Check this out... the old man has pulled this out from his garage. It's an old 10 speed Raleigh Winner from my childhood. Well, from mid-teens - it's 21" frame IIRC. It came with drops but I liked the flat bars more, even back then. Looks like he's been playing with the geometry though, I don't recall it being that way!

There's a dyno that fits under the bottom bracket and runs against the flat of the tyre, rather than one that runs on the edge of the tyre like most do. Powers a front halogen headlight. This was all pretty hi-tech back then