. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . riot is shown coupled to the tender. The following are the particulars ofthe boiler as given in the Bulletin: The firebox is 4 feet (1 mt. 30) long,2 feet 4 inches (0 mt. 75) wide, and isplaced between two double fonds ofcast iron, filled with water and com-municating with the interior of the the bottom of the firebox there isanother cast iron piece, also full of November, 1918 RAILWAY AND LOCOMOTIVE ENGINEERING 351 water, which communicates with theboiler, which is fixed on it. The
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . riot is shown coupled to the tender. The following are the particulars ofthe boiler as given in the Bulletin: The firebox is 4 feet (1 mt. 30) long,2 feet 4 inches (0 mt. 75) wide, and isplaced between two double fonds ofcast iron, filled with water and com-municating with the interior of the the bottom of the firebox there isanother cast iron piece, also full of November, 1918 RAILWAY AND LOCOMOTIVE ENGINEERING 351 water, which communicates with theboiler, which is fixed on it. The grateis composed of two rows of 17 bars, andthere are 43 small fire tubes. The whole,with water, weighs 3000 kilos (). The tension of the steam isthree atmospheres above that of ordinarypressure. m/mt per metre () which is nearthe limit after which it becomes impos-sible to mount by the simple friction ofthe wheels of the locomotive on the Saint Etienne to Rive de Giers itis 13m/mt per metre () over alength of 18,600 metres. The date of Seguins Patent is incor-. THE SfiGUIN BOILER. Weight of engine and tender 6,000 ; pounds), price 10,000 francs. SquareHeating Surface. metres. Cylindrical part 2 demi bases or flat part 43 tubes in the boiler 2 double bottoms on the 2 sides of the firebox Reservoir of water under the boilerto supply the feed pump Total Say 231/2 square metres= sq. ft. Particulars of Engine. Diameter of pistons mt Stroke of pistons Density of steam in atmospheres Each cylinder filled twice forone turn of crank or one cy-linder four times Number of turns of crank per hour 3600 Volume of 1 Kilo, of Steam at 135 degrees or 3 atmospheres 1922 Experiment. The engine taking up empty chariotsand the two blowers working, 100 kilosof coal were burned in one hour, and 785kilos of water were taken from the reser-voir. One square metre of heating sur-face evaporated i
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