Reactionless spacedrive works!

[Mirannan]

No, not a late April Fool. A Mach drive unit is now in engineering development, meaning work is being done on efficiency and total thrust. Expected to take about 10 years.

Mach Effect Propellantless drive awarded NASA NIAC phase 2 study | NextBigFuture.com

 

[Parson]

The science here is far, far, beyond me. But the concept, in so far as I understand it, seems workable, and hopeful in the long range.