
Image credit: General Dynamics
Image source: National Archives

Image credit: General Dynamics
Image source: National Archives

Image credit: McDonnell Douglas
Image source: National Archives

Image credit: Lockheed
Image source: National Archives

Image credit: Rockwell International
Image source: National Archives

Image credit: Boeing
Image source: National Archives

Image credit: Grumman
Image source: National Archives

Image credit: Northrop
Image source: National Archives

Electrostatic ion-powered five-man spacecraft passing over Mars’ moon Phobos on the way to Mars. One of two “scout cars” will land on the tiny moon and rendezvous with the ship later.
Mars: Planet for Conquest
by Erik Bergaust
G.P Putnam’s Sons, 1967
Rocketdyne
Image source: Numbers Station