I designed a flying wing in Google Sketchup which has a TL54 airfoil and a KFm2 airflow in the outer edges of the wings to see if a drooped leading edge in combination with the KFm2 airfoil would prevent the flying wing from tip stalling.
I will also show you how to create PDF plans from Sketchup.
Software used...
Google Sketchup 8
Gimp 2.8
PosteRazor 1.5.2
VirtualBox 4.2
PDFSam 2.2.2