Re: Titan Style Games
With the citys tracks they needn't be there perminantly (terrible spelling) they could stay for a little (less then a minute) and then fade. That might take some strain off the engine. With the inside of the city only one floor would really need to modelled in total (Probably the top tier). With boarding the airship prehaps the tractionists shoot it down first (slow leak) and then board and destroy the wreck.
This'd give Green Storm an advantage at the start of the game (more speed and mavuverablilty) and the city would be harder to destroy and would mount heavier guns, that'd give the tractionists too an advantage, so that all in all it'd be pretty balanced. Early game advantage to Green storm, and late to tractionists.
Not sure about the wall though... we could always have a small city... but even that'd be huge.
Furthermore; I wish to dismiss the preposterous notion that a machine heavier than air could fly under its own power.