. The railroad and engineering journal . enant Graydon has since pre-pared plans for a gun to be operated by compressed of these is to be constructed abroad, and the accom-panying illustrations Irom Lc Genie OwV show the planwhich he has adopted. Fig. i shows the gun carried upona circular mount. The gun shown is intended to carry ashell charged with dynamite, and is expected to have arange of about three miles. The gun itself is a tube of Whit worth forged steel weigh-ing about II tons. It is mounted, as shown, on a carriageworking on rollers on a circular track. The gun itself isprov
. The railroad and engineering journal . enant Graydon has since pre-pared plans for a gun to be operated by compressed of these is to be constructed abroad, and the accom-panying illustrations Irom Lc Genie OwV show the planwhich he has adopted. Fig. i shows the gun carried upona circular mount. The gun shown is intended to carry ashell charged with dynamite, and is expected to have arange of about three miles. The gun itself is a tube of Whit worth forged steel weigh-ing about II tons. It is mounted, as shown, on a carriageworking on rollers on a circular track. The gun itself isprovided with trunnions through a circular opening in one group of them being shown outside in fig. i. Theyare tested to a pressure of 4 tons per square inch and areexpected to contain air at the pressure of 350 are so arranged in connection with the gun that airfrom any number of them may be admitted to the gun atonce. The reservoirs and the piston valves which regu-late the discharge of the air are of Whitworlh compressed. steel. The reservoirs are charged from the air-com-pressor through pipes passing through the central pivot ofthe lower turret. The movement of the carriage upon theturret is regulated by hydraulic cylinders also, and it isclaimed that one man can regulate the carriage, load andfire the gun. The air-compressor built for use in connec-tion with this gun has four cylinders. Fig. 2 shows the projectile in section. In order to pre-vent premature discharge, the explosive is made in smalltubes or balls which are enclosed in paper saturated inparaffin. They are then placed in the cavity of the shelland separated by layers of paper. In order to secure thegreatest possible penetration of the shell before explosiona spring is inserted, as shown, above the tube containingthe exploder. It is understood that an extensive series of experimentsis to be undertaken with this gun in England and proba-bly in France also. Vol. LXV, No. II.] ENGINEERING JOURNAL. 497
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectrailroa, bookyear1887
