Fan, turbine or pump with a substantially helically shaped blade, wherein the fluid intake is axially aligned to a longitudinal axis. The blade within the fluid intake portion has a flat and/or concave pressure face, and a root that is helically shaped to the longitudinal axis according to a logarithmic, exponential, power or other sequencing such that the tangent to the blade approaches perpendicular alignment to the axis at a first end of fluid intake portion and approaches parallel alignment to the axis at a second end of fluid intake portion. The fluid outlet is longitudinally offset fromthe fluid intake. Alternatively, a second substantially helically shaped portion has an opposite chirality to the first substantially helically shaped portion.