the present invention generally relates to a propulsion apparatus for imparting thrust to a person . the propulsion apparatus is configured so as to be disposed or mounted on the user such that the thrust is transmitted to the rear of the user &# 39 ; s pelvic area . the propulsion apparatus may , for example , include a motor which is connected to a propeller for providing forward thrust . the propulsion , apparatus may , in particular , be used in association with skis for travelling over a snow covered surface ; however , it may be used in association with other similar or analogous devices for travel over the same or other surfaces .