M1917 Disappearing Carriage for 16-inch Gun

Sample entry from “Illustrated Concrete Battery Guide”

Gun: M1919
Carriages Built: 1
Original Emplacements: 1
Time Emplaced: 1921

Number of Bolts: 16 inner, 14 outer
Circle Diameter: 17′ 9″ inner, 23′ 2″ outer
Parapet Height: 15′
Center-to-parapet: 29′ 8″Notes: 10 steps, Battery J.M.K. Davis, Fort Michie, HD Long Island Sound. Total weight: 835 tons
Max/min elevation: +30 / ­5 degrees
Radius: 360 degreesgun: M1919
Weight: 163 tons
Length: 50 calibers