Image credit: North American Rockwell
Image source: Numbers Station
Category: Phase B
Deploying a Space Tug
Assembly & Launch
Artist’s Rendering
S70-26310
Just to illustrate just how utterly massive the R-134B would have been, take a look at this illustration from a report written by Jack Swigert for The Society of Experimental Test Pilots:
Shuttle Program at Astronautix
Image credit: NASA
Image source(s):
NAR Concept Art
MDAC Orbiter
532 Flyback Booster
Shuttle Program at Astronautix
Grumman & Boeing Phase B at PM View
Image credit: Grumman
Image source: NASA NTRS
MDAC Canard Booster
Shuttle Program at Astronautix
MDAC Phase B Shuttle at PM View
Imaged credit: NASA
Image source: NASA NTRS
NAR Booster Concept
Shuttle Program at Astronautix
Image credit: North American Rockwell
Image source: Numbers Station
518 Flyback Booster
Shuttle Program at Astronautix
Grumman & Boeing Phase B at PM View
Image credit: Grumman
Image source: NASA NTRS
