Numbers are a crucial parameter not only in establishing effective,projectional,operative value of a new weapon system,but also,indirectly,its cost.
If indeed,on the one hand, a established,condition-planned low cost can "codify" for a high number of unity in the production phase,on the other the same high unity's number aid to maintain low the cost in the middle period(writing off,at example,research's expenditures on a greater number of unity).
From the "crossing" between the function describing this dynamic equilibrium-governed parameter and that describing the technological and tactical impact(in the expected operative theatre and fruition role)of the single systems implemented in the design, you obtain the cost-efficiency value.
Now the very difficult question become only establish if F-22(with all possible modifications) in a significant higher number(like 600-700) would be,in the 15-20 time-projection’s window, a more cost-efficient aircraft than JSF (F-35).
From the the possible responses to this question derive also the motivations who each of us give to the choice of USA of prohibit ,still now,F-22(a VLO-high kinematical-performant aircraft )sale to any other nation (historical ally too)and,conversely, place “exportability”and even joint development at the foundation of the project JSF-F-35 (a VLO-low kinematical-performant aircraft).
