From Retro Rockets Number One:
Welcome to the first installment of Retro Rockets, a series detailing pulp-SF rocket ships for your d20 campaigns.
Science fiction pulps were heavy on the "fiction" and light on the "science." Man’s first ventures into orbit and beyond were still decades away, and many of the things that we now know about space travel were merely theories at the time. The writers of the pulps concentrated on bringing readers fast-paced adventure tales, liberally seasoned with things that sounded vaguely scientific, to give the stories a futuristic sheen. To today’s audience, phrases like "atomic ray pistol" "electro suits" and "radio rangers" sound absurd, but to the pulp reader of the time, they were full of wonder and possibility.