The alternative towing rules have been changed. The ship's movement distance now has a greater impact. Before, a ship's tow strength was 163*(Engine Contribution) + (Distance Factor). Now, the formula is (Engine Contribution) + 19*(Distance Factor). In particular, ships with, say, 3 engines can now tow a four-engine ship in some cases. The distance factor now also considers fuel on the ship. If your fuel suffices for 40 ly only, your distance factor will be 40, even if you have a gravitonic warp 9 ship.
The actual factors can be changed to emulate the old way (TowStrengthEngineScale, TowStrengthDistanceScale), the fact that fuel is considered can not be changed.
The ability to tow can now be freely assigned to ships instead of just depending on whether the ship has one engine or more. Especially, you can remove tow ability from big baseships, or give it to small scouts.
This new tow strength formula is also available in PHost 3.4b.
