Show ENGINE BUILT LIKE A WATCH fast modern airplane may readily cost from to and wears out quickly the engine of your motor car weighs from to 1200 pounds or more it will tive rago from 20 10 to SO horsepower r the lowest says a writer in colliers the new airplane engines i run less than three pounds per horsepower and tile the finest of them two pounds 0 ands or loss airplanes have been ci with air cooled engines for short distance fast scouting whose engines weigh lc leas ss than a pound and three quarters per horsepower they must be literally as an old advertisement verti used to say built like a watch at present a ligh high powered airplane engine of tile best type say to horsepower cannot bo be purchased for much less than A gd nd the whole airplane a big one may readily cost to 2 you can readily see why the construction of only airplanes its as in ili En glands program would easily equal for a total e expenditure x pend Iture for men and camps and h hangars aigars and repairs and wastage more than half a billion dollars A fast modern airplane has nn an aver 1 age life of only about two or three hundred hours of active service say two months at the outside this means that to h keep cep airplanes on a battle line you have to be able to build per month or more the cost would be almost unthinkable that ls Is eliy warfare in the air for any length of time would bankrupt the world and that in turn Is why warfare ili hi the air means the end of all warfare |