This topic is a development of the 'Lighter than Air' topic and is covered in the 'Flight' unit by eight and nine year olds. It tells you how airships developed because balloons could not be steered, but simply floated where the wind took them. You learn that Henry Giffard, in 1852, made a cigar-shaped balloon and powered it with a steam engine to make it steerable. Later, petrol engines were used with rigid-framed envelopes.These were the very first large aircraft, and they carried people across the Atlantic. A series of disasters caused by the inflammable hydrogen, including the Hindenburg disaster, meant the end for airships.
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