Well, they are now after a major redesign of the aft section of the fuselage. The fuselage had been through a structural analysis for the 12G design...
One source to look at is Mcmaster All sorts of wall thicknesses, diameters and material. I like to plan on a 1/16 minimum wall bush so call it about...
Started both flying and working on planes in 1970 doing weld repairs to the rusty tubes on a PA17 in trade for lessons. Official first solo in '72 with 7hrs in the book. Collage for me was at Embry Riddle. I have road raced motorcycles, raced cars which for the past 25 years I build road race cars for my living. I have spent years restoring planes as well as having built 6 planes with much of my own design work in them. I am currently building a J4 look-alike, a clean sheet design. This is my 7th plane and fully my own design.
Interests:
To damn many, but I spend my time designing and building anything that can move.
Signature
Regards, Charlie
Super Coupe E-AB build in process