A drive device for an aircraft, comprising - a blade which can be rotated about an axis of rotation of the drive device along a circular path; - a pitch mechanism having a coupling device and a bearing device, - wherein the blade is mounted by the bearing device for pivoting about a blade bearing axis parallel to the axis of rotation of the drive device; and - an offset device to which the blade is coupled by the coupling device at a connection point, wherein the offset device defines an eccentric bearing axis which is mounted at an adjustable offset distance parallel to the axis of rotation of the drive device, - such that the rotation of the blade along the circular path about the axis of rotation of the drive device effects a pitch movement (a) of the blade when the offset distance is set to a nonzero value; and - wherein the coupling device is coupled to the blade at a coupling point, wherein the coupling point is positioned in such a way that the plane that comprises the blade bearing axis and the coupling point and the tangential plane to the circular path through the blade bearing axis include a certain, non-vanishing angle (w α) when the offset distance is set to zero; wherein the certain, non-vanishing angle (w α) is set in such a way that the angle between - the plane that comprises the blade bearing axis and the coupling point and - the plane that comprises the axis of rotation of the drive device and the connection line from the coupling point to the axis of rotation is almost 90° when the offset distance is set to zero, and wherein the coupling point of the coupling device at the blade is positioned outside of the blade profile. - a blade which can be rotated about an axis of rotation of the drive device along a circular path; - a pitch mechanism having a coupling device and a bearing device, - wherein the blade is mounted by the bearing device for pivoting about a blade bearing axis parallel to the axis of rotation of the drive device; and - wherein the blade is mounted by the bearing device for pivoting about a blade bearing axis parallel to the axis of rotation of the drive device; and - an offset device to which the blade is coupled by the coupling device at a connection point, wherein the offset device defines an eccentric bearing axis which is mounted at an adjustable offset distance parallel to the axis of rotation of the drive device, - such that the rotation of the blade along the circular path about the axis of rotation of the drive device effects a pitch movement (a) of the blade when the offset distance is set to a nonzero value; and - wherein the coupling device is coupled to the blade at a coupling point, wherein the coupling point is positioned in such a way that the plane that comprises the blade bearing axis and the coupling point and the tangential plane to the circular path through the blade bearing axis include a certain, non-vanishing angle (w α) when the offset distance is set to zero; wherein the certain, non-vanishing angle (w α) is set in such a way that the angle between - the plane that comprises the blade bearing axis and the coupling point and - the plane that comprises the axis of rotation of the drive device and the connection line from the coupling point to the axis of rotation is almost 90° when the offset distance is set to zero, and wherein the coupling point of the coupling device at the blade is positioned outside of the blade profile. - such that the rotation of the blade along the circular path about the axis of rotation of the drive device effects a pitch movement (a) of the blade when the offset distance is set to a nonzero value; and - wherein the coupling device is coupled to the blade at a coupling point, wherein the coupling point is positioned in such a way that the plane that comprises the blade bearing axis and the coupling point and the tangential plane to the circular path through the blade bearing axis include a certain, non-vanishing angle (w α) when the offset distance is set to zero; wherein the certain, non-vanishing angle (w α) is set in such a way that the angle between - the plane that comprises the blade bearing axis and the coupling point and - the plane that comprises the axis of rotation of the drive device and the connection line from the coupling point to the axis of rotation is almost 90° when the offset distance is set to zero, and wherein the coupling point of the coupling device at the blade is positioned outside of the blade profile. - the plane that comprises the blade bearing axis and the coupling point and - the plane that comprises the axis of rotation of the drive device and the connection line from the coupling point to the axis of rotation is almost 90° when the offset distance is set to zero, and wherein the coupling point of the coupling device at the blade is positioned outside of the blade profile.