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Old 06-06-2017, 05:03 AM   #1 (permalink)
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Lightbulb TATRA 77A 0,212......? Is not true

TATRA 77A 0,212......? Is not true not real test....

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T87 T87 model 1:10 = 0.245 T87 1:1.....0,36 CD
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next CZ car Fabia 2000 = 0,33 (0,34), Felicia = 0,34-5 (Combi 0,36), Favorit 1987 = 0.36, Garde = 0,40, 120 = 0,42)
Octavia RS = 0,29 (Octavia Combi = 0,31),Superb = 0,30, Fabia 2012 = 0,30-0,32

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Old 06-06-2017, 09:06 AM   #2 (permalink)
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Could you please post a link to the source of the first chart?

Is this data verified, duplicated or published elsewhere?
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Old 06-06-2017, 11:16 AM   #3 (permalink)
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not impossible.
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Old 06-08-2017, 02:28 AM   #4 (permalink)
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Quote:
Originally Posted by kach22i View Post
Could you please post a link to the source of the first chart?

Is this data verified, duplicated or published elsewhere?
https://en.wikipedia.org/wiki/Automo...g_coefficients
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Old 06-08-2017, 07:21 AM   #5 (permalink)
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The active footnotes seem to be legitimate.


Tatra: The Legacy of Hans Ledwinka
by Ivan Margolius, John G. Henry, Erich Ledwinka (Foreword)
https://www.goodreads.com/book/show/5237522-tatra
Quote:
Possibly the only book on the history of Tatra cars that has been published in English. While at times it may be a bit too dense with technical details for the casual reader, it provides a clear picture of just how innovative the Tatra cars were, and how much they influenced the rest of the automotive world, especially Volkswagen.
Video featuring one of the authors.

Tatra – The Legacy of Hans Ledwinka – Ivan Margolius interview

Quote:
Tatra – The Legacy of Hans Ledwinka is the story of the Tatra company, which originated in the Central European country of Czechoslovakia. It is a tale of great innovation and avant-garde design in automobile engineering. It is also the story of one man – Hans Ledwinka – and his visionary concepts which have become highly influential, although often undervalued, contributions to the development of car technology.
Until now, Hans Ledwinka's talent has hardly been recognised; in retrospect, he can be judged equal to car designers such as Benz, Daimler and Porsche, whose endeavours have been fully recorded many times over. With his revolutionary Tatra cars Ledwinka consistently pushed back the frontiers of automobile construction, and it’s certain that without his inspiration, the Volkswagen in its air-cooled rear-engined form would perhaps never have been conceived. This book suggests that Ledwinka played a greater part in this development than has previously been appreciated.
The authors have covered the full history of the Tatra company, which is one of the oldest factories in continuous automobile manufacture, dating back to the 19th century. By doing this, they have placed both Ledwinka and the Czechoslovak Tatra company in their rightful place in the history of car design, and provided a fully comprehensive assessment of the influence of Tatra car designs and their inspired creator.
The text of this larger format 2nd edition has been fully revised and updated since the 1990 edition. This new edition also contains many additional illustrations. The book also has a new foreword, written by Norman Foster, the British architect, and proud owner of a Tatra T87, who pays tribute to the aesthetic qualities of this design classic and captures the fascination of both designers and motor historians with the development of Tatra.

Ivan Margolius is an author of memoirs and a number of books and articles on art, architecture, engineering, design and automobile history. Born in Prague, Czechoslovakia, where he studied architecture, he moved to London in 1966, where he practised at Foster and Partners, Skidmore, Owings and Merrill, and Yorke Rosenberg Mardall. His interest in Czech politics, history, technology and design spurred on his publishing ventures.
Ivan has been the owner of a 1949 Tatra T600 Tatraplan since 2000.
Even a better video:
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Last edited by kach22i; 06-08-2017 at 07:38 AM..
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Old 06-09-2017, 02:57 PM   #6 (permalink)
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...in retrospect, he can be judged equal to car designers such as Benz, Daimler and Porsche...
Or Josef Ganz, the other progenitor of the Beetle. He was born in Budapest, Hungary.

Quote:
The book also has a new foreword, written by Norman Foster, the British architect...
It's Sir Norman Foster to us plebes.

Edit: couldn't they have used a 1302 or a '67 instead of that 2015 New Beetle? That destroyed the analogy.

Last edited by freebeard; 06-09-2017 at 04:48 PM..
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Old 06-10-2017, 01:49 PM   #7 (permalink)
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Tatra

This is the 87,which registered Cd 0.36 in a modern tunnel (VW).

NOTE: flow is separated in the entire rear fin area!
I think that this is the 77A


They'd be considered a pseudo-Jaray car,with too fast a rear contour.Paul Jaray had no control over what Hans Ledwinka did with his designs,but they have been associated with Jaray and didn't do any good to his reputation.
I don't believe the 77 is as clean as the 87.And the 87 would be equal to today's Dodge RAM 1500.
Here's the 77
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Last edited by aerohead; 06-10-2017 at 01:52 PM.. Reason: add image
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Old 06-11-2017, 08:12 AM   #8 (permalink)
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The FIN is close to the ideal curve, but the main body surface is not close.

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