After one billion years, the speed would be 20 km/s and the displacement 34,000 light-years, a little over a third of the estimated width of the Milky Way galax

After one billion years, the speed would be 20 km/s and the displacement 34,000 light-years, a little over a third of the estimated width of the Milky Way galaxy. https://en.wikipedia.org/wiki/Stellar_engine https://en.wikipedia.org/wiki/Stellar_engine