FWIW, Isp is measured in seconds and by multiplying it times gravity, you get the exhaust velocity. I believe this was done to more easily compare rocket effici

FWIW, Isp is measured in seconds and by multiplying it times gravity, you get the exhaust velocity. I believe this was done to more easily compare rocket efficiency regardless of units of gravity. It looks like you're doing this calculation: Isp * Gravity / Gravity If you're trying to predict the hover duration, that will depend on the delta V of the vehicle. Then, a hover duration would be: Delta v / Gravity Not sure what the expected delta V is for the Dragon though.