Arizona republican., 1918-01-06
LIBERTY MOTOR ID UNIVERSALlE
 AUTO OF FUTURE

Within the past few months the minds of most Americans have dWelt often and hopefully on a production hat has been named the Liberty nutor, the standard airplane engine produced hy the United States govern ncHt to help in the subjugation of the inspe1kuble Hun. The motor car owner of today may not see much connection between his favorite sport and the above mentioned fact. but strangely enough enormous strides in 1lrplauc engine construction that have been made during the war, are going O have a very direct bearing on the automobile power plant of tomorrow. n other words. the lessons learned in The eNacting school of military neces- 'ity are going to dictate that develop nrut of the automobile engine during Hrm- the next few years.
 This is, in d way. poetic justice. for hc HiTplauc would never have been 'nssihIr without the internal combus- ion cu4iuc. which reached relative 'crfcctinu through the development or ho motor ear. Now the airplanc can gels ils original debt. by developing ho Internal combustion power plant still higher degree of perfection Han tn" motor car had reached, The whole subject is of enough interest to ven Inc casual car owner, to justify a brief review of the field To begin with the designer of the 1ircraft engine has to keep always be- fore him three essentials. weight '1WFr and fuel economy. These he must achieve or his design is worth less.
 In the beginning rne airplane en- sine designer started with what was practically a motor car power plant To each his three desiderata, he has in- creased the power of the engine. re duccd its weight. reduced it's fuel con sumption. increased it's fabrication ef- ticienCN perfected its carburetine sys- tenn and it's ignition. All these inn prONcments are certain to be. in fact are already being, copied by designers ui motor car engines, insofar as they apply to the surface type of vehicle.
 The airplane designer started witt the same materials that his confrerC of the land had used, the same metals the same methods. Intensive eXperi. mcntatOn, however showed him many tlinSs about heat treatment and al Toys of metal that had never beer dreamed of before. He learned how to make steels of unimagined tough
 
 to produce what would have been miracle five years ago, an engine de vclopins a horsepower for every tw, methods of getting and retaining highe methods of getting and retining highe compression, the airplane designer in creased the power of his engine, whil he was reducing it's weight.
 One problem that gave the airplan designer many anxious hours was tha 1t increasing the fueI economy of hi power plant. Obviously. an airpian engine might fulfill every requiremen as to speed and power. but if it con sumed foo much gasoline to achfev those qualities the plane would be un able to carry enough fuel to give tn vehicle the necessary cruising radiu. For this reason the airplane engineer concentrated much of their attentio ou this problem of reducing gasolin consumption. without reducing eithe speed or power Tha; they have sue cecded in harmonizing all these varie and seemingly almost mutually de S,ructiNc requirements. is attested b tHn fact that they have produce planes that can travel at,the rate c l5O miles per hour and having a cruis ing radius of 800 or GOO miles. It impossible in the brief space availabl here to go into details of how this en was achieved. suffice it that the mote ear engine of the future is going { show fuel economy undreamed of 1 the power plants of today. simply be cause of the lessons learned in plan design.
 In the course of their striving aftc greater power, aircraft designers hay learned many things in regard crankcase rici1itv and gasketing TT importance of leak proof easketing withstand the high compression of Il airplane engine, had added to oI knowledge immensely and unquestior ably tine lessons will he applied
 assh't in getting greater power in pro portion 10 engine size from the DO helum power plants.
 Another respect in which the ai1 plane engineer has added to ol knowledge, is in increasing compac