On Thu, May 19, 2016 at 01:11:10PM -0400, Jeffrey Schwartz wrote:
> I'm kinda wondering what would happen if you skimmed off 0.001% of the
> kinetic energy of a tachyon passing through the sail.

According to current theories, if tachyons were to exist, they would
always have less kinetic energy than photons of the same momentum.
In some cases, even zero or negative.

- Tim