In the early '70s I think this was sold as a non-flying scale model. I barely remember it - a friend's older brother had one, it definitely didn't include engines or a control system. I think it was marketed as a giant scale model, 1/24 scale or so. I do remember the props looked like they would work just fine on an .049 engine.
I had real nice static version one when I was a kid, mid seventies-ish. It was an "H" model, the short solid nose with the cannon. I think my dad brought it home from a gun show or something and gave it to me. Whoever had assembled it painted it in a flat dark olive drab (accurate) and did an excellent job. They did the frames on all the glass sections as well. There was no insignia or markings on it though. I just thought it was super cool and was a very prized possession until it disappeared at some point, no recollection where to. I remember setting it on the floor in front of a window fan then laying on my belly just staring at it with the props spinning away. I'd mess around with the "throttles" setting the fan to low, medium, high etc., and just imagine being in control of the various operations in a real one, dreaming...
On occasion I'll check Ebay for a replacement kit but yeah, they're few and far between and nice ones go for BIG money, more than I can swing for one. I'd sure like to have one though.
Not sure, but I've always felt like the flying version was exactly the same, like it came out of the same originally designed molds but with minor mold adaptations for the C/L requirements. Or, vice-versa, depending on which version came first? I'm sure somewhere out there is an Aurora historian who knows.