A sail comprising a rotating flexible mast sleeve wrap surrounding the mast and attached to a sail track for controlling the movement of the sail. The sleeve assembly is slotted to allow for partial rotation of the sleeve wrap, the sail track and the sail, so that the sleeve wrap, the sail track and the sail rotate to form an aerodynamic shape on the lee side of the rotating flexible mast reducing aerodynamic losses.

The invention relates to a sailing rig system (SRS) for a sailing ship comprising one or more airfoil sails comprising one or more sail defining frames including at least three airfoil sail shape-defining edges and/or at least three airfoil sail shape-defining corners. The sail may be controllable, rotatable, pivotable, trimmable, reefable, stowable, slidable, windable, guidable, coaxial, weathervaning, wind/sun tracking, freestanding; it may provide cambering, reinforcing, sealing, boundary layer control, shielding means, sections and connections and it may be transparent. The frame may be a closable/deployable rotor sail frame. The frame may include rig components and the SRS may further comprise vertical/oblique/horizontal spars coupled with spar couplings. It may further comprise lateral, fore-and-aft, superposed sails, actuators, power generators, power sources, thermal management systems, defined rotor sails. It may provide sail twist. It may be coupled with a sailing ship with defined ship couplings. A sailing method is proposed.

A mast fairing for a sailboat includes an upper fairing and an optional lower fairing configured to reduce turbulent airflow over the upwind and downwind sides of a sail. The upper fairing includes a fairing wrap includes a central segment configured to wrap around a mast, a left-side panel, a right-side panel, and a sail track attached to trailing edges of the left- and right-side panels. One or more fairing supports are optionally attached to the sail track between the left- and right-side panels of the fairing wrap. The optional lower fairing includes a central segment, a left-side panel, and a right-side panel configured for installation on a mast and boom below the upper fairing. The upper and lower fairings reduce turbulent airflow over the surfaces of a sail and increase regions of laminar airflow to improve the performance of the sail.

Sail construction comprising foldable sail supports, a crossbeam, a holder, a sail, a bottom holder, ropes and a block and tackle system. The sail can be a self-inflatable sail designed similarly to paragliders, partially or fully inflatable.

Sail construction comprising foldable sail supports (2), a crossbeam (3), a holder (1.1), a sail (1), a bottom holder (4), ropes (4.3) and a bolt and tackle system. The sail can be a self-inflatable sail (1 SN) designed similarly to paragliders, partially or fully inflatable.

A sail furler for a sail boat and method for furling a sail for reefing or storage and for unfurling a sail for use. Furling and unfurling of the sail may be accomplished from the cockpit of the sailboat. A mandrel is mounted to the mast extending generally parallel to the boom and attached to the aft end of boom by an aft plate. The mandrel is mounted in bearings and provided with a removable crank for rotation. The mandrel is connected to the mast by a universal joint and bearing structure over which is provided an outer cylinder. A cylinder and resilient sleeve may be provided on the mandrel. A reef brake extends from the mandrel into contact with the boom to prevent rotation for reefing the sail. A slide guard may be mounted at the mast end of the mandrel.

A sail furler for a sail boat and method for furling a sail for reefing or storage and for unfurling a sail for use. Furling and unfurling of the sail may be accomplished from the cockpit of the sailboat. A mandrel is mounted to the mast extending generally parallel to the boom and attached to the aft end of boom by an aft plate. The mandrel is mounted in bearings and provided with a removable crank for rotation. The mandrel is connected to the mast by a universal joint and bearing structure over which is provided an outer cylinder. A cylinder and resilient sleeve may be provided on the mandrel. A reef brake extends from the mandrel into contact with the boom to prevent rotation for reefing the sail. A slide guard may be mounted at the mast end of the mandrel.