Since aircraft of the period were not yet capable of carrying large diameter bombs the burden of delivering heavy firepower fell on the artillery.

Rail transport proved to be the most practical solution because the problems of heavy weight, lack of mobility and reduced setup time were addressed.

To load the gun barrel was lowered and a shell was brought forward by an elevated hoist on the rear of the carriage.

[3] The guns consisted of a large rectangular steel base, which was suspended on two eight-axle articulated rail bogies manufactured by Schneider.

Once in firing position, a section of rail bed was reinforced with wood and iron beams to support the weight of the gun.

When the gun fired the entire carriage recoiled a few feet and was stopped by the friction of the beams on the tracks.