Airships past and present, together with chapters on the use of balloons in connection with meteorology, photography and the carrier pigeon . Schwarz, made a balloon with arigid envelope, but the ascent on the Tempelhofer Feld in 1897was unsuccessful. Marey Monge and Dupuis Delcourt hadalready proposed in 1831 and 1844 to construct the body of metaland this was actually done. But their efforts failed in conse-quence of the insufficient rigidity of their design and the leaks DIRIGIBLE BALLOONS FROM 1883 TO 1897. 59 which occurred at the joints. Schwarzs balloon was constructedof aluminium, 0*00
Airships past and present, together with chapters on the use of balloons in connection with meteorology, photography and the carrier pigeon . Schwarz, made a balloon with arigid envelope, but the ascent on the Tempelhofer Feld in 1897was unsuccessful. Marey Monge and Dupuis Delcourt hadalready proposed in 1831 and 1844 to construct the body of metaland this was actually done. But their efforts failed in conse-quence of the insufficient rigidity of their design and the leaks DIRIGIBLE BALLOONS FROM 1883 TO 1897. 59 which occurred at the joints. Schwarzs balloon was constructedof aluminium, 0*008 in. thick, which was* supported on a stifflattice-work, made of tubes of the same metal. The shape waspeculiar, but it was probably owing to difficulties of constructionthat it was impossible to use the form, which had been alreadyfound, as the result of many experiments, to offer the leastresistance to the air. The ascent was undertaken by a soldierout of the Balloon Corps, and he was driven in the direction of thewind. The belts driving the propellers came off their pulleys,one after another, and in consequence of serious leaks the. Fig. 31.—Schwarzs balloon after the accident. balloon came to the ground in a short time at a distance of 4miles from the starting point. Great injury was done by theshock on coming to earth, but the soldier escaped by jumpingfrom the car before it reached the ground. Soon afterwards itwas completely destroyed by the wind. The way in which rigid bodies of this type are filled with gasmust be here described. It is not possible to pass the gasdirectly into the balloon, as this would merely cause a mixtureof air and gas. Schwarzs balloon was 156 ft. long, and con-tained 130,000 cubic feet. It was filled by Captain von Sigsfeld,who passed a number of bags into the balloon, and inflatedthem with gas. After it was filled the bags were pulled topieces and torn out again. Another method consists in placing 60 AIKSHIPS PAST AND PKESENT. a linen envelop
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Keywords: ., bookcentury1900, bookdecade1900, bookpubl, booksubjectaeronautics
