aparelho para oscilar uma folha em um fluido

摘要

The invention relates to an apparatus for oscillating a foil in a fluid. The apparatus according to the invention comprises a first crank mechanism and a second crank mechanism connected to a foil. Said first crank mechanism and said second crank mechanism have different crank pin offsets, are functionally connected such that when driven the speed of revolution of said first crank mechanism is the same as the speed of revolution of said second crank mechanism, and are out of phase with each other.