Abstract: A counter-rotating fluid-propelling apparatus uses an oblong drive mechanism being oriented substantially orthogonal to the axes of rotation of a pair of counter-rotating impellers and which temporarily and simultaneously engages the edges of the impellers while they are in substantial contact. Each impellers can include a number of substantially rectangular planar panels, hingedly connected to one another along common edges to vertices. Each impeller has an axis of rotation that passes lengthwise through the middle of the impeller such that the axis is parallel to and equidistant from the panel edges. The impellers counter-rotate and remain in constant contact with respect to one another. During each revolution of the impellers, each of the panels of one impeller contacts its counterpart on the other impeller so that planar panels meet flat surface to flat surface and vertex to vertex. The impellers collapse so that constant contact is maintained.

Abstract: A counter-rotating fluid-propelling apparatus uses an oblong drive mechanism being oriented substantially orthogonal to the axes of rotation of a pair of counter-rotating impellers and which temporarily and simultaneously engages the edges of the impellers while they are in substantial contact. Each impellers can include a number of substantially rectangular planar panels, hingedly connected to one another along common edges to vertices. Each impeller has an axis of rotation that passes lengthwise through the middle of the impeller such that the axis is parallel to and equidistant from the panel edges. The impellers counter-rotate and remain in constant contact with respect to one another. During each revolution of the impellers, each of the panels of one impeller contacts its counterpart on the other impeller so that planar panels meet flat surface to flat surface and vertex to vertex. The impellers collapse so that constant contact is maintained.

Abstract: A counter-rotating fluid-propelling apparatus (800) comprises at least two identical interlocking counter-rotating bodies (801, 802) having a number of rectangular flat panels (811-814), each panel having planar surfaces, and each body having an axis of rotation that passes lengthwise through the middle of the body such that the axis is parallel to and equidistant from the longer edges of the panels. The operation of the apparatus begins with the bodies having a panel from each body abutting against each other. The bodies then counter-rotate with respect to each other driven by a motor (860), such that the panels separate while the vertices between panels remain in contact. This counter-rotating operation causes a displacement of ambient fluid residing beneath the apparatus in a downward motion due to the coming together of panels, and displacement of ambient fluid above the apparatus downward into a vacuum formed due to the separation of panels.

Abstract: A rotating wing apparatus comprises two identical rectangular flat panels, each panel having planar surfaces, and each panel having an axis of rotation that passes lengthwise through the middle of the panel such that the axis is parallel to and equidistant from the longer edges of the panel. The operation of the apparatus begins with the panels lying flat side-by-side, with a longer edge of each panel abutted against a longer edge of the other panel. The panels then “fold downwards” with respect to each other, hinging at the abutted longer edges, such that each panel rotates about its axis at the same rate as the other panel but in a direction opposite that of the other panel, and such that the axes move towards each other, until a surface of each panel comes flat against a surface of the other panel.