Ok so you want the Spanish republican government to fight this guy (José Antonio Primo de Rivera) or this guy (Miguel Primo de Rivera) in the Spanish Civil War? What would the importance be to Spain if they had backed these submarine projects? As for the "autogyro" the Americans have VTOLs so.... But maybe the Spanish can use it as a scout craft? As for Spain not being backwards, thay can't be, because they will be a major Allied power so they will have to be powerfull. So ideas on how to make them powerfull? PS: i will try to take screenshots soon.
Well, if the Spanish goverment had backed the submarine project, it is posible that Spain had a quite good submarine Navy, specially if Spain is not backward as in OTL. The same goes for the Autogyro, if that project had been also backed, Spain could have developed the helicopter tecnology (and a good scout craft).
I mentioned Primo de Rivera as leader of Spain, for example winning the elections or, if there is a Civil War, in one side (fighting left-wingers or monarchists, depends of what ideology had the other side). The reason for "him instead Franco" is that Franco was very conservative, and that mentality tends to hinder tecnological progress.
Spain powerful? Well, when beginns the divergence with OTL? Late XIXth Century or before?
