Propellers and equipped therewith turbomachine and / or driving machine

It will be a propeller (1) is proposed that has at least projecting a from a rotation center portion (5) propeller blades (4) which has a a frame opening (18) framing outer frame structure (13). The frame opening (18) without tension, covered by a flexurally flexible membrane, the membrane surface is greater than that of the membrane (22) covering the opening area of ​​the frame opening (18) so that the diaphragm (22) depending on the rotational direction of the propeller (1) in each other opposite directions is auswolbbar. This adaptive behavior allows effective utilization of the propeller (1) in both directions of rotation (3a, 3b).