Some types of rocket engines without any fiction. Liqued fuel engines are the most usual. As for nuclear engines, they were tested in USA and USSR and were ready to be produced. Ion engines are also not a fiction. They are used by long rage probes. The only unreal engine here is the photon engine. In theory it is possible to make it, but there some problems with anti-matterial "fuel".

Look very good to me

Thanks. I'm pleased that you like it.

These are all very cool. What kind is the 4th from the top?

great topic