I and the people and contractors that I manage or oversee had to design and build the TRAM models from scratch. This took a lot of time. It is only now that the initial wind tunnel testing has begun. This testing is currently underway in the DNW wind tunnel in The Netherlands. This follow-on testing will happen in a couple years.
Safety is an important part of wind tunnel and rotorcraft testing.
Test models and wind tunnels are very expensive facilities and great care has to be taken to insure that no damage is caused to these facilities during testing. And, always, care must be taken to insure that people are not put in harm's way. All of this material is written and reviewed by several people. The test results are studied and then reported in various types of formal reports including technical conference papers and NASA-distributed reports. Most NASA reports are openly available to the public.