Librascope' Mechanical Balance computer elevated and set into black painted wooden case with handle. Used to calculate an aircrafts centre of gravity and total weight; 15 knobs set into computer display which gauge weight of oil, bombs, bow compartment etc. and 2 at extreme right which allow for adjustments of weight and balance. Two dials at top; left gauges total weight in pounds and right shows centre of gravity position. Silhouette of Catalina plane appears on computer display in middle.
PBY-5 / BU. Aero. U.S. Navy / Contract No. / Nos 99588 / Librascope / Reg. U.S. Pat. Off. / Balance Computer / Serial No. 1145 / Type LC-1 Maker's Mark
Manufactured by / Librascope, Incorporated / Burbank, California, U.S.A. / Under U.S. Patent no. 2,179,822 / Other patents pending Maker's Mark
Librascope Incorporated. Mechanical Balance Computer [Librascope], 2006.418. The Museum of Transport and Technology (MOTAT).