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April 28, 2010, 11:23 |
moment coefficient
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#1 |
Member
tom
Join Date: Feb 2010
Posts: 46
Rep Power: 16 |
Hi, all
I am doing an aerofoil simulation now, why the moment coefficient is always positive? the experimental data that I have is negative. Does anybody have the same problem with me? Han |
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April 29, 2010, 10:42 |
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#2 |
Senior Member
Chris
Join Date: Jul 2009
Location: Ohio, USA
Posts: 169
Rep Power: 16 |
I think it depends on your coordinate system. From the pilot's perspective, a nose-up pitching moment is positive, but in a right-handed coordinate system, it's negative.
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