The filler neck on original PA11 and PA16 tanks were not in the middle like the later PA18, 20 and 22.
Does a PA-18 front seat bolt in to an -11?
I remember bolting one right onto a PA11. Don't expect to have a seat built at Javron and bring it to me for an annual on a certified PA11. Glenn can sign it off
I don't blame you. But 99% of IAs wouldn't have a clue
Glenn
Not in mine? Was built in April of 47, maybe later ones. We took a Smith cub seat and had to build new legs
Glenn
It's unfortunate that some enterprising DER or equivalent hasn't analyzed the PA-11 and designed a 100# GW upgrade. More robust gear hardware, wing or strut mods, and fuselage ads as required.
Gary