# The Wind Line

## Premise
At 8 m/s (17.9 mph), argon shielding gas collapses around a TIG/MIG arc. Oxygen intrusion begins within 0.3 seconds. The weld pool oxidizes. The joint fails.

## Source
- **Standard**: AWS D1.1 Structural Welding Code — Steel
- **Section**: 5.2 Environmental Controls
- **Threshold**: 8 m/s maximum wind velocity for gas-shielded processes

## The Math
```
Critical Velocity (v_c) = 8 m/s
Shielding Integrity = 1 - (v / v_c)^2
When v ≥ v_c: Integrity → 0
```

## Related Work
- [Wind Factor Calculator](../wind-factor/) — Interactive predictor of shielding collapse
- [Impact Calculus](../../impact-calculus/) — Spallation dynamics at hypervelocity

## Film Metadata
- **Duration**: 60 seconds
- **Voice**: af_nova (synthetic, grounded)
- **Music**: Midnight Casting (4ort.live track 51e9f8a1a662)
- **Render**: 4ort.mov hyperframe pipeline

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*Built by Bernardo Zubko, Pine Ridge Reservation.*