3 ms·
Or turbojet trains[1] [1] https://en.wikipedia.org/wiki/Turbojet_train https://en.wikipedia.org/wiki/Turbojet_train
by TremendousJudge 9y ago
Or turbojet trains[1]
[1] https://en.wikipedia.org/wiki/Turbojet_train https://en.wikipedia.org/wiki/Turbojet_train
- pavel_lishin 9y agoOr Ekranoplans[2] [2] https://en.wikipedia.org/wiki/Ekranoplan https://en.wikipedia.org/wiki/Ekranoplan
- mrguyorama 9y agoor flying cars, or jetpacks, or a million other ideas that just had "engineering problems" that were supposed to revolutionize transportation.