[quote=@Jotunn Draugr]
[@duck55223] care to give your verdict on martians and jet engines? Just to settle it. It's your lore, and more clarity is always good.
[/quote]He's busy with family matters right now.
Although I can tell you he really didn't like my Martian idea back then. I don't know if he did reconsider this so I kinda took my chances with it.

As for jet engines, they are pretty much the only way you can get aircraft with steam working. Just by using steam turbines rather than gas turbines. The other alternative is internal combustion engines which of course don't exist here with blue coal so practical for steam. Describing my aircrafts to have jet engines is a bit misleading since it would draw the connotation I may try recreating late WW2 era jet aircraft. I don't.