It is famous that an argument occured among Historians: was the Arado 530 just an Arado code or an official code with preliminary order? With secrecy now over, I can tell everything (beyond Reality):
- the E530 was an Arado project, twin-fuselage, with asymmetry in the pilot position
- the official Ar-530A was a twin-boom derivative featuring a free nose (P38-way) probably to send flowers to foreign aircraft
- the Ar-530B was coming back to twin-fuselage layout, with less asymmetry if ever one engine fails
- the Ar-530C went further with fuselage asymmetry of the Ar-530B