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Originally Posted by aerohead
As Hucho has said ,there's a lot of design latitude going down to Cd 0.25.Below that,one has to begin to respect Frederick Lanchester's shape of the 19th-Century.
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I did the same thing Freebeard did, looked up that name, and even before I saw his posts.
Frederick Lanchester — An untold history of Aeronautics & Aerodynamics
https://medium.com/@anthonyhughes_64...s-d77b582d16f4
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Frederick Who?
Frederick Lanchester (1868–1946)was an English engineer/ inventor. He was, by any definition a polymath — a creative genius also ahead of his time and often struggling to get the ‘establishment’ to catch up or take notice.
Apart from inventing pretty much everything in modern day cars (disc breaks, power steering, 4 wheel drive, suspension systems, worm drive, turbo charging, the first petrol-electric hybrid car etc — oh and we have the terms Top Gear and Dashboard courtesy of Fred) he also worked on pioneering inventions in colour photography, the first outboard motor boat, electric sound amplification and powered flight for which he publishing the theories of Aerodoneticsand Aerodynamics that would inform the basic principles of these areas of research, development and industry we know today. Indeed just one glance at his design for the powered flight aircraft with contra-rotating propellers in 1897! compared to the other designs for airplanes, will demomstrate the true nature of his vision and just how ahead of his times he really was (More of that later)
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And along the way discovered this amazing NASA PDF too.
https://www.google.com/url?sa=i&url=...AAAAAdAAAAABAG