Kitty Hawk reveals its secret project, Heaviside

> On the helicopter, there’s a little bolt on top, and if you unscrew that, you take the cotter pin out, we all die.”

I imagine that's hard to do while in operation.

Meanwhile, a heli has autorotation, which is quite convenient in various failure modes.

Your quote refers to the "jesus nut": https://en.wikipedia.org/wiki/Jesus_nut, which doesn't apply to newer helicopters.

I'm curious - surely there's still some single point that would let the rotor fly away? What does it mean that newer helicopters "doesn't have" this? I mean the rotor is attached? It's a single axel? There are scenarios where the rotor falls off?