onsdag 28. februar 2018

Flyer One i vindtunnel - Hvor gode var egentlig Wright Bros. i sine kalkyler? - RAS


Research paper published in the Journal of Aeronautical History by John Ackroyd FRAeS on Aerodynamics as the Basis of Aviation: How Well Did It Do?
The paper describes the role of aerodynamics in the enhancement of aeroplane performance. To illustrate this, drag and lift-to-drag data are reviewed, covering the first half-century of powered, controllable flight. The survey begins with the Wright Flyer and the biplanes subsequently developed. This is followed by the monoplane’s ascendancy, the new ideas in aerodynamics here leading to significant drag reduction and increased speed. For this phase, data provided by the Royal Aircraft Establishment, which appear to be not widely known, are discussed in some detail, together with the Establishment’s development of drag assessment methods. The survey then turns to the emerging jet age, ending with the early British swept-wing aircraft, forerunners of the Swift and Hunter. The influence of Reynolds number emerges in the survey but the transonic drag rise due to compressibility is not covered. It is hoped that this survey of aerodynamic drag reduction will be of interest to students new to the subject and also to those wishing to learn more of the development of aeronautical science.
John Ackroyd FRAeS 
·         Aerodynamics

·         Papers
Aerodynamics as the Basis of Aviation - How Well Did It Do.pdf

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