First Video: Radio controlled to the tune that it has adjustable steering and adjustable throttle? No, I would say not. I would however say it is a rocket propelled vehicle which is remotely started. You get the initial circle started with the line and then the rocket engages via remote and the line then becomes just a guide. That's just a guess, though.
Second Video: Not what I would call "typical-RC," either. Yeah, it's steerable, but it's aided by a gyroscope which self-corrects (much like that in an RC Heli). Nic Case is one heck of a builder and driver. I hope he reaches his wanted 200MPH.
Cheers,
Kyle
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