As above^
Higher AF designs can see their range rounded quite aggressively.
This is because Air Force units have their final range, in hexes, calculated using the <AP/Hex> rate. But Action Points can only be used in
whole numbers. This means that the 100 Action points a unit begins the turn with (usually, but bonus AP?) is divided by a whole number to give the current-turn operational range of the unit.
...So hex-range in hexes is always evenly devisable by 100 or the next lowest whole-number numerator, ie. range in hexes can only = the following numbers: {100, 50, 33, 25, 20, 16, 14, 12, 11, etc...}, as for AP costs from '1' and ascending.
...if that makes sense...my high-school math is kinda weak I realize.
(There was a good thread on the forums here explaining how Air Force ranges are calculated some time ago, which it would be nice to find.)