Thread Tools
Old Feb 25, 2013, 05:50 PM
derp express is offline
Find More Posts by derp express
person
derp express's Avatar
Discussion

Mean aerodynamic chord for complex wing shapes


Gents,

I'm trying to figure out the MAC for a wing that's comprised of a straight section in the middle with two swept sections on either side. It's constant chord, so relatively simple. I'm just wondering if there's a way I can take the dimensions of the different wing sections (which are known) and compute the location of the MAC to determine where to put the CG?


Regards,

-DE
Sign up now
to remove ads between posts
Old Feb 25, 2013, 07:40 PM
Brandano is offline
Find More Posts by Brandano
Registered User
You can simply do a weighted average of the MAC for each single panel
Old Feb 25, 2013, 09:10 PM
slebetman is offline
Find More Posts by slebetman
Registered User
slebetman's Avatar
Why don't you use the multi-panel CG calculator:

http://wingcgcalc.bruder.com.br

It's called a flying wing calculator but all it does is find the MAC and draw the CG based on the % you enter. So it's really a generic CG calculator.

Once you've generated your configuration you can ask it to generate a link to your configuration that you can post elsewhere. Here's an example of a wing with straight center section and swept tips:

http://j.mp/ZwoJuf
Old Feb 25, 2013, 09:40 PM
Curtis Suter is online now
Find More Posts by Curtis Suter
Red Merle ALES
Curtis Suter's Avatar
If you have a spreadsheet program Sailplane Calc may be of interest to you. It will do what you ask for a four panel wing. There is also an article I wrote which explains its use.

Go to the Articles/Files page at www.TailwindGliders.com

Curtis
Old Feb 25, 2013, 09:56 PM
kcaldwel is offline
Find More Posts by kcaldwel
Advancing the Schmilblick!
kcaldwel's Avatar
Or you can use Dan's nice CG calculator spreadsheet that can do up to 9 panels on each wing half, and do a good analysis of the tail and fuse contributions as well:

www.rcgroups.com/forums/showthread.php?t=1106300

Kevin
Old Feb 26, 2013, 12:57 AM
derp express is offline
Find More Posts by derp express
person
derp express's Avatar
Sweet, thanks guys!
Old Jan 25, 2015, 03:18 PM
LaBuse is offline
Find More Posts by LaBuse
Registered User

MAC form planform


Hi,

Here is the software that compute the position and length of the mean aerodynamic chord form a b&w picture of the planform of the wing (or airplane).
This is helpful in case of complex shape like elliptic wings.
You will find the executable, a short guide and some sample planforms.

Please, tell me your feeling about this software.

Best regards

Philippe


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
For Sale Northeast aerodynamics bel-air kit minus wing hobbiconexstar Aircraft - Fuel - Airplanes (FS/W) 2 Aug 26, 2016 03:14 PM
Whoops! UFO-PIX... The Quest for the ultimate aerodynamic shape ... gpw Foamies (Scratchbuilt) 135 Apr 05, 2014 05:59 PM
Build Log 2 Metre Constant Chord Thermal Wing guitarcher Nurflügel 6 Mar 14, 2013 08:51 AM
Discussion Aerodynamics of flat plate delta wing kadil Modeling Science 1 Jan 15, 2013 09:44 AM
Aerodynamics & Aileron chord ChrisE Modeling Science 7 Aug 03, 2003 06:51 PM