A Cantilever Beam Linkage is disclosed for a mechanism and structural support to power and control a cantilever beam in reciprocal motions, by adopting and using planar 4-bar parallelogram linkages, typically for drive mechanisms, into mechanisms to function as guided roller supports, free to translate but fixed for rotational motions; and as load separators where forces and moments are separated. A Cantilever Beam Linkage is applicable for a cantilever beam in reciprocal motions to have its powering and controlling applied forces confined within narrow bodies, to have the cantilever beam extends out multiple times the narrow body width, and to have applied forces equal to response forces; and is particularly suitable for applications such as: a rowing boat oar and a flying machine flapping wing.

A Cantilever Beam Linkage is disclosed for a mechanism and structural support to power and control a cantilever beam in reciprocal motions, by adopting and using planar 4-bar parallelogram linkages, typically for drive mechanisms, into mechanisms to function as guided roller supports, free to translate but fixed for rotational motions; and as load separators where forces and moments are separated. A Cantilever Beam Linkage is applicable for a cantilever beam in reciprocal motions to have its powering and controlling applied forces confined within narrow bodies, to have the cantilever beam extends out multiple times the narrow body width, and to have applied forces equal to response forces; and is particularly suitable for applications such as: a rowing boat oar and a flying machine flapping wing.

A paddle mount for a boat is described. The mount includes a generally t-shaped tubular body including a flange and a stem, where the length of the flange and the stem is adjustable and the ends of the flange are configured to rest on opposite sides of the boat cockpit. The mount is configured to couple to the front end of the cockpit and to an end of the stem, such that the t-shaped body may be rotated upwards away from the boat. A mount adapter is also described that may be used to attach a paddle to the boat using the mount.

A paddle mount for a boat is described. The mount includes a generally t-shaped tubular body including a flange and a stem, where the length of the flange and the stem is adjustable and the ends of the flange are configured to rest on opposite sides of the boat cockpit. The mount is configured to couple to the front end of the cockpit and to an end of the stem, such that the t-shaped body may be rotated upwards away from the boat. A mount adapter is also described that may be used to attach a paddle to the boat using the mount.

The invention involves a paddleboard kit for converting any water sports board such as a surfboard into a paddleboard. An oar support assembly, typically secures oars with pivotal paddles to the board; facilitating rowing exercises that may be practiced while kneeling or standing. During use, the pivotable paddles pivot in such a way that the blade portion holds a steady position in relation to a shaft portion on the power stroke, whilst being free to fold in the opposite sense on the idle stroke when each stroke is executed as a substantially axial thrust of the shaft. The oar support assembly secures the pair of oars and is itself secured to the board by way of board couplers adjustably coupled to a portion of a strap that tightens to snuggly wrap around the board.

The invention involves a paddleboard kit for converting any water sports board such as a surfboard into a paddleboard. An oar support assembly, typically secures oars with pivotal paddles to the board; facilitating rowing exercises that may be practiced while kneeling or standing. During use, the pivotable paddles pivot in such a way that the blade portion holds a steady position in relation to a shaft portion on the power stroke, whilst being free to fold in the opposite sense on the idle stroke when each stroke is executed as a substantially axial thrust of the shaft. The oar support assembly secures the pair of oars and is itself secured to the board by way of board couplers adjustably coupled to a portion of a strap that tightens to snuggly wrap around the board.

The invention involves a paddleboard kit for converting any water sports board such as a surfboard into a paddleboard. An oar support assembly, typically secures oars with pivotal paddles to the board; facilitating rowing exercises that may be practiced while kneeling or standing. During use, the pivotable paddles pivot in such a way that the blade portion holds a steady position in relation to a shaft portion on the power stroke, whilst being free to fold in the opposite sense on the idle stroke when each stroke is executed as a substantially axial thrust of the shaft. The oar support assembly secures the pair of oars and is itself secured to the board by way of board couplers adjustably coupled to a portion of a strap that tightens to snuggly wrap around the board.

The invention involves a paddleboard kit for converting any water sports board such as a surfboard into a paddleboard. An oar support assembly, typically secures oars with pivotal paddles to the board; facilitating rowing exercises that may be practiced while kneeling or standing. During use, the pivotable paddles pivot in such a way that the blade portion holds a steady position in relation to a shaft portion on the power stroke, whilst being free to fold in the opposite sense on the idle stroke when each stroke is executed as a substantially axial thrust of the shaft. The oar support assembly secures the pair of oars and is itself secured to the board by way of board couplers adjustably coupled to a portion of a strap that tightens to snuggly wrap around the board.

An oarlock-installation for a boat in which an oarlock is mounted on an upright pin for angular displacement about the pin during rowing of the boat, the oarlock-installation comprising a mechanism for deriving measurements of angular displacement of the oarlock from a datum angle about the pin during the rowing, a mechanism for deriving measurements of force exerted on the oarlock during the rowing, and a mechanism for deriving measurement of rowing power from the measurements of force and the measurements of angular displacement. The rowing-boat oarlock-installation may also comprises a power module, attached to the oarlock, which is responsive to rowing of the rowing-boat to derive force measurements in accordance with rowing forces exerted on the power module during the rowing.

An oarlock-installation for a boat in which an oarlock is mounted on an upright pin for angular displacement about the pin during rowing of the boat, the oarlock-installation comprising a mechanism for deriving measurements of angular displacement of the oarlock from a datum angle about the pin during the rowing, a mechanism for deriving measurements of force exerted on the oarlock during the rowing, and a mechanism for deriving measurement of rowing power from the measurements of force and the measurements of angular displacement. The rowing-boat oarlock-installation may also comprises a power module, attached to the oarlock, which is responsive to rowing of the rowing-boat to derive force measurements in accordance with rowing forces exerted on the power module during the rowing.