I am looking for photos and schematics of Leonid Dushkin's rocket engines:
RDA-1-150
RDA-300
RDA-600
D-1-A-1100
and also these engines by Glushko:
RD-1
RD-2
ED-140
Why? There is a clear evolution of engine designs, which I would like to illustrate in my book:
I. Development of steady-state regenerative cooling
ORM-50 (by Glushko)
ORM-65
ORM-70
RD-1
RD-2
II. Development of larger, cylindrical engines with injector head
RDA-150 (by Dushkin, after arrest of Glushko)
RDA-300
D-1-A-1100
III. Development of flat injector head, mixing/swirling injectors
RD-1 (by Isaev)
RD-1M
U-1250
IV. Development of larger, high-chamber pressure engines
KS-50 (Glushko again)
ED-140
RD-107