat has a

draft Draft, the draft, or draught may refer to: Watercraft dimensions * Draft (hull), the distance from waterline to keel of a vessel * Draft (sail), degree of curvature in a sail * Air draft, distance from waterline to the highest point on a v ...

of with the centerboard extended and with it retracted, allowing beaching or ground transportation on a trailer or car roof rack. For sailing the design is equipped with a dual Cunningham and an outhaul. The class rules allow specific modifications to the boat, including the installation of two bailers, centerboard gaskets, four inspection ports, changes to the sheeting, the

boom vang A boom vang (US) or kicking strap (UK) (often shortened to "vang" or "kicker") is a line or piston system on a sailboat used to exert downward force on the boom and thus control the shape of the sail. The Collins English Dictionary defines it a ...

, the Cunningham, mainsheet traveler, outhaul, as well as the rudder and tiller and the centerboard control lines. At one time the class rules allowed the use of a three-piece mast as an alternative to the standard two-piece mast, but this change was repealed. The design has a Portsmouth Yardstick racing average handicap of 91.5 and is normally raced with a crew of one or two

sailor A sailor, seaman, mariner, or seafarer is a person who works aboard a watercraft as part of its crew, and may work in any one of a number of different fields that are related to the operation and maintenance of a ship. While the term ''sailor'' ...

s, who are limited by the class rules to total weight.

Operational history

In 1994 there were active fleets racing in

Missouri Missouri (''see #Etymology and pronunciation, pronunciation'') is a U.S. state, state in the Midwestern United States, Midwestern region of the United States. Ranking List of U.S. states and territories by area, 21st in land area, it border ...

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Pennsylvania Pennsylvania, officially the Commonwealth of Pennsylvania, is a U.S. state, state spanning the Mid-Atlantic (United States), Mid-Atlantic, Northeastern United States, Northeastern, Appalachian, and Great Lakes region, Great Lakes regions o ...

and

Texas Texas ( , ; or ) is the most populous U.S. state, state in the South Central United States, South Central region of the United States. It borders Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the we ...

References

{{Sailing dinghies and skiffs Dinghies 1970s sailboat type designs Sailboat type designs by Ralph Kuppersmith Sailboat type designs by Clark Mills Sailboat types built by Advance Sailboat Corporation Sailboat types built by Continental Sailcraft

Production

Design

Operational history

See also

References