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Historical Materials

Historical Materials  »  Vessel Types  »  Ship Models

Ship Models

Ship models as aids in the design of a ship played an important role in America from the late eighteenth century to the early twentieth. Most widespread was the builder's half-model, a half hull to scale, such as 1/2" = 1' (1:24 or one twenty-fourth actual size). These half-models were made in three ways: block half-hulls, "hawk's nest" models, and "lift" half models.

The block half-hull was the simplest—the shape of one side of the hull was carved from a solid piece of wood. "Stations," locations of frames at convenient intervals, were marked on the hull and "templates" wooden shims carefully shaped to fit closely at each station were made from thin sheets of wood. The templates could then be traced on paper (or wood, if paper was too expensive) marked with a grid for measuring dimensions at regular intervals. The paper grid was redrawn on a mold loft floor to the full size of the vessel, and measurements were made where the grid lines intersected the traced curves. Wooden patterns called "molds" were made from the measurements and used as patterns for full-size frames.

The "hawk's nest" model consisted of solid "frames" (actual molds), mounted on a "back board," and fitted with a keel, stem, stern post, and thin strips of wood outlining the run of the hull planking. More importantly, the strips, or "stringers," aided in the "fairing" of the frames so planks would fit to the frames without showing bumps or hollows.

The "lift" half model was the method of choice from the 1840s onward. Carefully planed boards of uniform thickness were screwed together and carved to the shape of the envisioned half-hull. After the desired hull form was established, the surface was carefully smoothed and "faired", aided by flexible battens and "sighting" the curved surfaces. The model was then disassembled and each lift traced, taking care that the lifts were accurately superimposed on the tracing sheet. The hull profile was also traced, usually in alignment with the lift tracings. The locations of frames (or sometimes only every second or fourth frame) were carefully drawn on the tracings and their "half breadths" measured and tabulated. When the half-breadths were converted to full size dimensions, they became "offsets" used to lay down the molds for the frames. Sometimes, the offsets were written on station lines scribed on the top surface of each lift, making the model its own table of offsets.

Builders' half models are priceless documents of  nineteenth-century ship design and have been the essential starting point for many important reconstructions of the vessels of that period, whether in model or full-size reconstruction. They rank among the most important objects in marine museum collections.

– Erik Ronnberg

Reference:

Howard I. Chapelle, The National Watercraft Collection (Washington, DC: Smithsonian Institution, 1962).

model
Model of yacht "America"
Model and photography by Erik A.R. Ronnberg. Jr.
2012
Wood, metal, cordage, Egyptian cotton sail cloth
Scale: 3/8" = 1'
Private collection

Plaque reads: "Schooner Yacht America. Designed by George Steers and built by William H. Brown at New York City, 1851 Winner of the Royal Yacht Squadron £100 Cup in a race around the Isle of Wight, August 22, 1851." 

 

model
Colonial Shallop model (broadside)
MIT Museum
model
Model of the pinky "Essex"
Model and photography by Erik A.R. Ronnberg, Jr.
model
Model of fishing schooner "Amy Knight"
Model and photography by Erik A.R. Ronnberg, Jr.
Wood, metal hardware, cordage, paint
Model made for marine artist Thomas M. Hoyne
scale: 3/8" = 1'
Thomas M. Hoyne Collection, Mystic Seaport, Conn.

While this model was built to represent a typical Marblehead fishing schooner of the early nineteenth century, it has the basic characteristics of other banks fishing schooners of that region and period: a sharper bow below the waterline and a generally more sea-kindly hull form, a high quarter deck, and a yawl-boat on stern davits.

The simple schooner rig could be fitted with a fore topmast and square topsail for making winter trading voyages to the West Indies. The yawl boat was often put ashore and a "moses boat" shipped on the stern davits for bringing barrels of rum and molasses from a beach to the schooner.

– Erik Ronnberg

References:

Jeffrey Bolster, Black Jacks: African American Seafarers in the Age of Sail (Cambridge, MA: Harvard University Press, 1997).

Howard I. Chapelle, American Small Sailing Craft (New York: W.W. Norton & Co., 1951), 29–31.

Also filed under: Hand-lining »   //  Schooner (Fishing) »

object
Scale model of stone sloop "Albert Baldwin"
William Niemi
c.1940
Wood, metal, cordage, cloth, paint.
Scale: ¼ in. = 1ft. (1:48)
Cape Ann Museum. Gift of Roland and Martta Blanchet (1997.17.3)

Although built in 1890 and larger than the stone sloops of Lane’s time, the "Albert Baldwin’s" hull form, rig, and loading boom are very similar to those of the 1840s and 1850s.

Also filed under: Granite Quarrying / Shipping »   //  Sloop »

photo (historical)
Centennial Photographic Co. Philadelphia: International Exhibition, 1876
Stereograph card
Cape Ann Museum Library & Archive

Diorama of Gloucester fishing boats, which includes several models now in the collection of the Cape Ann Museum

Also filed under: Fishing »   //  Historic Photographs »

model
Chebacco Boat model
Model and photography by Erik A.R. Ronnberg, Jr.
Model of Chebacco Boat, early nineteenth century with wherry alongside
model
Colonial Shallop model (stern view)
MIT Museum
model
"Dancing Feather" Boston pilot boat model
Rob Napier
Twentieth century
Mahogany, cotton, paper, metal
29 x 34 x 6 1/2 in (73.66 x 86.36 x 16.51 cm)
M27746
Peabody Essex Museum

Also filed under: Schooner (Pilot) »

model
Dogbody model
Smithsonian
model
Half model of "America"
19th century
Wood
New York
35 1/2 x 37 x 5 1/2 in. (90.17 x 93.98 x 13.97 cm)
Peabody Essex Museum
model
Joseph A. Proctor (Gloucester, MA) fisherman's dory
Wood
Gloucester, MA
4 x 33 1/2 x 7 1/4 in (10.16 x 85.09 x 18.415 cm)
Peabody Essex Museum
model
Model of the pinky "Essex" with dory and wherry alongside
Model and photography by Erik A.R. Ronnberg, Jr.
model
Model of the yacht "Northern Light" based on Lane's painting
Model by Rob Napier, photo by Erik Ronnberg
1991
wood, metal, cordage
Model of schooner yacht "Northern Light" of Boston, 1839
Scale 1:32
model
Pinky (fishing schooner) "Sailor's Delight"
J. Doane S. Nickerson
Wood, metal, cordage
20" l. x 19" h. x 3 3/4" w. [not to scale]
Cape Ann Museum. Gift of Mr. J. Hollis Griffin, 1940 (891)

"Pinkys" were early nineteenth-century schooner-rigged derivations of Chebacco boats. This model is a good example of a traditional “sailor’s model,” or in this case, a sailmaker’s model, Mr. Nickerson having been a sailmaker.

Citation: "Historical Materials." Fitz Henry Lane Online. Cape Ann Museum. http://fitzhenrylaneonline.org/historical_material/index.php?section=Ship+Models (accessed August 17, 2017).
Please note that the information on this and all pages is periodically reviewed and subject to change.
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