{
  "name": "Tunnel book plan-view model (closed and fully open)",
  "desc": "Plan-view tunnel-book model: for the closed and the fully open book, the depth of the pull, each panel's distance behind the front cover and each window's half-width, in millimeters. Only these two states are listed because only they fix every panel's position; the qualifier column says so on every row. Computed by the paper-mechanism model paper-mech 1.0.0 and re-issued with paper-mech 1.1.0, values unchanged (strip panels 12 mm); paper thickness is not modeled.",
  "lic": "CC BY 4.0",
  "lic_url": "https://creativecommons.org/licenses/by/4.0/",
  "by": "Fold, Knot & Bind",
  "url": "https://foldknotbind.com/paper-mechanisms/tunnel-book/",
  "from": [
    "Computed by the Fold, Knot & Bind paper-mechanism model paper-mech 1.0.0, re-issued with paper-mech 1.1.0 on 2026-11-15 with values unchanged (tunnel model, strip panel 12 mm, states closed and fully open), 2026-11-14"
  ],
  "how": "Compiled by Fold, Knot & Bind from the data listed"
}