May by you are right my dear Skybolt,there was Ambrosini SAI-503,an improved versionSkybolt said:Sure, but please start a new topic on this. BTW, there was a 404a and a 504, too. But for those you'll have to wait Italian Secret Projects.
The text.hesham said:Hi,
in Le FANA December 2013 issue,they spoke about SAI-504 as a single seat
fighter project developed from SAI-403,with 1400 hp Isotta Fraschini Zeta
engine,also SAI-403 A,B & C unbuilt projects,Type A interceptor with two 12,7 mm
cannon,Type B multi-role fighter two 20 mm cannon and Type C long range fighter.
https://forum.warthunder.com/index.php?/topic/197858-progetto-tech-tree-aerei-italiani/&page=161Arjen said:Hasan, your link is not complete. With the link you gave, I need to search 216 separate pages.