While the strict definition of a sixth generation fighter varies between sources, there is little argument that the race is on for a new generation of air dominance combat aircraft.
While the US NGAD programme has now solidified into the Boeing F-47, the Tempest, the TAI Kaan, and SU-75 are, arguably, lesser known quantities.
What's going on in China is equally interesting, with new videos emerging of the likes of the J-36, with its three engine, tandem cockpit configuration leaving many scratching their heads as to whether it is a fighter or a strike aircraft or an interesting hybrid.
Lockheed Martin has been reported to be planning a 'NASCAR' upgrade to the F-35 to give it 80% of the F-47's performance for 20% of the price.
With so much happening in this field, it would be good to have a discussion thread to share opinions, analysis and sources, as well as indulge in a bit of wild speculation.