I have flown with an aluminum tank in my KR-2. I needed a bigger tank so I made one using composite materials. There was always a smell of fuel inside the plane with the metal tank but not with my epoxy lined carbon fiber gas tank. My neighbor with his Aeronca had that problem so he laid up glass around his metal tank to solve the 'gas fume' problem. As far as the best type of welding, I've found that oxy acetylene is the cheapest. Not the best for aluminum welding though. Use TIG for that.
Joe Scappoose, Ore.
