Image credit: USAF
Image source: Bell Aircraft Museum
Tag: spaceplane
Northrop N-205 Space Trainer
Gjertson Booster Concepts
Shuttle Program at Astronautix
Image credit: Convair
Image source: SDASM Archives
Martin X-24
MDAC “Drawbridge”
Shuttle H-33
Drawbridge Orbiter
MSC/NAR Concept-A
NAR A at Astronautix
Image credit: North American Rockwell
Image source: KSSU The Blog
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