The Enigma of the Aerofoil

The Enigma of the Aerofoil PDF Author: David Bloor
Publisher: University of Chicago Press
ISBN: 0226060934
Category : History
Languages : en
Pages : 562

Book Description
Why do aircraft fly? How do their wings support them? In the early years of aviation, there was an intense dispute between British and German experts over the question of why and how an aircraft wing provides lift. The British, under the leadership of the great Cambridge mathematical physicist Lord Rayleigh, produced highly elaborate investigations of the nature of discontinuous flow, while the Germans, following Ludwig Prandtl in Göttingen, relied on the tradition called “technical mechanics” to explain the flow of air around a wing. Much of the basis of modern aerodynamics emerged from this remarkable episode, yet it has never been subject to a detailed historical and sociological analysis. In The Enigma of the Aerofoil, David Bloor probes a neglected aspect of this important period in the history of aviation. Bloor draws upon papers by the participants—their restricted technical reports, meeting minutes, and personal correspondence, much of which has never before been published—and reveals the impact that the divergent mathematical traditions of Cambridge and Göttingen had on this great debate. Bloor also addresses why the British, even after discovering the failings of their own theory, remained resistant to the German circulation theory for more than a decade. The result is essential reading for anyone studying the history, philosophy, or sociology of science or technology—and for all those intrigued by flight.

Air-Screws

Air-Screws PDF Author: M a S Riach
Publisher: Palala Press
ISBN: 9781347268827
Category :
Languages : en
Pages : 148

Book Description
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Why Is There Philosophy of Mathematics At All?

Why Is There Philosophy of Mathematics At All? PDF Author: Ian Hacking
Publisher: Cambridge University Press
ISBN: 1107729823
Category : Science
Languages : en
Pages : 307

Book Description
This truly philosophical book takes us back to fundamentals - the sheer experience of proof, and the enigmatic relation of mathematics to nature. It asks unexpected questions, such as 'what makes mathematics mathematics?', 'where did proof come from and how did it evolve?', and 'how did the distinction between pure and applied mathematics come into being?' In a wide-ranging discussion that is both immersed in the past and unusually attuned to the competing philosophical ideas of contemporary mathematicians, it shows that proof and other forms of mathematical exploration continue to be living, evolving practices - responsive to new technologies, yet embedded in permanent (and astonishing) facts about human beings. It distinguishes several distinct types of application of mathematics, and shows how each leads to a different philosophical conundrum. Here is a remarkable body of new philosophical thinking about proofs, applications, and other mathematical activities.

Into Oblivion

Into Oblivion PDF Author: Macarthur Job
Publisher:
ISBN: 9780980468694
Category : Aeronautics
Languages : en
Pages : 145

Book Description
On 21 March 1931, the airliner Southern Cloud vanished while en route from Sydney to Melbourne, and the nation held its breath as an exhaustive search was conducted throughout south eastern Australia. No trace was found of the missing aircraft or its eight occupants, and the mystery of Australia's first aviation tragedy became folklore.The enigma was finally resolved 27 years later, when a Snowy Mountains Hydro Scheme worker stumbled across the skeletal remains of the aircraft in the rugged Toolong Range in southern New South Wales.But do we really know what happened to the Southern Cloud?Did anyone survive the crash? Why was a crucial piece of evidence suppressed from the official report? So many years afterwards, the riddle of Australia's first major airline disaster still poses more questions than it answers.

Separated and Vortical Flow in Aircraft Wing Aerodynamics

Separated and Vortical Flow in Aircraft Wing Aerodynamics PDF Author: Ernst Heinrich Hirschel
Publisher: Springer Nature
ISBN: 366261328X
Category : Technology & Engineering
Languages : en
Pages : 458

Book Description
Fluid mechanical aspects of separated and vortical flow in aircraft wing aerodynamics are treated. The focus is on two wing classes: (1) large aspect-ratio wings and (2) small aspect-ratio delta-type wings. Aerodynamic design issues in general are not dealt with. Discrete numerical simulation methods play a progressively larger role in aircraft design and development. Accordingly, in the introduction to the book the different mathematical models are considered, which underlie the aerodynamic computation methods (panel methods, RANS and scale-resolving methods). Special methods are the Euler methods, which as rather inexpensive methods embrace compressibility effects and also permit to describe lifting-wing flow. The concept of the kinematically active and inactive vorticity content of shear layers gives insight into many flow phenomena, but also, with the second break of symmetry---the first one is due to the Kutta condition---an explanation of lifting-wing flow fields. The prerequisite is an extended definition of separation: “flow-off separation” at sharp trailing edges of class (1) wings and at sharp leading edges of class (2) wings. The vorticity-content concept, with a compatibility condition for flow-off separation at sharp edges, permits to understand the properties of the evolving trailing vortex layer and the resulting pair of trailing vortices of class (1) wings. The concept also shows that Euler methods at sharp delta or strake leading edges of class (2) wings can give reliable results. Three main topics are treated: 1) Basic Principles are considered first: boundary-layer flow, vortex theory, the vorticity content of shear layers, Euler solutions for lifting wings, the Kutta condition in reality and the topology of skin-friction and velocity fields. 2) Unit Problems treat isolated flow phenomena of the two wing classes. Capabilities of panel and Euler methods are investigated. One Unit Problem is the flow past the wing of the NASA Common Research Model. Other Unit Problems concern the lee-side vortex system appearing at the Vortex-Flow Experiment 1 and 2 sharp- and blunt-edged delta configurations, at a delta wing with partly round leading edges, and also at the Blunt Delta Wing at hypersonic speed. 3) Selected Flow Problems of the two wing classes. In short sections practical design problems are discussed. The treatment of flow past fuselages, although desirable, was not possible in the frame of this book.

German Fighter Aircraft in World War I

German Fighter Aircraft in World War I PDF Author: Mark C. Wilkins
Publisher: Casemate
ISBN: 1612006205
Category : History
Languages : en
Pages : 194

Book Description
This fully illustrated volume explores German military aviation during WWI through archival photographs and authentically detailed replicas. Fighter aircraft were developed during World War I at an unprecedented rate, as nascent air forces sought to achieve and maintain air supremacy. German manufacturers innovated at top speed, while constantly scrutinizing the development of new enemy aircraft. The Germans also utilized the concept of modular engineering, which allowed them to disassembled or reassembled their aircraft quickly in the field. The pinnacle of their aeronautical innovations was the iconic Fokker D VII—the only aircraft specifically mentioned in the Treaty of Versailles, which forbade Germany from building it after the war. German Fighter Aircraft in World War I explores how German fighter aircraft were developed during the war, the advancements and trials that made the Fokker D VII possible, and the different makes and types of aircraft. Using unpublished images including photographs of surviving aircraft, archive images, and models and replicas, this volume shows details of aircraft that were kept top secret during the war. Extensively illustrated with 140 photos and ten color profiles, this is will be essential reading for all WWI aviation enthusiasts and modelers.
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