Talk:Chord (aeronautics)

message: The "center of curvature" definition does not agree with all the formulas on the rest of the page (because the "wing area" is not measured to include parts of the under surface of the wing!).  I added "Dubious" to the main page until an expert can properly sort this out.  See also my comment above. 120.151.160.158 (talk) 13:07, 7 January 2013 (UTC)
replies: text: I just tried to clarify the disagreement. I wholeheartedly agree that the definition I wrote and illustrated is incompatible with many existing drawings in printed books and in Wikimedia Commons — but it’s the only one for which I have a quote. Please, please give me a reference for the alternative definition and I will illustrate the difference just as I did for the differing definitions of "thickness". Thanks. Ariadacapo (talk) 17:45, 7 January 2013 (UTC)
thread_title: Dubious definition

message: The formula for MAC is listed as:
\mbox{MAC} = \frac{2}{S}\int_{0}^{\frac{b}{2}}c^2(y) dy
This formula is rather unusual, and unnecessarily so, as it expresses the square of a function c(y) as c^2(y).  This could easily be re-expressed as:
\mbox{MAC} = \frac{2}{S}\int_{0}^{\frac{b}{2}}[c(y)]^2 dy
with increased clarity (especially for someone unfamiliar with the subject matter).  While I can't vouch for the formula itself, I can vouch for the fact that this would make it more accessible.  As the idiom in the formula isn't introduced to the reader, I believe this is the correct approach (assuming the formula is valid).  70.250.198.35 (talk) 06:48, 6 September 2010 (UTC)
replies: text: Thanks for spotting that.  I have rationalised the formula and added in-line citation of Abbott and Von Doenhoff's Theory of Wing Sections.Dolphin (t) 07:45, 6 September 2010 (UTC)
replies: text: Hey, that's cool, that will help, but that's not what I was getting at.  My point was that c^2(y) is more clear as [c(y)]^2.  70.250.198.35 (talk) 10:10, 6 September 2010 (UTC)
replies: text: I agree that [c(y)]^2 is clearer than c^2(y).  However, the cited source uses c^2.  Also I have a personal preference to use () brackets to indicate multiplication rather than clarifying that c is a function of y.  Throughout Wikipedia brackets () are used in equations to indicate multiplication rather than showing a functional relationship. Dolphin (t) 03:37, 7 September 2010 (UTC)
thread_title: Idiomatic formula

message: The very interesting discussion above lead me to draw :Image:Chord length definition (en).svg. It displays a turbine blade airfoil so that the distinction between "max length of airfoil" and "chord length" can be made visually.
My hope is to replace the rather mis-leading top-page illustration (:Image:Airfoil.svg), please let me know if you’d rather not see it replaced. Ariadacapo (talk) 08:35, 27 November 2011 (UTC)
replies: text: Done, please ping me if inappropriate Ariadacapo (talk) 09:02, 4 December 2011 (UTC)
thread_title:  Suggestion for better illustration 

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thread_title:  External links modified (January 2018) 

message: A discussion is taking place to address the redirect :Taper ratio. The discussion will occur at Wikipedia:Redirects for discussion/Log/2021 April 2#Taper ratio until a consensus is reached, and readers of this page are welcome to contribute to the discussion.  –LaundryPizza03 (dc̄) 16:23, 2 April 2021 (UTC)
thread_title:  "Taper ratio" listed at [[Wikipedia:Redirects for discussion|Redirects for discussion]] 

message: The article states that in addition to finding the MAC, it is important to know its location. But this is never explained. How does one find the position (x and y) of the MAC, with respect to the (for instance) the root leading edge of the wing?  Hermanoere (talk) 22:55, 2 December 2021 (UTC)
thread_title:  Location of MAC