| 摘要 |
Apparatus characterised in that it comprises a base for one formed by : parallel bars 2 in a lateral direction, supporting parallel bars 3 in a longitudinal direction, the base being surmounted by feet 5 and 7; bars 10 coupled to other bars 11, supporting a roller 12 coupled to a pinion 13 and located so as to rub against the rear of the rear wheel of a bicycle employed for the purpose: gearing 14; a drive shaft 15; a flexible drive shaft 16; a propeller 17; a rudder 18; and arms 20 connecting stabilizers 21 to the base 1 of the apparatus. <IMAGE>
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