Mach 2 with Propellers? Looks to be hints of an old effect revisiting!

[Jatwaa]

New design and old problems! This bit of hilarity made for a very interesting flight and even more laughter than I anticipated. I thought this effect was eliminated, but nonetheless, it is back!

[BagelRabbit]

"What's going on?!"

Congratulations, you've discovered the potent effects of infinigliders. They are byproducts of a flawed aerodynamics system in KSP, in which control surfaces begin to "flap" and produce thrust. The propellers weren't speeding the thing up, it was the control surfaces flapping out of control. As the craft gets faster, it's buffeted more and more by the air around it, which in turn causes faster flapping. This positive feedback loop can be terrifying, game-breaking, and really awesome.

Sorry for shamelessly promoting my videos all over the place, but here's some good things to do with infinigliders. The third Thing do Do with Infinigliders on the video... well, you thought your craft was doing crazy things. It's definitely worth experimenting with, as I think that you'll enjoy the results tremendously

By the way, I enjoy your videos but they don't really belong in the "Fan Works" section. There's an entire subforum dedicated to video-makers called "Live from Mission Control" that would probably be a better place to put your stuff. In addition, for the sake of consistency, many YouTubers are condensing all of their videos into one thread which they update regularly; this might something to look into.

Nice video as always Jatwaa, see you next time!