There is a problem here. If you mean a gun 18.1 inches long, it cannot shoot 26 miles. If you mean a gun that fires a shell 18.1 inches in diameter, that is a very rare large cannon- and THOSE would be hard pressed to fire a shell 26 miles. There were no 48" diameter cannon. Please rephrase your question, or post a message on my message board, and we will try to get you an answer.
The projectile can travel up to 1.5 miles
The projectile can travel up to 1.5 miles
The range is not directly related to bore diameter. And the largest gun over built (The Tsar bombard) has a 36" bore.
Depends on the caliber, barrel length, projectile weight.
About 181 miles.
181 miles
about 181 miles
181 miles
Miles
120 miles
It is 181 miles according to Google Maps.
It is 181 miles taking I-10 EAST.