[Spaceships] simply fuel math...

[Ulzgoroth]

Originally Posted by Anthony

Formula for delta-V is ISp * ln( loaded/dry ). However, if ISp and delta-V are not in the same units, you need a conversion factor. ISp has historically been described in pound-seconds per pound (where the first pound is a lb force, the second pound is a lb mass), or just Seconds.

...Which amounts to g-seconds, but who's bothering with actually communicating well? Apparently not historical American-units rocket scientists.