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stephen thomas

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About stephen thomas

  • Birthday 08/18/1962

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  • Location
    Colac Australia
  • Occupation
    Engineer

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  1. A WW2 20mm is a very different thing from even a modern 20mm let alone a future weapon. Penetration is about mass, material, geometry and velocity (we're talking KE rouds here) 20 mm rounds over time will all be around the same mass, but materials, geometry and velocity are seriously different. Velocity is the key and the path to high velocities is a long barrel and a big bang. the calibre, 20mm, limits the bang although modern propellants are a lot better than WW2 types. So it comes down to barrel length. Barrel length is usually expressed in calibres. A WW2 german 20mm is around 55 calibres with a muzzel velocity around 800m/s while a modern 20mm is around 100 with muzzel velocities around 1,000./s. Add in fancy materials (DU) and clever geometry (saboted long rod) and you have a 20 mm with a lot of penetration. In the future? Who knows. We already have some experimental guns delivering 1,500m/s...... The othe aspect of high muzzel velocities, is flat trajectories. Haven't played the game as yet so can't comment. All the foregoing remarks apply to the other calibres too!
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