I'm looking at Cd / Alpha for the SD7062 Profile:


Wondering if it includes both induced and parasite drag. How does one tell?


To answer the question you have to look at the source:

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Induced drag is a drag type which appears on wings with finite span. The polars given are for a 2D profile section and therefore without induced drag.

What about the parasitic drag? Using Wikipedia's definition only skin friction and form drag are taken into account. Interference drag, which is a 3D drag type dependent on the position of other bodies, can't be included either.

  • $\begingroup$ That makes absolute sense! Thank you! My next questions was how to calculate drag taking aspect ratio into account, which the typical drag formula doesn't take into account. $\endgroup$ – sparkyspider Jan 28 '17 at 8:53
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    $\begingroup$ In grc.nasa.gov/WWW/K-12/airplane/induced.html there is a formula for the induced drag. If it doesn't answer your question post a new one explaining what do you want to know. $\endgroup$ – Gypaets Jan 28 '17 at 18:43
  • $\begingroup$ Thank you for setting me on the right track @mns. My more detailed question is now here: aviation.stackexchange.com/questions/35176/… $\endgroup$ – sparkyspider Feb 2 '17 at 7:00

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