Blueprint: Counter-Rotating Vertical-Axis Wind Array — One-Hectare Patch (from DOI 10.5281/zenodo.24109304)

DESIGN BLUEPRINT — SIMULATED, NOT MEASURED — NOT BUILT. A manufacturable blueprint package for the counter-rotating vertical-axis wind array specified in DOI 10.5281/zenodo.24109304, built exactly as designed and carrying its limit on its face. The rotor is a straight-bladed vertical-axis machine 1.2 m in diameter and 1.8 m high, swept area 2.16 m2, three blades of 0.12 m chord, solidity 0.30, tip-speed ratio 2.0-4.0 with design point 3.0, isolated power coefficient 0.25, rated 440.2 W at 11.0 m/s, cut-in 3.0 and cut-out 25.0 m/s. Rotors are grouped in counter-rotating pairs at 1.5 rotor diameters centre-to-centre (0.6 m tip gap) on a pair pitch of 4.24 diameters, allocating 12.96 m2 per rotor — 771.6 rotors per hectare. Under a Rayleigh wind with mean 5.5 m/s at rotor height, mean power per rotor is 82.31 W under an adverse interaction assumption of 0.85, 94.02 W neutral, 104.84 W at 1.15 and 114.84 W at 1.30 (all interaction factors are stated assumptions in the source, not measurements), giving patch land densities of 6.35, 7.26, 8.09 and 8.86 W/m2 on its own hectare. THE LIMIT, ON THE FACE: that excess is edge-fed — supplied by air flowing in from around and above the patch — and extended over a landscape the mean density returns to the atmospheric replenishment bound of 0.5-1.0 W/m2 under every assumption. Cost is printed at full size: $1,350 per rotor installed, $3.067 per rated watt, $14.36 per mean watt, $1,041,667 per hectare, and 385.8 maintenance visits per hectare per year. The package gives a bill of materials at component-class level, layout and sizing rules, an assembly sequence, commissioning and acceptance tests, operating limits including the survival overturning moment of 1,323 Nm, and failure modes. Nothing was built or field-tested.