Perlan 2 has exciters to induce flutter in flight! That’s brave
Something done on all aircraft, the 747 had issues prior to remedial action. A F-117 was lost after a loose elevon led to flutter strong enough to cause a structural failure. Not unusual.
https://www.wired.com/images_blogs/a...1996104074.pdf
The following is a NASA test flight made by astronaut Fred Haise. Of the flight Fred commented, “I’m fearless, but that scares me.” Test pilots earn their money, as you say
IFT "thats brave"..