(Warning - informed speculation!)
Adding an updated top view of my personal opinion of what FCAS/NGF might look like, based on what we know about Dassault's design preferences and the Onera/DLR Levcon studies, and a heavy dose of inspiration on my part from the A-5 Vigilante and Mirage 4000.
This is to illustrate one option that Dassault might choose in order to achieve conflicting requirements of minimum drag and good supersonic performance, high maneuverability, low carrier approach speed, large internal fuel volume, a long internal weapons bay for a single large store (French nuclear AS4NG missile), exportability etc. The key design choices illustrated are:
- Triple delta wing with LEVCONs (Onera/DLR studies)
- A-5 Vigilante style internal arrangement with high-fineness ratio, large payload volume between the 2 engines, and fuel tanks in area ruled dorsal hump
- Ruddervators (as on YF-23 / NGF mockup)
- Relatively small engines (10-12t thrust, similar to M88-4 or F414 EDE)
- Constrained size and emphasis on design choices that reduce structural weight (versus other 6 gen fighters), to lower costs and favor export sales... I am assuming an empty weight of ~13.5t, design combat weight of 18-20t, TO weight (clean) of ~25t (with 800-1,000nm combat radius), MTOW of ~34t (with 9t of external stores or CFTs)
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I'll come back in 10 years and see how far off I was... if FCAS pans out lol.