lugsail

n.

后缘长的四角纵帆；

The Galician Lugsail: An old form of fore-and-aft sail
Sail shape and sailing performance measurement The Chinese lug sail
Sail shape and sailing performance measurement : the Chinese lug sail.
Influence and evolution: the development of the batten lug sail
Langstone Harbour Boats
Six Poems from Bulkington
The design of a 9m trimaran with novel rig.
Reaper (Sailing Vessel)
Parts of a sail
Lugger