| Barry
I believe the method of wing construction using a full depth laminated spar and foam was originally developed for high aspect ratio, thin aerofoil section gliders, the original foam / veneer wings just weren’t up to the job. I adapted their method by missing off the veneer, adding “false” ribs and covering with Solatex, as you say indistinguishable from the “real thing” and certainly a lot quicker to build. All this was of course when carbon fibre was still prohibitively priced.
Unfortunately it wasn’t a viable construction method for the Elf with folding wings and associated locks etc.
Grahame |