A ski includes an elongated ski body having a bottom layer defining a bottom surface of the ski, a top layer defining a top surface of the ski, and a middle layer disposed between the bottom layer and the top layer, in which the middle layer includes a negative Poisson's ratio (NPR) foam material having a Poisson's ratio of between 0 and −1.

A ski includes an elongated ski body having a bottom layer defining a bottom surface of the ski, a top layer defining a top surface of the ski, and a middle layer disposed between the bottom layer and the top layer, in which the middle layer includes a negative Poisson's ratio (NPR) foam material having a Poisson's ratio of between 0 and −1.

Systems and methods are provided for generating a design for a gliding board. The methods involve operating a processor to: define a desired carved turn of the gliding board; define a desired global curvature profile; generate a desired deformed shape of the gliding board during the desired carved turn; generate a sidecut profile of the gliding board; generate a width profile of the gliding board; generate a camber profile of the gliding board; generate at least one stiffness design variable profile; generate a total load profile; modify at least the width profile, the sidecut profile and at least one of the at least one stiffness design variable profile at least once; and define the design for the gliding board based at least on the width profile, the camber profile, and the at least one stiffness design variable profile.

Systems and methods are provided for generating a design for a gliding board. The methods involve operating a processor to: define a desired carved turn of the gliding board; define a desired global curvature profile; generate a desired deformed shape of the gliding board during the desired carved turn; generate a sidecut profile of the gliding board; generate a width profile of the gliding board; generate a camber profile of the gliding board; generate at least one stiffness design variable profile; generate a total load profile; modify at least the width profile, the sidecut profile and at least one of the at least one stiffness design variable profile at least once; and define the design for the gliding board based at least on the width profile, the camber profile, and the at least one stiffness design variable profile.

A system, configuration, and method for converting a pair of skis to perform as an emulation snowboard is provided. The system includes a pair of skis, and a coupling device including a platform having an upper planar surface with a plurality of mounting locations with mounting system therein. The mounting system couples the skis together and provides a surface on which a pair of bindings may be affixed. The steps for conversion include providing a pair of skis, removing a ski binding from each ski in the pair of skis, if a binding is installed on either ski in the pair of skis, providing a platform with a mounting system, utilizing the mounting system to affix the platform to each ski in the pair of skis, and attaching a pair of snowboard bindings to the platform.

A system, configuration, and method for converting a pair of skis to perform as an emulation snowboard is provided. The system includes a pair of skis, and a coupling device including a platform having an upper planar surface with a plurality of mounting locations with mounting system therein. The mounting system couples the skis together and provides a surface on which a pair of bindings may be affixed. The steps for conversion include providing a pair of skis, removing a ski binding from each ski in the pair of skis, if a binding is installed on either ski in the pair of skis, providing a platform with a mounting system, utilizing the mounting system to affix the platform to each ski in the pair of skis, and attaching a pair of snowboard bindings to the platform.

A personal self-propelled vehicle for travelling on snow using ski comprises a closed-loop flexible ribbon configured to envelope the ski over its length so as to pass under at least a portion of a sliding surface, two rollers and configured for installation on longitudinally opposite ends of the ski and to interact with the ribbon. The roller is a driving roller and is engaged with a motor comprising a control means and with the ribbon to transfer force for translational movement thereof. The roller is a guiding roller. The ribbon canvas has multiple via openings divided by webs and substantially constitutes a lattice. Dimensions and positions of the openings and parameters of the webs between them are selected so the sliding surface of the ski abuts on snow through the openings during motion of the vehicle, while the webs sink in snow under load of the vehicle bearing the user and provide repulsion from snow packed by the ski, thus assuring the ski sliding in longitudinal direction.

A personal self-propelled vehicle for travelling on snow using ski comprises a closed-loop flexible ribbon configured to envelope the ski over its length so as to pass under at least a portion of a sliding surface, two rollers and configured for installation on longitudinally opposite ends of the ski and to interact with the ribbon. The roller is a driving roller and is engaged with a motor comprising a control means and with the ribbon to transfer force for translational movement thereof. The roller is a guiding roller. The ribbon canvas has multiple via openings divided by webs and substantially constitutes a lattice. Dimensions and positions of the openings and parameters of the webs between them are selected so the sliding surface of the ski abuts on snow through the openings during motion of the vehicle, while the webs sink in snow under load of the vehicle bearing the user and provide repulsion from snow packed by the ski, thus assuring the ski sliding in longitudinal direction.

The running surface of a ski with unique individual tractive elements arranged in a pattern that allow for uphill movement by the skier. Individual tractive elements used on the running surface of a ski that have unique features in the surface design that enable more efficient operation for uphill movement by the skier. Individual tractive elements arranged in a pattern on a ski bottom in such a way that allows for minimum resistance to the snow surface in the glide portion of uphill ski movement, and maximum resistance in the grip (or kick) portion of uphill ski movement. Individual tractive elements that can be used uniquely on a ski bottom where a portion of the ski bottom surface is a device that can be removed and reattached. Individual tractive elements on the running surface of a ski bottom that can be arranged in a unique and optimal array to maximize the functions of uphill glide and uphill kick through movement of the skis by the skier. Individual tractive elements that can be incorporated on a climbing skin used in tractive uphill/forward skiing in a unique array configuration. Individual tractive elements in a unique array configuration that can be incorporated with additional tractive materials on a climbing skin used in tractive uphill/forward skiing.

The running surface of a ski with unique individual tractive elements arranged in a pattern that allow for uphill movement by the skier. Individual tractive elements used on the running surface of a ski that have unique features in the surface design that enable more efficient operation for uphill movement by the skier. Individual tractive elements arranged in a pattern on a ski bottom in such a way that allows for minimum resistance to the snow surface in the glide portion of uphill ski movement, and maximum resistance in the grip (or kick) portion of uphill ski movement. Individual tractive elements that can be used uniquely on a ski bottom where a portion of the ski bottom surface is a device that can be removed and reattached. Individual tractive elements on the running surface of a ski bottom that can be arranged in a unique and optimal array to maximize the functions of uphill glide and uphill kick through movement of the skis by the skier. Individual tractive elements that can be incorporated on a climbing skin used in tractive uphill/forward skiing in a unique array configuration. Individual tractive elements in a unique array configuration that can be incorporated with additional tractive materials on a climbing skin used in tractive uphill/forward skiing.