Show bi big bertha berth big bertha had a firing distance of 75 falles the principle oo on which this long distance guo gun was operated to in that it if a shell Is ig fired upward at an tingle of 55 degrees to the horizontal and at a high velocity so that the shell will rise above the dense atmosphere mo sphere close to the earths earth a surface and rapidly reach the thin air which exists at a height of ten miles above the earth then kg its flight will be practically unimpeded and it will travel a great distance before it falls again during its flight from the big bertha the german shell rose to a height of 24 miles and traveled more than 50 miles of its course la in a very thin atmosphere |