Add nozzle exit area as a property on ModuleEngineConfigs

[jwvanderbeck]

Exit area of the nozzle is an important property that can be used for lots of calculations by RF or other plugins, and it would be great to have it here in RF as a central place.

[jwvanderbeck]

Presumably stored as m^2

[blowfishpro]

Theoretically, you can calculate this from the difference between SL and vacuum thrust (at least for de Laval nozzles - aerospikes are different of course): Thrust_Vac - Thrust_SL = Area_Exit * P_SL. Of course there's no guarantee that this actually matches the area on the model.

[Librazy]

So...^You can try my EngineDevelopment for that(Smile