I need to find that video I saw on traveling to Proxima Centari and link to it here. One of the options was a ship just over 1 km long. IIRC it would have 100,000 H bombs on board, and that would be sufficient to propel it to 0.1C. It would be pretty cool to watch it during the acceleration phase.
But all that was before zero point propulsion ...
Zero Point - Classified Anti Gravity Craft - UFO Full Documentary
Narrated by Mark McCandlish USAF illustrator.
Who is McCandlish?
Is the Mark McCandlish Alien Reproduction Vehicle Nothing More Than Project 1794? (a jet propelled vehicle)
See McCandlish's replies in comments section.
OT
Former Defense Industry Technician Makes His Voice Heard At Anti-Geoengineering Event (Mark McCandlish)
... exposing and halting global climate engineering programs that are decimating our planet and the entire web of life