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Old Feb 05, 2013, 02:32 AM
Lapsus calami
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Question
airfoil nomenclature

This is a request for information about terms used to describe the different surface areas of an airfoil cross-section.

For example, entry was one of the terms (if I recall correctly).

My copy of Airfoil Sections (A completely revised version of J. W. B. Cruickshank's original volume) by R. H. Warring (1946) is no help at all.

Can anyone please help before I go completely spare? I have them filed away somewhere, but both the terms and their location have fallen out of my brain - I'm open minded you see?
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Old Feb 05, 2013, 06:05 AM
Launchpad McQuack
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Maybe this link is helpful:

http://www.desktop.aero/appliedaero/...e/welcome.html

Especially chapter 5.2: http://www.desktop.aero/appliedaero/...lgeometry.html
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Last edited by Prop-er; Feb 05, 2013 at 08:02 AM.
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Old Feb 05, 2013, 07:15 AM
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Prop-er:

Fantastic! Thanks for posting that!

Yours, Greg
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Old Feb 13, 2013, 01:41 AM
Lapsus calami
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Thanks Prop-er; very interesting and informative site.

As I delved into this, I discovered I was after something quite specific - the term Phillip's Entry. It refers to the section of wing surface between the entry point and low point.

Turns out a breadcrumb trail begins in Dave Thornburg's Old Buzzard's Soaring Book - there's a sketch on the introductory page to Section Two: Design.

The terminology is an artefact of aviation pioneer Horatio F. Phillips (1845-1926), who's work on sustainers (airfoils) in the 1880s "began the systematic evaluation of curved surfaces meant for aerial machines".

Seems my 1940s airfoil book wasn't old enough after all!
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Old Feb 13, 2013, 01:48 AM
Lapsus calami
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Of course, as the gentleman's name was Phillips, his entry should be labeled Phillips' Entry (as per Old Buzzard's), though an editor colleague would likely insist on Phillips's Entry.
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Old Feb 13, 2013, 02:15 AM
Launchpad McQuack
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More about Phillips to be found here:
http://archive.is/npee
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