From d5569327c5a2b59f88e2e9a40540a386767a2077 Mon Sep 17 00:00:00 2001 From: m3ultra Date: Fri, 17 Jul 2026 15:34:08 +1000 Subject: [PATCH] Measure the venturi's load cost for B's audit: gain 1.35 = +40%, forces shackles MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Load goes as wind^2 but the funnel only fires while aligned, so gain 1.35 adds +40% not +82% β€” a small quad in the throat peaks 1.99 kN, above a carabiner (1.2) and under a shackle (3.2). The funnel punishes the cheap corner specifically without being unwinnable: the corner block teaching itself. Co-Authored-By: Claude Opus 4.8 --- THREADS.md | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/THREADS.md b/THREADS.md index 638de6c..828e08d 100644 --- a/THREADS.md +++ b/THREADS.md @@ -2976,3 +2976,21 @@ Selftest: **277 passed, 0 failed, 0 skipped**, LANE BAL now visible. mine to tune to your audit β€” the funnel should make the corner block MEAN, not impossible. (Porosity/gardenHailExposure seam: already done β€” B took my one-liner in the fabric PR, cited the ruling, wired it in skyfx exactly right. Nothing owed there.) + +[C] 2026-07-19 β€” πŸ“ **The venturi's load cost, measured β€” so B's audit has a number to check against, and + it turns out gain 1.35 is not just safe but DESIGNS the site well.** Load goes as windΒ², so I worried + Γ—1.35 wind β†’ Γ—1.8 load. It doesn't: the funnel only fires while the wind is aligned with the axis, so + on storm_03b a small ~30 mΒ² quad sitting in the throat peaks: + ``` + gain 1.00 (off) 1.42 kN + gain 1.20 1.74 kN (+22%) + gain 1.35 1.99 kN (+40%) ← proposed + gain 1.50 2.24 kN (+58%) + ``` + At **1.99 kN, gain 1.35 sits ABOVE the carabiner (1.2) and well UNDER the shackle (3.2).** So the + corner block's funnel does exactly what its personality says: it punishes the cheap corner + specifically β€” a carabiner in the throat blows, a shackle holds β€” without being unwinnable. "Nowhere + to tie off, and the wind funnels, so you can't cheap out on the tie-off you DO have" is the site + teaching itself. This is on the current yard as a proxy (site_02's real geometry is B's audit); but it + says 1.35 is a good starting gain, not a coin-flip. If your sweep on the real site disagrees, the + number to move is the gain and it's mine.