What these numbers mean

• Figures are SCU of fuel, summed across every tank the ship's own default loadout fits — a Gladius carries two hydrogen tanks, a Carrack two. This is the same unit quantum drives measure their burn in (SCU per gigametre).
• Range (Gm) is how far the ship can quantum travel on a full tank — quantum fuel capacity divided by the fitted drive's fuel burn per gigametre, both figures read from that patch's own files. It excludes acceleration and spool, so it is fuel-limited distance, not travel time. Every drive declares unlimited range of its own, which is why the tank is the whole constraint.
• Fuel burn per gigametre is identical on all 63 drives, and no ship's stock drive was swapped. That is what makes the range column exact: range moves exactly in step with the quantum fuel column, so a hull whose tank doubled jumps twice as far.
• Quantum travel SPEED changed on every drive in the game — and in both directions. 144 ships get faster, 33 slower, median +20%, with the biggest winner up +147%. The 890 Jump more than doubles (512,000 → 1,262,910 km/s) while the Gladius loses ground (190,000 → 161,411 km/s). Speed is a property of the drive, so it is unaffected by the tank changes — it decides how long a jump takes, not how far you can go.
• 4.10 compresses jump range rather than cutting it. The gap between the shortest- and longest-legged ship narrows from 245x to 57x, while the median barely moves (143 → 154 Gm). Big ships gain the most.
• There is no hydrogen equivalent of the range column, and that is a limit of the data, not an oversight. Thrusters state their burn as a rate per 10 kN of thrust in engine fuel units, and nothing in the files converts that to the SCU the tank is measured in — taken literally a Gladius would empty its 4.9 tank in about a second. What is exact: burn rates and intakes are unchanged, so flight endurance changes by the same percentage as the hydrogen column. A ship at −88% capacity has −88% flight time.
• Thruster fuel burn did not change either, and neither did fuel intakes. On the raw data the hydrogen cut is a straight endurance nerf, not a rescale hidden behind cheaper consumption — expect to visit a refuelling station far more often.
• Big haulers and explorers are the quantum winners — Carrack 10.6 → 20.9 SCU, C2/M2/A2 Hercules 6.6 → 20.9, A1/C1 Spirit 1.8 → 5.9. Light fighters lose a little (Gladius 1.3 → 0.6), and both Idris variants drop hard (120 → 31.5).
• Every tank the ship carries is counted, and only tanks. A hull with more than one is summed — the Cutter Rambler's roof expedition tanks add 0.9 SCU of hydrogen and 0.9 SCU of quantum on top of the standard Cutter's. Detachable external fuel pods are excluded: the Starfarer's six 12 SCU pods and the Starlite's two are refuelling cargo it sells or transfers, not propellant for its own engines.
• One row is a bug fix, not a nerf: the F8A Lightning's 100 SCU quantum tank on LIVE was a placeholder record borrowed from the Hornet. 4.10 gives it its own 0.9 SCU tank.