Flat-sided crankbait
A slab of wood with a small lip, built for a tight, quick wiggle rather than a big roll.
What is a flat-side?
A flat-sided crankbait has a thin profile and a small diving lip. This Tank build uses a single lip cell and a low row of ballast to test how a compact lip works against a strong righting force.
What the model actually measures
The grid uses 1 cm cells. The Tank computes displaced water, centre of mass, lip force, tracking stability and wobble at its default retrieve speed. It does not predict a running depth or a catch rate. See the equations and limits.
Cedar body, a single-cell lip on the nose, six lead slugs in a full belly row, no rattle.
Tank verdict: Swims
Swims, but barely moves. It is so heavily righted that the lip cannot push it off-axis — a stiff, tight, lifeless action.
- Length
- 80 mm
- Mass
- 19.0 g
- Buoyancy
- floating
- Stability
- 9.55
- Wobble
- 1.0 / 10
- Tempo
- 8.9
- Take out some low ballast or add lip area to loosen it up.
- Line tie is almost on top of the lip. Very little leverage, so the action will be muted.
Compare with the medium diver
Both designs run through the same Tank model at its default retrieve speed. These figures describe the block builds shown here, not commercial lures.
Scroll the table sideways to compare every measure →
| Model output | Flat-side | Medium diver |
|---|---|---|
| Length 1 cm cells | 80 mm | 80 mm |
| Lip area number of cells | 1 | 2 |
| Buoyancy | floating | floating |
| Stability righting / overturning; N/A without lip force | 9.55 | 2.58 |
| Wobble model scale / 10 | 1.0 | 3.8 |
| Swim verdict | Swims | Swims |
Across 72 fish scenarios
Eaten in 3 of 72 scenarios, and the top-ranked lure in 0 of them. Outcomes: ignored 40 · refused 14 · followed 9 · not detected 6 · eaten 3.
Other archetypes
A generic archetype drawn in Tank blocks, not a product, and the Tank works in one-centimetre cells rather than real dimensions. See how the Tank works and where it is wrong.