Composite flywheel

1. A flywheel comprising:

a wheel having a width W, and a composite rim bilayer spiral structure comprising multiple radial layers of porous steel web material and multiple radial layers of porous nonmetallic fiber partition web material, each having about the width W, spiraled around a central axis of the wheel, forming alternating radially adjacent layers of porous steel web material and porous nonmetallic fiber partition web material, the radial layers of the porous steel web material having cavities therein and are separated from each other by the radial layers of the porous nonmetallic fiber partition web material in a sandwiching spiraling manner; and

an adhesive bonding the sandwiching spiraling radial layers of porous steel web material and porous nonmetallic fiber partition web material together, the spiraling layers of the porous steel web material being continuously radially adjacently bonded to adjacent higher strength composite spiraling layers of the porous nonmetallic fiber partition web material and spirally locked together.

2. The flywheel of claim 1 in which the porous steel web material and the porous nonmetallic fiber partition web material are wound from continuous lengths into the bilayer spiral configuration.

3. The flywheel of claim 2 in which the porous steel web material is formed from alloy steel.

4. The flywheel of claim 3 in which the alloy steel is stainless steel.

5. The flywheel of claim 4 in which the stainless steel comprises stainless steel fibers.

6. The flywheel of claim 5 in which epoxy adhesive is vacuum impregnated into spaces between the stainless steel fibers and radial layers of the stainless steel web material.

7. The flywheel of claim 6 in which the stainless steel web material comprises a web of stainless steel mesh.

8. The flywheel of claim 3 in which the porous nonmetallic fiber partition web material is formed of carbon.

9. The flywheel of claim 1 in which the porous steel web material is in mesh form and the porous nonmetallic fiber partition web material is in cloth form.

10. The flywheel of claim 1 further comprising a metallic core member having an outer perimeter around which the composite rim structure is positioned.

11. The flywheel of claim 10 further comprising a central shaft on which the core member is mounted.

12. The flywheel of claim 1 in which surfaces of the steel are treated to remove at least one of rust and oil.

13. The flywheel of claim 1 in which surfaces of the steel are treated to increase surface area for bonding with the adhesive.

14. The flywheel of claim 1 in which surfaces of the steel are treated with a rust inhibiting protective coating.