. Scientific American Volume 92 Number 04 (January 1905) . t be expected to oc-cupy from twelve to fifteen days. Hence forevery 100 horse-power of the engine it willbe necessary to carry 4,500 gallons of fuel,occupying approximately 723 cubic feet ofspace and weighing 15 tons, or more, if fuelsheavier and less efficient than petrol be em-ployed. To complete the absurdity, the Calais-Dover racer would require, to enable it tocross the Atlantic, a bulk of petrol of greaterweight and greater displacement than theboat itself. Seemingly nothing smaller thana torpedo-boat destroyer could attempt to
. Scientific American Volume 92 Number 04 (January 1905) . t be expected to oc-cupy from twelve to fifteen days. Hence forevery 100 horse-power of the engine it willbe necessary to carry 4,500 gallons of fuel,occupying approximately 723 cubic feet ofspace and weighing 15 tons, or more, if fuelsheavier and less efficient than petrol be em-ployed. To complete the absurdity, the Calais-Dover racer would require, to enable it tocross the Atlantic, a bulk of petrol of greaterweight and greater displacement than theboat itself. Seemingly nothing smaller thana torpedo-boat destroyer could attempt to ful-fill the conditions laid down, and for a vesselof these dimensions an engine of 500 horse-power would not be excessive. Ocean-Going Motor Boats. Mr. W. E. H. Humphries, a Cambridge science grad-uate who has devoted himself to the study of the useof high-power internal combustion engines for sub-marine vessels and is a practical motorist of wide ex-perience, writing on motor-boat building in the publi-cation To-day, says that the folly of those makers. The 4,000-mile reliability trial of a motor-carwhich has been made under supervision of the BritishAutomobile Club was brought to a successful conclu-sion on December 7, 1904. The trial was undertakenby Capt. Deasy in a 16 to 20^horse-power Martini carfitted with Dunlop tires and weighing empty 23%hundredweight. A distance of 4,002 miles was cov-ered under ordinary touring conditions, and under thecontinuous observation of officials appointed by • theclub. The daily run consisted of a maximum of 200miles a day on main roads, starting from and returningto the Automobile Club. The number ofdays occupied was 22, the total gasolineconsumption 245% gallons, the total con-sumption of water gallons, the averagedaily mileage , the average mileageper gallon of fuel , and the averagemileage per gallon of water 1,015. Theroads throughout the trial were somewhatheavy and greasy, and there was muchfog. Rain and snow and numb
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