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A water ski has an upper side, an under side, a front end and a rear end, with an arched fin carried on the ski under side at the ski rear end. The arched fin has opposed edges adjacent the edges of the ski under side, with the opposed edges joined together adjacent the ski rear end to form an openi

A water ski has an upper side, an under side, a front end and a rear end, with an arched fin carried on the ski under side at the ski rear end. The arched fin has opposed edges adjacent the edges of the ski under side, with the opposed edges joined together adjacent the ski rear end to form an opening for water flow therethrough, and with the opposed edges tapering forward and upward from the opening to the ski under side, and terminating forward of the ski rear end. The arched fin and ski form a continuous channel for water flow along the bottom of the ski toward the rear end, preferably with the cross-section area of the forward end of the channel is greater than the cross-section area of the rear end of the channel.

대표청구항 ▼

[ I claim:] [1.] A water ski comprising:an upper side, an under side, a front end and a rear end, with an arched fin carried on said ski under side at said ski rear end;said arched fin having opposed edges adjacent the edges of said ski under side, with said opposed edges joined together adjacent sa

[ I claim:] [1.] A water ski comprising:an upper side, an under side, a front end and a rear end, with an arched fin carried on said ski under side at said ski rear end;said arched fin having opposed edges adjacent the edges of said ski under side, with said opposed edges joined together adjacent said ski rear end to form an opening for water flow therethrough; andwith said opposed edges tapering forward and upward from said opening to said ski under side, and terminating forward of said ski rear end, the opposing edges of said ski converge toward each other at the rear portion of said ski, and the opposing edges of said arched fin conform to said edges of said ski.