This is for the persons who want to make a flying RC model and are already a bit deeper into the knowledge of flying wings. But ...if you are a starter, feel free to try it too.
Marko Stamenovic made a Excell file which is a true help if you want to design your own flying wing using swept wings without winglets.
He says: "Guys, I am preparing excel tool for designing Horten style flying wings. It starts with defining planform, then calculates neutral point and CG for desired SM. Then you enter coordinates, Cm and zero lift angle for root and tip airfoils, it interpolates all airfoil sections between, calculates needed twist using LLT (you can also input twist data from other software, LLT is limited to only small sweep angles) and calculates trimmed Cl with chosen SM. It gives you bunch of data: geometry, Re numbers for min, cruise and max speed(guesstimated)... At the end you get coordinates for all airfoil sections. You can also choose chord point around which twist is done. You can copy airfoil coordinates to dat/txt files and import that in CAD software. Then you just loft profiles and you have one side of the wing done without all the hassle of doing complex twist in CAD. I am finsihing it and trying to make it as simple as possible to use."
Elliptic and Bell Shaped Lift Distribution (BSLD)
He mentioned me it can be used for elliptical lift distribution, buuuut ...also for the bell shaped lift distribution or BSLD that is so know in the Horten designs.
In a loft you can see all the ribs together. You can see the curve of the wing. Ain't it beautiful?
In the same figure (at the bottom) you see how the twist is set for each location. If you see a curve, you have non-linear twist. Is it a line, you have linear twist.
DOWNLOAD ALSO THIS ONE
Marko Stamenovic: "Here is new small excel tool. This one can be used to create airfoils in the same way Horten brother did. You can choose thickness and chamber and then you get coordinates that you can paste into dat file and open with XFoil or XFLR5. (remember to change commas to dots first) Airfoil created with it should have zero Cm0. Thanks Norman Masters for sharing the link from HBA forum."