Lyon was a ship designed befor the breakout of WWI it was never built. However, in WoWS, we have a late-WWII modernized ship.
Lyon's modernized superstructure somewhat blocked her gun's firing sector and she must sail almost abroadside to fire a salvo.
| Hit Points | 53400 |
| Plating | 25mm |
| Armor Belt | 180mm – 300mm |
| Torpedo Damage Reduction | 16% |
| Maximum Speed | 27 knots |
| Turning Radius | 700 m |
| Rudder shift time | 14.1 sec |
| Surface Detectability | 15.84 km |
| Aerial Detectability | 11.52 km |
| In-smoke Firing Detectability | 13.37 km |
| Consumable 1 |   |
| Consumable 2 |   |
| 340mm/45 Mle 1912 | |
| Layout | 4x4, A-P-XY |
| Reload Time | 30sec |
| 180° Rotation Time | 45 sec |
| Sector of Fire | ±138° |
| Firing Range | 20.63 km |
| Maximum H-Dispersion | 268 m |
| σ | 1.8 |
| 340mm HE OEA Mle 1934 | |
| Damage | 4700 |
| Muzzle Velocity | 921 m/s |
| Chance of Fire | 26% |
| 340mm AP OPfK Mle 1930 | |
| Damage | 9500 |
| Muzzle Velocity | 780 m/s |
| Penetration @ 5/10/15 km | 496/403/320 |
| Firing Range | 5.0km |
| 130mm/45 Mle 1932 | |
| Layout | 4×4 + 4×2 |
| Reload Time | 5 sec |
| HE Damage | 1900 |
| Chance of Fire | 9% |
| 130mm/45 Mle 1932 | ||
| Layout | Average DPS | Firing Range |
| 4×4 + 4×2 | 83 | 5.2 km |
| 40mm Bofors Mk2 | ||
| Layout | Average DPS | Firing Range |
| 4×4 | 64 | 3.5 km |
| 40mm Bofors Mk3 | ||
| Layout | Average DPS | Firing Range |
| 16×1 | 122 | 3.5 km |
| 20mm Oerlikon Mk20 | ||
| Layout | Average DPS | Firing Range |
| 8×2 | 49 | 2.0 km |
| 20mm Orelikon Mk4 | ||
| Layout | Average DPS | Firing Range |
| 14×1 | 50 | 2.0 km |
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