Airships past and present, together with chapters on the use of balloons in connection with meteorology, photography and the carrier pigeon (1908)
Hildebrandt, A. (Alfred), b. 1870, Story, W. H. tr · New York, D. Van Nostrand company · leaf 119
be capable of being.§ hoisted or lowered,| the result being to| shift the position of 5 the centre of gravitytu and consequently ton alter the direction 6 of motion. The^ machine weighed 3J tons, and for thepurposes of the trialruns it was mountedon four wheels andput on a railwaytrack. An… … FLYING MACHINES. 99 the upper one. During a later test, the overhead rail wasbroken by the force of the impact. The machine flew awayacross the field, and was partially destroyed. A dynamometershowed that a dead weight of 4J tons would have been lifted, andas a result of these tests it is safe to…
Aeronautics
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