Overloading a Spaceship, and volume (Spaceship rules)

[Ulzgoroth]

Originally Posted by PTTG

Acceleration changes, and delta-v gets worse if your ship has it. Luckily the math is easy; multiply both by (Nominal Load) / (Current Load).

Not so for delta-V unless the reaction mass fraction is initially at the low end. You could lose more than that if you're benefiting from high fuel fraction.