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Cost comparison of copper in each prototype.
| Parameter | Prototype 4 | Prototype 11 |
|---|---|---|
| Coil diameter (mm) | 25 | 25 |
| Copper wire diameter (mm) | 0.4 | 0.8 |
| Spires in powered coil | 40 | 20 |
| Spires in induced coil | 80 | 40 |
| Volume of copper wire used (mm3) | 1184 | 2369 |
| Price of copper for Prototype (€) | 0.42 | 0.85 |
