The engine would be in orbit, producing a beam of photons. The spacecraft would not have to carry that mass along.

All I can say is a picture is worth a thousand words.

Clearly if you can do it than I have to be concerned that someone else can as well.

The temperature reached as high as 2,500 degrees Kelvin during the tests. High temperatures mean high acceleration.

No one has ever done this before. These results would not have been possible without newly developed ultralight, high-temperature sail materials and beamed-energy propulsion methods.