The Shadow of the Eagle on Twitter: "Let see, the Northrop P-530 was a model that failed to sell, it became the P-600 and enter the LWF program as the YF-17 ,
Northrop YF-17 - Wikipedia
Space Security on Twitter: "@nicholadrummond Northrop F-5 (also the Northrop P530 Cobra prototype) https://t.co/L06oRiTQHm" / Twitter