The grandparent comment is correct. There is no such thing as engine-specific “maximum speed”. If you add more fuel, you can always go faster (until the speed of light).
Even “until the speed of light” has a caveat (hear me out). Would you call getting from A to B in 1 hour on your watch instead of 2 as “faster”? If your answer is yes, then there’s no limit to how “fast” you can go. You could get from here to the Andromeda Galaxy in one minute. It’s just that for the Andromeda and the Milky Way a LOT more time would have passed.
No, that is the time to maximum speed. Maximum speed depends solely on exhaust speed (how fast the particles get accelerated).
And no friction in space. Well, almost none.
What’s weird is that they say km/h. Space and rocket stuff is usually in m/s.
The grandparent comment is correct. There is no such thing as engine-specific “maximum speed”. If you add more fuel, you can always go faster (until the speed of light).
Even “until the speed of light” has a caveat (hear me out). Would you call getting from A to B in 1 hour on your watch instead of 2 as “faster”? If your answer is yes, then there’s no limit to how “fast” you can go. You could get from here to the Andromeda Galaxy in one minute. It’s just that for the Andromeda and the Milky Way a LOT more time would have passed.
You are incorrect. If I am traveling at 90 % speed of light, take a stone and throw it out the back… I am now faster.