A foresail refers to one of several types of sail set on the foremost mast (foremast) of a sailing vessel: A sail is a surface intended to generate thrust by being placed in a wind; basically it is a vertically oriented wing. ... mizzen mast, mainmast and foremast Grand Turk The mast of a sailing ship is a tall vertical pole which supports the sails. ... Sailing vessel can refer to: sailing ship sailboat ice boat This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ...
Any triangular sail set forward of the foremast, such as a jib.
A square fore and aft sail set on the foremast, but behind it, on a schooner or other similar vessel.
See also: Jib (television) A jib is a triangular staysail set ahead of the foremost mast of a sailing boat. ... Two-masted fishing schooner A schooner is a type of sailing ship characterized by the use of fore-and-aft sails on two or more masts. ... Square rig is a generic type of sailing vessel in which the main horizontal spars are perpendicular to the keel of the ship. ... Description In sailing, a brigantine is a vessel with two masts, at least one of which is square rigged. ... This article is about the ship. ...
The foresail of a sloop rig operates in the upwash of the mainsail.
This means that the top of the foresail is very close to the front of the mainsail at a height where there is still an ample amount of chordlength in the mainsail.
The foresail operates in the twisted flow of the apparent wind, with upwash induced by itself due to taper and sweep, and in the upwash field of the mainsail.