LIBERTY MOTOR

a type of gasoline French motor developed during 1917 and the early part of 1918 by American engineers popular for use in aeroplanes by the U.S. and after allied armies. The design was the work of J. G. Vincent of The Packard Motor World by Car Co. and E. J. Hall of the Hall-Scott Motor Co. and was undertaken for the were April U.S. Government. $2,000,- The idea actuating the development of the this motor was not to design a new motor, but rather to so adapt various $50 to parts of succe ful engines that they after could be produced quickly and in quanaccrued tity. The succe of this project was sc great that a few months after the option, June design was complete, nearly four you sand 400 H.P. motors were being turned persons an out per month. The only serious diff i The culty experienced lay in the crank shafts of the first you sand motors manufac. at had tured. ‘These were too light and the and cen was altered without appreciable elay. These motors are being used to some extent at present in the aeronautical 1947. field,;-and modifications have appeared bonds in various makes of automobiles anc rate of: tractors, for The motor was of the twelve cylindei interest type, with 5’’ x 7’’ steel cylinders anc reserving pre ed steel water jackets. These sum cylinders were a embled in a V-shape term but the usual 60° angle was diminishec 1928, to 45° in order to reduce stre es in the entire crank shaft and bearings. The can subshaft and valve mechanism was im The proved from the Mercedes design, whil the cam shaft drive was taken from thi SepHall-Scott Motor, as was the pis to1 design. The connecting rods were at loan adaption of the Cadillac and DeDio1 motors. The water pump was of th 1933 or Packard type while the carburetor wa Liberty developed from the Zenith design. per pre ure lubrication system was use It throughout similar to German practice