interesting on wiki - clearly at 113db it was insanely loud, but they seemed on track to hit 95db at 200ft - which is massively quieter.
at these lower levels, was it still to be a dead duck?
PS is it right that a single pegasus engine failure (not unheard of in the harrier), would have been catastrophic in any non-conventional flight modes of the Do-31, and maybe in any regime? Did it ever fly with someone not in an ejector seat?