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Feb 01, 2013, 10:42 PM
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Joined Feb 2013
4 Posts
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How to determine the coefficient of drag/lift?
Hey guys im new to the forum, however i have been studying rc jets and they operate for the last 2 years. My question is How is the coefficient of drag/lift found without practical assessment, I.e. wind tunnel experiments etc.
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Feb 02, 2013, 01:05 PM
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Denver, CO
Joined Dec 2005
5,686 Posts
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Lots of math, or a few estimations based on previous experience. Hard to get it exact without actual in flight measurements, or computer simulation.
students.sae.org/competitions/aerodesign/rules/aero_nicolai.doc |
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Feb 07, 2013, 09:38 PM
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St.Catharines, Ontario
Joined Jan 2009
10,333 Posts
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there are programs that will do it for you, if you know some of the parameters. there's a new one on the EDF forum by a member that seems to be very good. I haven't spent much time figuring it out, but it looks easy to use.
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Feb 14, 2013, 10:56 AM
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Joined Feb 2013
4 Posts
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Alright thanks guys.
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Feb 16, 2013, 09:42 PM
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United States, OH, Troy
Joined Oct 2010
745 Posts
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I use Solidworks. It does a great job IF you remember to use the correct Reynold's number.
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