Now that one worked. Thank you for your persistence. When I got to the CAFE Foundation webpage I remembered it and the first link was already visited, so I must have tried and got the error previously. In any case I've got it now.
So they found muffling but no power increase. But they did measure 1--12 pounds of jet thrust on their test engine.
I'm still digesting what I've learned with the 'coanda nozzle' search. The Advanced Aerodynamic Devices article is at:
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