From a flat strip to the curve of a hull — without snapping, scorching, or splitting.
Most planking problems aren't really planking problems — they're bending problems. A plank that has been bent to shape before it touches the hull glues down cleanly, holds its line, and looks like it grew there. A plank forced into place with clamps and hope will fight you for the rest of the build. This guide walks through the four techniques fellow modellers actually use, when each one is the right tool, and the small details that make the difference between a clean curve and a cracked strip.
A ship's hull is a compound curve — planks rise toward the bow, fall away at the stern, and twist as they wrap the bilge. A flat strip glued straight onto that shape will either spring off overnight or pull the frames out of alignment. Pre-bending relaxes the wood into the shape you need so that, by the time glue comes out, the plank is already asking to sit where you want it.
Pick by the severity of the curve and the thickness of the strip:
The most forgiving method, and the one most beginners underuse. Lay strips flat in a shallow tray of room-temperature water for 20–30 minutes. Pull one out, pin it to a curved form (a printed plank pattern taped to a piece of foam works well), and let it dry overnight. The strip takes a permanent set at roughly 80–90% of the form's curve.
Works beautifully for fruitwoods like Swiss pear at 0.6–1 mm. Skip it for Alaskan yellow cedar in thicker sections — it absorbs water unevenly and can cup.
The workhorse of plank-on-bulkhead modelling. Soak the strip in hot tap water for 10–15 minutes, then press it against the bulkheads with the tip of a small travel iron set to medium. The water inside the wood flashes to steam and the lignin softens for a few seconds — long enough to coax the strip into the curve. Hold for 5–10 seconds, lift the iron, move along.
Keep the iron moving. A spot held too long scorches the surface, especially on pale woods like castello boxwood. If you smell it, you've already gone too far.
For square strips, keel doublers, or any piece thicker than about 2 mm. A simple setup: a kettle, a length of copper or PVC pipe capped at one end, and a damp cloth at the open end to trap the steam. Ten minutes inside is enough for most ship-model stock; thicker pieces need fifteen to twenty.
Have your form clamped and ready before you open the pipe — you have maybe 30 seconds of working time before the wood stiffens again. Wear gloves.
Not really bending at all — it's controlled compression along one edge of a flat strip, so the strip curves in its own plane rather than out of it. Use it for the natural sweep of a plank line along the hull.
Soak the strip, then pin one edge to a curved line drawn on a flat board. Gently press the opposite edge inward as you pin along its length. The fibres on the inside of the curve crush slightly; the outside stretches. Let it dry, and the strip holds the curve without any out-of-plane warp.
Too dry, or bent too tight too fast. Re-soak and approach the curve in stages.
It hasn't fully dried on the form, or it didn't get hot enough during bending. Leave it on the form an extra 24 hours, or repeat with the iron.
Iron too hot, or held in one spot. Sand lightly with 240 grit — if the mark is shallow it disappears.
You're trying to edge-bend a curve that's too tight for the strip's width. Switch to a narrower strip, or accept a small spiling cut.
Species-specific bending notes are based on general woodworking experience and community knowledge — always test a short piece before bending full planks on your build.