We also had the mustard space plane, back in the 60’s. The idea/sketch is one thing but the actual engineering and funding is something else. https://en.m.wik

We also had the mustard space plane, back in the 60’s. The idea/sketch is one thing but the actual engineering and funding is something else. https://en.m.wikipedia.org/wiki/BAC_Mustard https://en.m.wikipedia.org/wiki/BAC_Mustard