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Old Oct 24, 2014, 04:01 PM
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John O'Sullivan's Avatar
Nova Scotia Canada
Joined Jan 2004
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Need a good CG and MAC Calculator for multitapered wing

I had a great multi-tapered wing CG and MAC calculator which accommodated a 5 panel tapered wing.
However it was on an older computer and I have lost the link to it.
I have searched the internet but the best I can get is for a 3 panel wing. It does the job reasonably well but my old program worked much better.
Does anyone have a link to that wonderful calculator program?
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Old Oct 24, 2014, 05:08 PM
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rrcdoug's Avatar
Canada, BC, Kelowna
Joined Aug 2010
215 Posts
I guess you could use XFLR5 to do this. It might be cumbersome because it needs airfoil coordinates and must generate polars for each panel foil specfied in your design. It is fussy about older coordinate tables with fewer than 100 chord stations but it has a utility that fixes that. Gives you most any graph you might want about your wing's predicted performance.

http://www.xflr5.com/xflr5.htm

BTW, I have been using rollfuz to make a few tailbooms for a big electric glider. I was able to do a wet seam on one but there are then problems with air getting in the open edge reqired for the seam. The air problem was only cosmetic so the boom was quite usable. Thanks for sharing.
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Old Oct 24, 2014, 07:00 PM
Duane
Wazmo's Avatar
No. VA
Joined Nov 2004
1,473 Posts
Sailplane Calc will do four panels per side.
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Old Oct 24, 2014, 08:04 PM
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Joined Oct 2004
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I use
adamone.rchomepage.com/cg_calc.htm
I believe it will do up to four panels .
Good luck
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Old Oct 24, 2014, 09:48 PM
Mark LSF # 3792
United States, TX, Garland
Joined Nov 2008
700 Posts
Quote:
Originally Posted by Wazmo View Post
Sailplane Calc will do four panels per side.
Used this in the V version...predicted all of the characteristics of a glider I built and had trimmed by trial and error. Is only four panel though. My preferred CG is dead in the middle of the starting CG and neutral point.
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Old Oct 25, 2014, 07:06 AM
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John O'Sullivan's Avatar
Nova Scotia Canada
Joined Jan 2004
1,021 Posts
Thanks Guys.
Not the original program I had, but they work just as well.
rrcDoug, glad you got some use for the RollFuz method.
http://www.windandwavemodels.com/rollfuz.html
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Old Oct 25, 2014, 07:39 AM
stop making sense
hallo's Avatar
Norway
Joined Feb 2014
242 Posts
Here is just some additional files that might be useful to some, thanks.
http://www.tailwindgliders.com/Files.html
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Last edited by hallo; Oct 25, 2014 at 08:22 AM.
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