. Aerial navigation . ituting asteam-engine of 8 H. P., representing the weight of 7 men,or say 1,200 lbs., he could obtain a speed of 13^ miles perhour ; but the experiment was not made, and the next indate was THE TISSANDIER ELECTRICAL BALLOON, 1883. Impressed with the belief that recent improvements inelectrical engines afforded a safe and convenient motor forballoons, M. Gaston Tissandier, the distinguished authorand aeronaut, constructed in 1883, with the co-operationof his brother, a navigable balloon 92 ft. long and 30 diameter ( to 1), inflated with 37,439 cub. ft. ofhydrogen
. Aerial navigation . ituting asteam-engine of 8 H. P., representing the weight of 7 men,or say 1,200 lbs., he could obtain a speed of 13^ miles perhour ; but the experiment was not made, and the next indate was THE TISSANDIER ELECTRICAL BALLOON, 1883. Impressed with the belief that recent improvements inelectrical engines afforded a safe and convenient motor forballoons, M. Gaston Tissandier, the distinguished authorand aeronaut, constructed in 1883, with the co-operationof his brother, a navigable balloon 92 ft. long and 30 diameter ( to 1), inflated with 37,439 cub. ft. ofhydrogen, and with a lifting power of 2,728 lbs. The netting in this case was formed of flat ribbonssewed to longitudinal gores, which arrangement was foundmaterially to diminish the air resistance due to the ordi-nary twine netting. The apparatus was driven by a Sie-mens dynamo weighing 99 lbs., actuated by a primary 12 battery (bichromate of potash) weighing 517 lbs. moreand capable of developing i-J H. P. for 2^ hours. The. Fig- 3- screw was ft. in diameter, with two arms, and wasrotated at 180 revolutions per minute. Fig. 3 shows thisapparatus. Two ascensions were made. The first was on October8, 1883. On this occasion there was almost no wind at thesurface, but at a height of 1,600 ft. it was blowing atthe rate of about miles per hour. It was found thatthe apparatus was just able to stem it, exerting the fullpower of the motor. After performing various evolutionsthe aeronauts came down, intending to go up again thenext day ; but the weather being cool, the bichromate so-lution froze during the night, and although the balloon hadapparently lost no gas, it was decided to empty it and totry it again after making some modifications in the rudder,which had not been found to work well. The second ascension took place September 26. 1884,and on this occasion the balloon was found to obey its helmperfectly, to perform various evolutions and to attain aspeed which, although inferio
Size: 2062px × 1211px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookidae, booksubjectaeronautics
