Quick Answer: What Is a Chinese Junk Lugsail?
A Chinese junk lugsail is a sail supported from above by an angled yard, with battens running across its face. The yard is a spar at the top, and the battens support the material below it. Chinese vessels carried different arrangements of sails and masts, and the shape of the hull is a separate part of the design.[1][3][4]
- The yard is the upper spar. Battens extend across the sail.[3]
- A northern trading-ship model in Greenwich preserves bamboo battens in its rig.[1]
- A shipwreck can preserve hull partitions even when the sail fabric is gone.[6]
Start by reading the sail and hull as separate parts of the vessel.
The bars across the sails are often the first detail people notice on a picture of a Chinese junk. They can tell you about the sail even when the curve of the hull or the depth of the vessel is hard to see.
How to Recognize the Yard and Battens
Find the mast, the long upright support. The yard spans the upper edge of a lug and passes across the mast at an angle. The battens extend across the sail below the yard. In a side view, this gives the sail a series of visible bands.[3]
A sail needs to hold its shape in moving air. In a different setting, Chinese kites also used fabric or paper with a frame. The sail and the kite used their material and supports for different jobs.
What the Trading Ship Models Show
Royal Museums Greenwich records a model of a northern vessel called an Antung Trader. Its four masts carry different sails, with horizontal bamboo battens. Another model, a Pechili trader, preserves a separate piece catalogued as a fully battened sail with its mast. Read each model as evidence for the design it represents, and compare the groupings of sails rather than assuming a single arrangement.[1][2]
Why Hull Shape Varied
The China Maritime Museum compares the flat-bottomed shachuan (沙船, shāchuán) with deeper-bottomed forms from farther south, including the fuchuan (福船, fúchuán). Different bottoms suited different depths and routes. The hull and sailing rig together helped define what a vessel could do.[4]
The broader survey of Chinese sailing ships covers additional regional forms. Sail shape alone cannot establish a precise hull type.
What the Quanzhou Wreck Records
A Song cargo vessel recovered in Quanzhou Bay preserves evidence of a hull divided by bulkheads. Fujian’s documented tradition used sealed compartments to limit flooding from a damaged section. This tells historians about the vessel’s construction and its relationship to commerce on the Maritime Silk Road.[5][6]
The hull is strong evidence for its own layout. To understand a lost rig or details of navigation such as the use of the compass, historians may need different objects or written sources.
FAQs About Chinese Junks and Lugsails
What are the bars across a junk sail called?
They are battens. They support the sail beneath the upper yard.[1][3]
Did all Chinese junks have the same sail arrangement?
No. Surviving models record different numbers of masts and multiple arrangements of sails.[1][2]
Are battens and bulkheads the same thing?
Battens support a sail. Bulkheads divide the interior of a hull.[1][5]
Sources
[1] Royal Museums Greenwich. Antung Trader full-hull model
[2] Royal Museums Greenwich. Pechili trading junk sail
[3] Practical Boat Owner. Lugsail glossary
[4] China Maritime Museum. Shachuan collection description
[5] UNESCO Intangible Cultural Heritage. Watertight-bulkhead technology of Chinese junks
[6] UNESCO Intangible Cultural Heritage nomination materials. Watertight-bulkhead technology documentation