BHRxRacer
(Banned)
- 1,214
I've seen supersonic flybys.Airshow speeds aren't representative, you wouldn't see much of the planes and they wouldn't be around for long if they went full-bananas all the time.
Plus... the silence was your perception. A number of development aircraft blow the exhaust upwards and outwards, with fly-by-wire unmanned aircraft this is much easier to mitigate against with the control surfaces. The description of what you saw doesn't sound normal but than R&D craft aren't.