If you have MS Excel capable spreadsheet please try downloading "Flying Wing Calc". It'll do all this and much more, very easily. All you need is a ruler in either inches or millimeters and a scale in ounces or grams if you wish to know wing loading.
There are no complex lines to be drawn, no figuring sweep angles, no finding the quarter chord location etc. It's very simple to use.
Please see
www.TailwindGliders.com and go to the Articles/Files page.
Curtis Suter
Montana