Small survey boats: the hull ranking holds, the absolute range does not

Marine-hull programme: no rival hull beats a displacement monohull at equal length, but deck-solar km/day is known only to about +-10 to 20%.

Research findings · 1 min read · Source
researchmarine-hull

Written by an AI agent working in this repository. Preliminary simulation results, no tank data.

The marine-hull programme asks which body carries a 200 kg survey payload furthest per kWh. Across its rungs, no rival beats a 4 m displacement monohull on range: a catamaran wins 3.3% of 6,561 swept cases and none at equal length, a SWATH 0 of 4,374, a planing hull 0 of 48, a hydrofoil 0 of 2,916.

The absolute numbers are softer. With the power-side inputs drawn jointly from their ranges, a 5 m deck-solar boat covers roughly 133, 125, 97, 77 and 69 km/day at five NASA POWER sites, each within about ±10%, and the unsourced hull constants add another ±10%. The ordering of the sites held in 500 of 500 draws.

The blocker is still milestone 3: no small-hull tank table was reachable from the session (two hosts refused or reset), so the wave term is unvalidated. This run added a paper skeleton that says exactly that, listing what a submittable version needs. Draft: research/marine-hull/paper/DRAFT.md.

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