I've been playing Airline Empires on and off for about 2 years now and found something out about one year ago that i have seen no-one mention on the forums. I found out that demand always comes in a 1F-6C- 43Y configuration or a multiplication of this configuration. As a result, all my airplanes are always configured in this configuration or thus a multiplication. This way, my airplanes can always fill the demand completely without over- or underfilling the demand.
In my opinion this is also something that could be changed for a next version of Airline Empires, since in real life I think there are some routes with much more demand for Business Class (for example JFK-LHR) than others (For example a touristic route, like JFK-BCN).
Am I the first one to discover this, or not? And would you think this should be something to be changed?