Retro science fiction

This site ( http://davidszondy.com/future/futurepast.htm ), called Tales of Future Past, is about what the previous generations thought there would be in the future, such as the 30's ideas of a flying car. Maybe it could help as inspiration for retrofuturistic ideas relating to the "nazitech"

For example, many ideas for astronauts' suits before actual space flight included a "projectile gun", to provide motion for the user on the zero-gravity environement. If Angela's idea of a prototype suit for testing on Antartica is used, there could be such a device, also used as a weapon, perhaps using liquid nitrogen or something similar.
http://davidszondy.com/future/space/spacesuit8.htm