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Old 07-17-2010 | 06:09 AM
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Lnewqban's Avatar
Lnewqban
 
Joined: Apr 2007
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From: South Florida
Default RE: Finding CG

You are very welcome, skater_719

Yes, I draw it using AutoCAD.
As you asked, I wanted to show you the process and formula, so you could use them for future projects.

It is not that difficult.
1) Divide the wing shape in simpler shapes.
2) Find the centroid of each shape, over which the MAC runs.
3) Divide each MAC length into four equal parts.
4) Select the 25% closer to the LE for each shape, that is the neutral point (NP) of each shape.
5) Calculate a mean location for the total wing NP from any reference point by computing individual NP locations and areas.
6) Calculate the total wing MAC length.
7) Select the 25% closer to the LE for that total wing MAC, that is the neutral point (NP) of your delta wing.
8) Balance it so the CG is located ahead of that NP.
9) Go flying!

The attached PDF can be read more clearly.
You can download it into your computer by right clicking on the icon / Save target as

Best luck with your project!