@knp7765:
In fact, it looks like what WOTC decided to do was to make all the pieces in each class a roughly uniform size – all carriers are 64mm long, all battleships are 58-62mm long, all cruisers are 50-56mm long, etc. I think that probably makes more sense for gaming purposes. That way each class of unit fits within a certain size limit so they will be easier to recognize by gamers. If they went by actual sizes, we would end up with some battleships being larger than carriers, some cruisers being larger than battleships and so on.
Yes, an example of that being the three types of aircraft in Global. The strategic bombers are all large, the fighters are all small, and the tac bombers all about midway between the two other types of units. The size variations between groups of planes and ships tends to be greater than the size variations within each group. For gaming purposes, the size-based visual cue about a unit’s general type is a useful thing to have. If I’m not mistaken, by the way, all the destroyer sculpts ever used in A&A games have had transom sterns, which is another instance of a useful visual cue.