Jan Roskam's « Selene », « Ourania » and « Eris » designs

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In the second volume of his series on Airplane Design, Jan Roskam starts from a basic fuselage configurations and develops three distinct aircraft concepts from it:

• A twin-engine propeller-driven airplane, the Selene, after the goddess of the moon in Greek mythology.
• A jet transport, the Ourania, after the Greek muse of astronomy.
• A fighter, the Eris, after the goddess of war in Greek mythology.

Here is the basic fuselage design that Roskam starts from:

 

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Here is the three-view arrangements of the Selene, the Ourania and the Eris:

 

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Here are the basic specifications of the Selene, Ourania and Eris as they compare to existing aircraft in their respective classes:

 

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Here are detailed diagrams of the Selene:

 

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Here are detailed diagrams of the Ourania:

 

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Here are detailed diagrams of the Eris:

 

[Kryptid]

Eris is called a fighter, but I'm guessing it's really more of a strike/close air suppport/COIN-type aircraft?

I wish I could find more diagrams of aircraft which had fuel tank placement illustrated...