I made the hinges on the tail surface of my Beaver and PC-6 with plywood and brass tube. You can see it a little bit on this pics : https://mraerodesign.securicom.ca/fr...pg&ProduitID=2

They are removable and very strong. You can download the Beaver manual the see how they work exactly and how I install it on the model..
https://mraerodesign.securicom.ca/co...v3%2Djpg%2Epdf

I use 1/8" thick plywood (5 ply aircraft grade) on each side with 1/8" balsa on center to get a thicker hinges assembly.