Two remarks:
1. Guns, of the type depicted in European manuscripts of the early 14th century, are depicted in China in the late 12th century.
2. A smooth bore tank gun fires at a muzzle velocity of some 1.6 km/s. Using a larger calibre, say 200 or 300 mm, and liquid fuel should give a muzzle velocity of 1.8 to 2.0 km/s, enough for your range of 200 km, and without burning out your electronics. Adding a rocket motor could significantly increase the range. Using control fins and electronic guidance should provide for precision delivery on land. A target seeker might enable you to hit a ship.
A ship carrying such a weapon should be called a monitor. Can it be built as a railway gun?
1. Guns, of the type depicted in European manuscripts of the early 14th century, are depicted in China in the late 12th century.
2. A smooth bore tank gun fires at a muzzle velocity of some 1.6 km/s. Using a larger calibre, say 200 or 300 mm, and liquid fuel should give a muzzle velocity of 1.8 to 2.0 km/s, enough for your range of 200 km, and without burning out your electronics. Adding a rocket motor could significantly increase the range. Using control fins and electronic guidance should provide for precision delivery on land. A target seeker might enable you to hit a ship.
A ship carrying such a weapon should be called a monitor. Can it be built as a railway gun?