I know not if this has been linked here before -- a long ago video of an event during WW2 (not to forget that it was preceded by Germany and the U.K. -- also viewable):
Although mainly about the P-59, it was also as much about early aircraft testing methods which, having retired from the Navy at the Naval Air Test Center, Patuxent River decades ago, I found just as interesting.
Teaching a pig to sing wastes your time and annoys the pig.