Saw it too and usually this guy is quite reliable, well informed and rarely posts.
Let‘s wait and See …
Crosspost from the H-20 thread:
Interesting correction regarding this rumour: Allegedly this claim is not related for the H-20 but „I meant to say that the third prototype of the J-36 has gone through multiple taxiing tests.“

The purpose of flight testing prototypes is to verify if the designs work as intented, and also to find any flaw or sub-optimal features, after evaluating test flight data they will then modify the design and test again. And the circle goes on until all are satisfied.I wonder what is the relationship of the 2 J36 prototype, since these 2 showing up flying in formation , does this hints at that both configuration is being valuated and tested ?
#3 first flight
View attachment 166820
Back to 1# nozzle, I'm fall in love again.
EDIT: Or not?![]()