A method of moving a propeller (1) relative to a medium (2) at least partially enclosing a propeller (1), wherein an actuator comprises a rotation axis (4) of the propeller (1) relative to the medium (2). A method of inducing rotation of a propeller (1) which causes the propeller (1) to translate its rotational movement into movement of the propeller (1) relative to a medium (2). At least one cross section (5) of the propeller (1), the cross section (5) associated with the axis of rotation of the propeller (1) has an aspect ratio of 3 or more. Or at least one cross section of a rotor comprising a propeller (1) and a part (10) of the medium (2) which is separated from the rest of the medium (2) by the rotation of the propeller (1) and rotates with the propeller (1) (5), and the aspect ratio of the cross section (5) associated with the rotation axis (4) of the rotating body is 3 or more. Furthermore, a helical or modified helical propeller (1), wherein the rotational movement of the propeller (1) with respect to the medium (2) at least partially enclosing said propeller (1) of the propeller (1). In a helical or modified helical propeller (1) for converting into movement, at least one cross section (5) of the propeller (1), the cross section (5) being associated with the helical axis of the propeller (1). Has an aspect ratio of 3 or more. A method of manufacturing a propeller (1) comprising: (1) defining a straight helix axis； and (2) providing a plate (17) extending along the helix axis, the method comprising: One cross section (5), wherein the aspect ratio of the cross section (5) associated with the spiral axis is greater than or equal to 3, and (3) applying torque to the plate (17) along the spiral axis, By twisting the plate (17) into a spiral shape.プロペラ（１）を少なくとも部分的に包囲する媒体（２）に対してプロペラ（１）を移動させる方法であって、アクチュエータが媒体（２）に対するプロペラ（１）の回転軸（４）を中心とするプロペラ（１）の回転を誘発し、プロペラ（１）がその回転運動を媒体（２）に対するプロペラ（１）の移動に変換させる、方法。プロペラ（１）の少なくとも１つの断面（５）であって、プロペラ（１）の回転軸に関連付けられた断面（５）のアスペクト比が３以上である。又は、プロペラ
