My brother asked me to make some stencils for drawing airfoils for his ATPL both in his book and on the whiteboard so here it is. Very simple design that has two sizes per stencil. Small airfoil length is 100mm inside and 200mm outside, Medium is 200mm/300mm and the large is 400mm/500mm.

The large one is split with pins in the .3mf file so it fits on the bed and is a friction fit so it can be put away half its length. Can be glued but doesn't need to be. Holes will fit a 6mm diameter magnet with some force required but doesn't need any glue either.

The two larger ones have holes for 6mm magnets and it is 2.7mm thick as that is the thickness of the magnets I had lying around. If you want the holes a different diameter or a different size I am happy to upload different files. Don't know if many people will want this but he did so figured I would upload it just incase.