David S. F. Portreeさんのイラストまとめ

For a time in 1971-1972, NASA became obligated to consider replacing Kennedy Space Center as the main Shuttle launch and landing site. Forty of the 50 states proposed some 150 sites before sanity prevailed. https://t.co/hnhQzus7a8

Reentry from an interplanetary Earth flyby trajectory is a big challenge. In 1966, as part of planning for 1970s piloted Mars/Venus flyby missions, NASA contractor Bellcomm proposed interplanetary reentry heat shield tests during advanced Apollo missions. https://t.co/nqbUyCN1pS

From the start NASA knew the Shuttle heat shield was an engineering challenge. A 1972-1973 study looked at an interim ablative shield designed to buy engineers more time to develop a robust system. Neither interim system nor robust shield was funded. https://t.co/IyAu4TRrjX

Space Shuttle was technological leap greater than Apollo, yet the Nixon White House and successive Congresses insisted it be built to a tight budget. The result was a fragile system that killed 14 astronauts. A NASA Marshall engineer sought to improve it. https://t.co/bkoRy8m1rw

SEI Swansong: International Lunar Resources Exploration Concept (1993) (aka "Why Build an International Space Station when we can build an International Lunar Outpost?") https://t.co/3Gzr0jY0Ln No Shortage of Dreams @hssonline @SocHistTech @QuestQuarterly @NASAhistory

As Gemini Was to an Apollo Lunar Landing by 1970, So Apollo Would Be to a Lunar Base by 1980 — https://t.co/ZkCQQqVVEw No Shortage of Dreams. #histSTM #spacehistory #SpaceTwitter

I've always liked this post - and this mission. https://t.co/HbnK9Tcw7b

No Shortage of Dreams is my blog. I tell the story of spaceflight through missions & programs that didn't happen. In other words, it's spaceflight advance planning placed in its historical context. https://t.co/LVBU2gXZsU

New blog post - all about Star-Raker, Rockwell's mighty single-stage-to-orbit space plane. I wrote about the 1978 version, which Rockwell proposed as the launch vehicle for Solar Power Satellites. https://t.co/LtxXDUW542 No Shortage of Dreams

Star-Raker, a Space Shuttle candidate concept in 1968, was revived for the NASA/Dept of Energy Solar Power Satellite studies in the late 1970s. Rockwell hoped it could fly between conventional airports. https://t.co/LtxXDUW542 No Shortage of Dreams