The Dolphin 15 Senior, sometimes referred to as just the Dolphin Senior, is an American

sailing dinghy Dinghy sailing is the activity of sailing small boats by using five essential controls: * the sails * the foils (i.e. the daggerboard or centreboard and rudder and sometimes lifting foils as found on the Moth) * the trim (forward/rear angle of ...

that was designed by brothers Glenn Corcoran and Murray Corcoran and first built in 1964.Sherwood, Richard M.: ''A Field Guide to Sailboats of North America, Second Edition'', pages 44-45.

Houghton Mifflin Company Houghton Mifflin Harcourt (; HMH) is an American publisher of textbooks, instructional technology materials, assessments, reference works, and fiction and non-fiction for both young readers and adults. The company is based in the Boston Financ ...

, 1994.

Production

The design was built by Silverline Boats in

Moorhead, Minnesota Moorhead () is a city in and county seat of Clay County, Minnesota, United States, on the banks of the Red River of the North. Located in the Red River Valley, an extremely fertile and active agricultural region, Moorhead is also home to several ...

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...

, until 1980 when the company closed. Production was then assumed by the Dolphin Sailboat Company of

Independence, Missouri Independence is the fifth-largest city in Missouri and the county seat of Jackson County, Missouri, Jackson County. Independence is a satellite city of Kansas City, Missouri, and is the largest suburb on the Missouri side of the Kansas City metro ...

from 1981 to 1985 when it ceased business. The boat design is now out of production.

Design

The Dolphin 15 Senior 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 (Commonwealth English) is a common type of fiber-reinforced plastic using glass fiber. The fibers may be randomly arranged, flattened into a sheet called a chopped strand mat, or woven into glass cloth ...

. It has a

lateen A lateen (from French ''latine'', meaning "Latin") or latin-rig is a triangular sail set on a long yard mounted at an angle on the mast, and running in a fore-and-aft direction. The settee can be considered to be an associated type of the same o ...

rig, a spooned,

raked stem The stem is the most forward part of a boat or ship's bow and is an extension of the keel itself. It is often found on wooden boats or ships, but not exclusively. Description The stem is the curved edge stretching from the keel below, up to ...

, a vertical

transom Transom may refer to: * Transom (architecture), a bar of wood or stone across the top of a door or window, or the window above such a bar * Transom (nautical), that part of the stern of a vessel where the two sides of its hull meet * Operation Tran ...

, a rounded, transom-hung

rudder A rudder is a primary control surface used to steer a ship, boat, submarine, hovercraft, aircraft, or other vehicle that moves through a fluid medium (generally aircraft, air or watercraft, water). On an aircraft the rudder is used primarily to ...

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 or stock to provide leverage in the form of torque for the helmsman to turn the rudder. ...

and a retractable fiberglass

daggerboard A daggerboard is a retractable centreboard used by various sailing craft. While other types of centreboard may pivot to retract, a daggerboard slides in a casing. The shape of the daggerboard converts the forward motion into a windward lift, cou ...

. The rudder is fiberglass, with an

aluminum Aluminium (aluminum in American and Canadian English) is a chemical element with the symbol Al and atomic number 13. Aluminium has a density lower than those of other common metals, at approximately one third that of steel. It has ...

head. The boat 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 vessel ...

of with the daggerboard extended and with it retracted, allowing beaching or ground transportation on a trailer or car roof rack. For sailing the design has hiking bars, a high

freeboard In sailing and boating, a vessel's freeboard is the distance from the waterline to the upper deck level, measured at the lowest point of sheer where water can enter the boat or ship. In commercial vessels, the latter criterion measured relativ ...

and a molded splashguard in front of the mast. It has a small, square, open stowage compartment molded into the hull, just aft of the mast. The design has a

Portsmouth Yardstick The Portsmouth Yardstick (PY) or Portsmouth handicap scheme is a term used for a number of related systems of empirical handicapping used primarily in small sailboat racing. The handicap is applied to the time taken to sail any course, and the han ...

racing average handicap of 106.2 and is normally raced by one

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. The profession of the s ...

Operational history

In a 1994 review Richard Sherwood notes that the, "Dolphin is a lateen-rigged cat board boat, slightly longer than most. Capacity for reasonable sailing is two adults." Randle B. Moore wrote about the design in 2011, saying, "the Dolphin Senior is one of many small sailboats patterned after the world's most produced boat, the Sunfish. The Dolphin is slightly larger than a Sunfish and will hold two full size adults easily."

References

{{Sailing dinghies and skiffs Dinghies 1960s sailboat type designs Sailboat type designs by Glenn Corcoran Sailboat type designs by Murray Corcoran Sailboat types built by Silverline Boats Sailboat types built by Dolphin Sailboat Company

Production

Design

Operational history

See also

References