. Scientific American Volume 85 Number 06 (August 1901) . old, theexhaust passing directlyto the condensers. Thetotal ratio of expansion, itwill be seen, is addition to the low-pressure turbines on thetwo outer or wing shafts,there are additional tur-bines, placed inside the ex-haust ends of the low-pres-sure turbines, which areused in going are in all five pro-pellers—one upon the cen-ter high - pressure turbineshaft, and two upon each•of the outer low-pressure•.shafts, the outer shaftsoeing used in going feed pumps are drivent>v separate engines, as are
. Scientific American Volume 85 Number 06 (August 1901) . old, theexhaust passing directlyto the condensers. Thetotal ratio of expansion, itwill be seen, is addition to the low-pressure turbines on thetwo outer or wing shafts,there are additional tur-bines, placed inside the ex-haust ends of the low-pres-sure turbines, which areused in going are in all five pro-pellers—one upon the cen-ter high - pressure turbineshaft, and two upon each•of the outer low-pressure•.shafts, the outer shaftsoeing used in going feed pumps are drivent>v separate engines, as arealso the forced draft fan $ftuutiiu ^mmau. and the circulating pumps for the condenser. Themain air pumps are worked by means of worm-gearingfrom the wing, or outer, shafts, the details of one ofthese pumps being shown very clearly in our illus-tration. In addition, there are auxiliary air pumpswhich are driven by the circulating pump are used for emptying the condensers of waterwhen they are not in operation. The boilers are dou- 89. THE FBAME OF THE SANTOS-DUMONT, SHOWING THE HELIX AND THE BASKET CAB. ble-ended, of the return-tube type, with four furnacesat each end. The motors, the condensers full of water, the steampipes, the auxiliaries, the shaft, propellers, etc., weighaltogether 66 tons; and as the indicated horse poweron the trial trip is estimated to have been 3,500, itwill be seen that the engines compare favorably with
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