Originally Posted by LuvEvolution7
yes, you can't exactly use the X method with LEX extensions. your numbers will be slightly off. you have to treat the LEX as a seperate delta wing. essentially, you have to CG based on two wing panels, which significantly affects the position of the CG. I can do it using the X method too, but gets a little bit more complicated.
For multi panel wings you can use the online multi panel flying wing CG calculator:
It merely finds the MAC and draws the CG based on the %MAC you define so contrary to its name it's really a general purpose CG calculator - nothing special about flying wings except the 15% MAC suggested CG.
For multi panel wings it finds the MAC of the individual panels and averages them somehow.
The cool thing about the calculator is that it can create a link to your calculations so you can post it here for reference. It can even export the drawing as a PNG file.
Here's an example of a CG calculation for a slightly more complicated delta: