Jan. 1 to Apr. 1 to July 1 to Oct. 1 to Name of engine Mar. 31 June 30 Sept. 30 Nov. 8 Total Liberty 12, Army 122 1,493 4,116 4,093 9,824 Liberty 12, Navy 142 633 1,710 1,087 3,572 Hispano-Suiza 180 h.p. ... ... 185 284 469 Later the Statistical Department of the War Department issued the following. The number of planes and engines shipped by the Bureau of Aircraft Production to depots and storehouses from the date of the armistice to February 14: Liberty 12 service engines 4,806 OX-5 elementary training-engines 1,261 Le Rhone advanced training-engines 994 De Havilland-4 observation planes 524 Hispano 180 advanced training-engines 343 Hispano 150 advanced training-engines 254 JN6-H advanced training-planes 174 JN4-D elementary training-planes 131 The Packard Motor Car Company made the final deliveries of Liberty 12 motors during the week ended March 21, 1919. This completes all contracts. The following shows the number and per cent produced by each factory: Number P.C. Firm produced of total Packard Motor Car Co. 6,500 32 Lincoln Motor Co. 6,500 32 Ford Motor Co. 3,950 19 General Motors Co. 2,528 12 Nordyke & Marmon Co. 1,000 5 ——— Total 20,478 THE HISPANO-SUIZA It is evident from the records made by the German Mercedes, which are given in another chapter, that it was the best aviation motor in existence in July, 1914. Naturally, this motor had considerable influence on the aeronautical engineers of the Allies. Mr. Marc Birkright, a Swiss engineer to the Hispano-Suiza Company, automobile builders in Barcelona, Spain, and Paris, designed the aviation motor which now holds the world’s record for altitude—28,900 feet. When he designed the motor he had in mind the construction of the machine-tools necessary to build the same. In the summer of 1915 the first motor of 150 horse-power was delivered to France after a test of 15 consecutive hours. The next two were tested for 50 hours, and proved satisfactory. France placed a large order, and the Hispano-Suiza factory began production at the end of 1915. Before the end of the war three Italian, fourteen French, one British, one Japanese, and one Spanish factory, besides 25,000 people in America, were producing Hispano-Suiza engines. The motor had great success in the single-seater fighters flown by such men as Captain Georges Guynemer, Lieutenant Fonck, Nungesser, and dozens of other aces. With the exception of increasing the horse-power from 150 to 180, 200, 300, very few changes were made in this motor in this country.