Elon Musk
@elonmusk · 26 janv. 2015
Ion thrusters are great, but have extremely tiny force (photon thruster even less). Must have more thrust than weight or you don't go up.
Elon Musk
@elonmusk
Final one: anything launched by a railgun (if you could ever reach ~ Mach 27) would explode upon exiting the barrel in our dense atmosphere
08:28 · 26 janvier 2015 · 0 vues
224
367
921