Disciplines efoil
The Blackbird Mid-Length Infinity has 3 sizes in the current range, from 45 to 70 L. Its slenderness, 3.33, is greater than that of 68% of the 1,895 current boards that publish a length and a width.
No current board from another brand is within ±7% of volume and ±2% of length, and ±2% of slenderness where both publish a width of this one. Boards for wake, eFoil, kite or windfoil alone are compared only with each other.
None of these is within the tolerances above: each misses on volume, length or slenderness by up to 3.4× the tolerance.
| Brand | Board | Volume L | Δ volume | Length mm | Δ length | Slenderness | Mount |
|---|---|---|---|---|---|---|---|
| Axis | Pocket Trench 50L | 50 | +11.1% | 1,600 | -0.6% | 3.25 (-2.4%) | — |
| North | Boost 2026 5ft 3in | 45 | +0.0% | 1,600 | -0.6% | 3.15 (-5.5%) | twin-track |
| Axis | Pocket Trench 40L | 40 | -11.1% | 1,500 | -6.8% | 3.12 (-6.3%) | — |
| Family | Blackbird |
|---|---|
| Model | Blackbird Mid-Length Infinity |
| Size, as the brand prints it | 5'2" × 19" 45L |
| Volume, L | 45 |
| Length, mm | 1,610 (5'3") |
| Width, mm | 483 |
| Thickness, mm | — |
| Weight, kg | 4 |
| Slenderness (length ÷ width) | 3.33 |
| Slenderness band | 3.0–4.0 |
| Mount | — |
| Strap inserts | yes |
| Build | — |
| Construction | PVC/Carbon/Fiberglass Laminate |
| Disciplines | efoil |
| Rider weight | — |
| Rider level | — |
| Model year | — |
| Source | manufacturer · read 2026-10-02 |
Every figure above is the manufacturer's published claim, converted to comparable units.