The math here is seems to be broken.

The xenon ions are what is being expelled at 40 kilometers per second. The reaction force from these ions is what pushes the spacecraft forward. Granted, I did not count for an efficiency factor, but the m1v1 is the mass and velocity of one xenon ion atom. I converted to grams in the end. The answer was initially in kg.

Show your support

Clapping shows how much you appreciated Brandon Weigel’s story.