A passive mechanical system for moving against fluid flow

Always the extraordinary phenomena are interesting for everybody. Sometimes a simple idea can leads to amazing results. Here, we will consider the special case of the interaction of the fluid flow and a propeller. Usually, the interaction of the fluid flow and a propeller divided into the two categories. In the first category the rotation of a propeller generates a flow in the fluid and in the second category, the fluid flow rotates a propeller. The first is energy consuming and the second one is energy generating. In some special conditions we can make a closed loop for generating and consuming the energy. In this paper I will offer a simple mechanical sketch for a device to move against the fluid flow direction without any external energy source. In fact by using some simple rules and principles of Newtonian mechanics, the suggested device can move against fluid flow direction using the energy of fluid itself. Such devices are important because of their capability for access to points, out of other types of energy, for example the end of deep and high flow rate wells such as oil and gas wells; or for design of any device to go forward and backward with same flow directions.