Propeller

1. A method of manufacturing a propeller having a plurality of blades, each of the plurality of blades having an intake portion, an exhaust portion, and a tip portion extending from the intake portion to the exhaust portion, the method comprising:

defining a plurality of parameter sections by selecting some of the parameters including skew angle, roll angle, rake, radius, pitch angle, and vertical angle values;

defining the plurality of parameter sections so a root of the exhaust portion is forward of a root of the intake portion when extending outward from a hub, and skew is continually decreasing;

extrapolating between the plurality of parameter sections to form smooth lines to form a blade of the plurality of blades configured to form a loop when attached to the hub; and

attaching the plurality of blades to the hub to form the propeller.

2. The method of claim 1 further comprising defining the plurality of parameter sections to include a roll value of 90 degrees in the tip portion.

3. The method of claim 1 comprising aligning the plurality of parameter sections along a non-helical median line.

4. The method of claim 1 comprising defining one or more parameters for the parameter sections by the parameters to cause the amount of non-axial lift in the intake portion to be less than the non-axial lift in tip portion.

5. The method of claim 1 comprising defining one or more parameters for the parameter sections by the parameters to cause the amount of non-axial lift in the exhaust portion to be less than the non-axial lift in the tip portion.

6. The method of claim 1 comprising selecting the parameters for the one or more parameter sections such that the tip portion has a 90 degree roll angle closer to the exhaust portion than to the intake portion.

7. The method of claim 1 wherein the plurality of parameter sections are planar.

8. A propeller comprising:

a plurality of blades, each of the plurality of blades having an intake portion, an exhaust portion, and a tip portion extending from the intake portion to the exhaust portion;

a hub;

the plurality of blades extending outward from the hub and disposed around the hub;

each blade forming a loop;

each blade comprising a plurality of parameter sections having selected some of the parameters including skew angle, roll angle, rake, radius, pitch angle, and vertical angle values;

a parameter section of the plurality of parameter sections at a transition from the intake portion to the tip portion defined by parameters to cause the amount of non-axial lift in the tip portion to be greater than the axial lift in the tip portion;

a parameter section of the plurality of parameter sections or an area between consecutive parameter sections of the plurality of parameter sections in the tip portion having a roll value of 90 degrees; and

a root of the exhaust portion is forward of a root of the intake portion when extending outward from the hub, and skew is continually decreasing.

9. The propeller of claim 8 comprising the plurality of blades each having an irregular helical median line.

10. The propeller of claim 8 wherein the plurality of blades are configured so non-axial lift in the intake portion is less than non-axial lift in tip portion.

11. The propeller of claim 8 wherein the plurality of blades are configured so the amount of non-axial lift in the exhaust portion to be less than the non-axial lift in the tip portion.

12. The propeller of claim 8 wherein the tip portion has a 90 degree roll angle closer to the exhaust portion than to the intake portion.