KeithPickering wrote:
Specific impulse and thrust depend on how much and how rapidly fuel is burned. I don’t believe we know the answers to those questions yet.
Amending my own post: specific impulse is 1/g times the exhaust velocity. At 11781 km per second, or 11,781,000 meters per second, specific impulse would be about 1,201,334 seconds. But of course, that’s still very much a best-case scenario.
