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OverviewPlease note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Semi-rigid airships are airships with a partial framework. These often consist of a rigid, or occasionally, flexible, keel frame along the long axis under the aerodynamic hull envelope. The partial framework can also be located inside the hull. Semi-rigids were built in quantity from the late 19th century but since the 1930s they fell out of favour until the development of the Zeppelin NT. More or less integrally attached to the hull are the gondola, engines and sometimes the empennage (tail). The framework has the task of distributing the suspension loads of these attachments and the lifting gas loads evenly throughout the whole hull's surface and may also partially relieve stresses on the hull during manoeuvres. In early airships which relied on nets, fabric bands, or complicated systems of rope rigging to unite the lifting envelope with the other parts of the ship, semi-rigid construction was able to achieve improvements in weight, aerodynamic, and structural performance. The boundary between semi-rigid and non-rigid airships is vague. Especially with small types, it is unclear whether the structure is merely an extended gondola or a proper structural keel. Full Product DetailsAuthor: Soren Jehoiakim EthanPublisher: Crypt Publishing Imprint: Crypt Publishing Dimensions: Width: 15.20cm , Height: 0.50cm , Length: 22.90cm Weight: 0.142kg ISBN: 9786138753582ISBN 10: 6138753585 Pages: 88 Publication Date: 06 December 2011 Audience: General/trade , General Format: Paperback Publisher's Status: Unknown Availability: Not yet available This item is yet to be released. You can pre-order this item and we will dispatch it to you upon its release. Table of ContentsReviewsAuthor InformationTab Content 6Author Website:Countries AvailableAll regions |