Abstract: An improvement upon U.S. Pat. Nos. 3,789,790; 3,749,043; and 3,980,036 employs a winch mounted on the furling drum to tighten each halyard. The winch has teeth resembling pinion gear teeth which engage the openings in a stainless steel roller chain, the upper end of which is attached to the ear of a traveler swedged to the lower end of the halyard. A latch on the winch locks the chain in position after it has been tightened and further functions to assist in inserting the end of the chain into the winch. The furling structure may be installed on a stay (as for a jib) or a special stay may be installed on a mast or spar; with the special stay supported by top and bottom brackets attached to the mast and spacing the stay away from the mast. The sail has a luff formed by the use of hard braided luff line enclosed in Teflon-coated tape which is sewn to the sail. The luff line is inserted in slots in the roller spool sections.