9f83fd4f20
Implemented and swept fraction-of-total downdraft: it pincers exactly like gust-only did. The cause is not the semantics, it's the bar. A pitched sail's normal is still 96% vertical, so a downdraft loads it too, and on its worst heading pitch and downdraft add: |d| = 0.287 + 0.958f against the horizontal sail's f. The ratio asymptotes at 109% and needs f=0.86 (28 m/s of falling air) to reach 60%. No value works under any semantics. Recommend retiring it as a wind problem. DESIGN.md's own answer is ponding, and the arithmetic dwarfs wind (1250 kg vs 8 kg of fabric vs 1 kN of wind) — but it can't bite in 90 s without a ~40x time-compression fiat, so it's an M4 item with an owner, not a Sprint 3 fix. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> |
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| .claude | ||
| prototype | ||
| tools | ||
| web/world | ||
| .gitignore | ||
| DESIGN.md | ||
| LANE_PROMPTS.md | ||
| PLAN3D.md | ||
| server.py | ||
| SPRINT2.md | ||
| SPRINT3.md | ||
| THREADS.md | ||