Abstract: The invention relates to a profile sail boom for a boat having a batten mainsail, which is configured to be flexible in the horizontal direction and has a vertical spar with cords laminated in at the uppermost and lowermost points in the center of the cross-section, transverse webs separated by wedge-shaped spacer joints extending from said spar on the lowermost site in the horizontal direction, wherein guiding tubes for cords are present on the outer edges of said webs.

Abstract: The invention relates to a roller reefing boom (1 in FIG. 1) for a boom sail set with sail battens, preferably a mainsail (6), of a ship (2) with a partially enclosing sail stowage space (27) of aluminum or Faserplast, in which a largely planar sail (6) can be reefed or stowed by rolling it up, wherein the trimming of the sail (6) in all reefing states is achieved by the roll reefing boom (1) comprising a number of segments (11, 12, 14) which can be swung away horizontally in relation to one another, making the sail (6) that is guided by them adjustable variably according to the strength of the wind by means of internal control devices (37 and 76) with fixed profile characteristics (23 a and 23 b) in the depth of the profile (24).

Abstract: The invention relates to a profile sail boom for a boat having a batten mainsail, which is configured to be flexible in the horizontal direction and has a vertical spar with cords laminated in at the uppermost and lowermost points in the center of the cross-section, transverse webs separated by wedge-shaped spacer joints extending from said spar on the lowermost site in the horizontal direction, wherein guiding tubes for cords are present on the outer edges of said webs.

Abstract: The invention relates to a method for automatically coupling and decoupling the luff of a battened mainsail and stackable luff holders as the connecting link between the sail luff and mast guiding slides, thereby allowing the now free sail luff to be reefed up by means of an in-boom furling boom and allowing the battened mainsail to be hoisted and reefed by means of mast guiding slides.

Abstract: The invention relates to a roller reefing boom (1 in FIG. 1) for a boom sail set with sail battens, preferably a mainsail (6), of a ship (2) with a partially enclosing sail stowage space (27) of aluminium or Faserplast, in which a largely planar sail (6) can be reefed or stowed by rolling it up, wherein the trimming of the sail (6) in all reefing states is achieved by the roll reefing boom (1) comprising a number of segments (11, 12, 14) which can be swung away horizontally in relation to one another, making the sail (6) that is guided by them adjustable variably according to the strength of the wind by means of internal control devices (37 and 76) with fixed profile characteristics (23 a and 23 b) in the depth of the profile (24).

Abstract: The invention relates to a method for automatically coupling and decoupling the luff of a battened mainsail and stackable luff holders as the connecting link between the sail luff and mast guiding slides, thereby allowing the now free sail luff to be reefed up by means of an in-boom furling boom and allowing the battened mainsail to be hoisted and reefed by means of mast guiding slides.