Starfleet records. The most important starships of the Fleet. USS Enterprise (NCC-1701-D), part. 4: Technical data (3). Propulsion systems. The acceleration delay between slow-reverse impulse and top warp speed, or about warp 9, was 0.300 milliseconds. Source TNG: "The Last Outpost". Warp speeds above 9.3 are beyond the red line. The maximum warp speed was warp 9.6, which could be maintained for a few hours. It is possible to achieve warp 9.65. Warp 9.8 is also achievable in theory, but at extre