x planes

from “Nuclear-powered aircraft” (“Применение атомных двигателей в авиации”), published in 1957, by G. Nesterenko, A. Sobolev, and Yu. Sushkov.

Fig. 60: Heavy helicopter with nuclear engine
Fig. 68: Nuclear carrier capable of launching orbital satellites.
.
(Kindly submitted by Mr Alexey Mahotkin - immense thanks.)