Xem Studiomeasured geometry

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Chines and reverse chine

What does a chine do on a boat hull? · Standard part · basis: Design rules and figures from the cited sources; example geometry by Xem Studio

Also called: chine, reverse chine, hard chine, chine flat, chine walk, soft chine, boat chine lift, rc boat chines, chine angle

Exact dimensions. True size, with no printing tolerance added.

sizes
1 in table

Notes

  • The chine is where hull sides meet bottom. A small flat pad at the chine (about 1-2 in) adds lift so the boat planes sooner and resists listing on plane (Boat Blurb).
  • A reverse chine turns down at the edge to trap water for more lift, allowing a steeper V; chine walk is a side-to-side rolling oscillation (Boat Blurb).
  • The file is a reference example built by Xem Studio from the numbers above (Reference RC mono: 585 mm length and 20 deg transom deadrise (SV Design Stealthwake data); 181 mm is an unlabelled width in the same source's deadrise diagram.). Sizes the sources do not fix are illustrative; scale the example to your own vehicle.

Chines and reverse chine size chart

parametervalue or rangesource
Chine flat widthabout 1-2 inBoat Blurb

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

Boat BlurbWhere is a chine on a boat and what does it do?webPublisher's page; dimensions are facts

Free files

★ Free files 1 parts. Xem Studio design: free to use, print and sell things from; not to be republished as files. Xem Studio Design License. index.json

chines-reverse-chine-hulldeep v hull, 585 × 181 mm, deadrise 22° (sections illustrative, scale to your boat)STEP · STL
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Plain text: sheet.txt · JSON: /api/geometry?object=chines-reverse-chine

Chines and reverse chine, isometric render of a generated part
Render of chines-reverse-chine-hull from the free STEP; not to scale.

Fits with

Deep-V hull, isometric render of a generated part
Deep-V hull6 sizes★ 1 file
Modified-V (semi-V) hull, isometric render of a generated part
Modified-V (semi-V) hull2 sizes★ 1 file
Flat-bottom hull, isometric render of a generated part
Flat-bottom hull1 sizes★ 1 file
Cathedral (tri-hull), isometric render of a generated part
Cathedral (tri-hull)2 sizes★ 1 file
Tunnel hull (tunnel catamaran), isometric render of a generated part
Tunnel hull (tunnel catamaran)4 sizes★ 1 file
Three-point hydroplane, isometric render of a generated part
Three-point hydroplane4 sizes★ 1 file

Questions

What is chine walk?

The boat rolls side to side as one chine digs in (Boat Blurb).