[quote=@Voltus_Ventus]
The technology you are limited to for now is 1930-1940, I changed it in the first post from 1910. And as for materials, go ahead and make what you want, as long as it isn't too OP and you can explain it decent enough. [@Willy Vereb]
[/quote]Ah, sorry for not responding for a while.

Anyways, I thought about creating something like elves for this setting.
They'd be descendants of prehistoric birds so they're fragile but somewhat more speedy.
Their heightened senses and good sense of balace/physics also help them to get ahead with a few inventions.
They'd be also arrogant as hell.