OT Tom Swift - The name of another boy-adventure novel series?

Greetings; You know, while you folks happen to be on the subject of this - I was wondering if anyone could help me out with something I've been pondering on for a couple of years now. When I was a kid I used to read a series of boy adventure books that I simply cannot recall the name of. The books were older than I was (When I say "A kid", I'm talking the 80s) I'm sure of it, but I'm not sure by how much. There were three boys, I believe. The head kid was called something like "Hercules", either as a first name or a nickname. He was a "chubby" kid, and when he was a toddler was in a series of TV adverts, or perhaps a programme, which is recurringly mentioned in the books. Their clubhouse was in a junk yard one of their fathers owned, where they built things to help them go through their adventures. I remember they had a printing press they repaired from the junk in the yard. I think the clubhouse was an old trailer home, or perhaps a caravan? This has been one of those things that has been on the tip of my brain for a long time and I just can't remember what in the heck the books names were. Please, can anyone alleviate this brain rot of mine? Thanks all! JP