Square-bill crankbait
Short, deep-bodied and buoyant, with a stubby lip set just under the nose. The shape builders reach for when the bait has to deflect off shallow wood and rock.
What is a square-bill?
A square-bill is a short, buoyant crankbait with a broad, shallow lip. In this Tank build, that lip supplies the dive and wobble while low ballast keeps the body upright.
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.
Balsa body, a two-cell lip below and ahead of a nose tie, three lead slugs low and aft of centre, one rattle chamber.
Tank verdict: Swims
Swims. A moderate wobble at medium tempo — a balanced, all-round crankbait action.
- Length
- 80 mm
- Mass
- 10.2 g
- Buoyancy
- floating
- Stability
- 1.78
- Wobble
- 5.4 / 10
- Tempo
- 6.6
- 1 rattle chamber: adds an acoustic signature the lateral line reads before the eyes do.
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 | Square-bill | Medium diver |
|---|---|---|
| Length 1 cm cells | 80 mm | 80 mm |
| Lip area number of cells | 2 | 2 |
| Buoyancy | floating | floating |
| Stability righting / overturning; N/A without lip force | 1.78 | 2.58 |
| Wobble model scale / 10 | 5.4 | 3.8 |
| Swim verdict | Swims | Swims |
Across 72 fish scenarios
Eaten in 6 of 72 scenarios, and the top-ranked lure in 3 of them. Outcomes: ignored 28 · refused 24 · followed 8 · eaten 6 · not detected 6.
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.