Abstract: A “V”-shaped sail is mounted to flexible tubular members. The tubular members are permitted to flex as wind speed increases. This lowers the effective center of effort and the area of the sail and increases the stability of vessels and vehicles to which the sail is mounted without the need for operator involvement. The sail frame is mounted to a “Y” shaped yoke having a cylindrical stem. The stem is inserted into a locking base that permits rotation of the stem in 30 degree increments while preventing the stem from being removed from the anchor while the sail is set at an operating angle. The locking base can be mounted permanently or temporarily to the vessel and vehicle. One unique aspect of this invention is that no lines (sheets) or similar apparatus are required for any operational function of raising, lowering or sailing this sail kit.

Abstract: Row unit lift structure includes electrohydraulic proportional valves connected to an electronic controller which receives inputs from a manual raise/lower switch, a rate response potentiometer, and height control potentiometers in the cab. Signals are also received from row unit height sensing transducers, a tachometer and shaft rotation sensors. When the units are lowered and operational, the controller compares the signals from the height sensing transducers with the signals from the height control potentiometers and sends an electrical control signal to the proportional valves to maintain a selected row unit height. The magnitude of the control signal and thus the rate of correction of height are determined by the rate response potentiometer and the amount of variation between the actual and desired row unit height.

Abstract: Row unit lift structure includes electrohydraulic proportional valves connected to an electronic controller which receives inputs from a manual raise/lower switch, a rate response potentiometer, and height control potentiometers in the cab. Signals are also received from row unit height sensing transducers, a tachometer and shaft rotation sensors. When the units are lowered and operational, the controller compares the signals from the height sensing transducers with the signals from the height control potentiometers and sends an electrical control signal to the proportional valves to maintain a selected row unit height. The magnitude of the control signal and thus the rate of correction of height are determined by the rate response potentiometer and the amount of variation between the actual and desired row unit height.

Abstract: A “V”-shaped sail is mounted to flexible tubular members. The tubular members are permitted to flex as wind speed increases. This lowers the effective center of effort and the area of the sail and increases the stability of vessels and vehicles to which the sail is mounted without the need for operator involvement. The sail frame is mounted to a “Y” shaped yoke having a cylindrical stem. The stem is inserted into a locking base that permits rotation of the stem in 30 degree increments while preventing the stem from being removed from the anchor while the sail is set at an operating angle. The locking base can be mounted permanently or temporarily to the vessel and vehicle. One unique aspect of this invention is that no lines (sheets) or similar apparatus are required for any operational function of raising, lowering or sailing this sail kit.