Build hard Disciplines efoil, prone, downwind
The Foil Drive has 3 sizes in the current range, from 50 to 70 L. Its slenderness, 3.16, is greater than that of 60% 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.
None of these is within the tolerances above: each misses on volume, length or slenderness by up to 1.4× the tolerance.
| Brand | Board | Volume L | Δ volume | Length mm | Δ length | Slenderness | Mount |
|---|---|---|---|---|---|---|---|
| Aeryn | Flux Carbon 5'0 55L | 55 | +10.0% | 1,525 | +0.1% | 3.18 (+0.7%) | twin-track |
| Amos | Sultan RTS 5'0" 18 1/2" 4 7/8" 55L | 55 | +10.0% | 1,524 | +0.0% | 3.24 (+2.8%) | twin-track |
| Armstrong | Midlength Mk II X-Form 45L 5'0'' | 45 | -10.0% | 1,524 | +0.0% | 3.22 (+2.1%) | — |
| Family | Foil Drive |
|---|---|
| Model | Foil Drive |
| Size, as the brand prints it | Foil Drive 50L |
| Volume, L | 50 |
| Length, mm | 1,524 (5'0") |
| Width, mm | 483 |
| Thickness, mm | — |
| Weight, kg | — |
| Slenderness (length ÷ width) | 3.16 |
| Slenderness band | 3.0–4.0 |
| Mount | — |
| Strap inserts | — |
| Build | hard |
| Construction | carbon top and bottom with PVC sandwich on both sides |
| Disciplines | efoil, prone, downwind |
| 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.