| 摘要 |
A multi-functional modular device comprises: a shaft; electric motor(s); battery(s); thrust producing fan(s); and blade(s) being removably attachable to the shaft for levering of a paddlesports boat. With the blade(s) attached to the shaft and the motor(s) off, the device is usable for manual levering, and with the motor(s) on, the fan blade thrust may selectively assist in levering to propel the paddlesports boat. Fan thrust may be usable in a direction opposite to a propulsive direction of levering to reduce work required per stroke, which reduces power per stroke, or may alternatively be usable in the same direction as propulsive levering to increase total propulsive power per stroke, which requires greater strength/work output by the rower/paddler. Various sized blades may be interchangeable therein to adjust the work output. Removing the blade(s) permits the fan to be statically submerged and clocked to propel the boat in a desired direction.
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