Jet & Rocket Plane ideas of 1930 (Hypothetically)

[hesham]

Hi,

https://books.google.com.eg/books?id=kmgNhM7jty0C&pg=PA35&dq=rocket-plane+magazine&hl=ar&sa=X&ved=0ahUKEwifktXl9fnKAhVEXhoKHQdPDsIQ6AEIPjAG#v=onepage&q=rocket-plane%20magazine&f=false

 

[Avimimus]

These drawings suggest a kind of high pressure closed fan driven by a piston engine - not a rocket or jet engine (at least not in the modern sense of the word).