Helicopter with intermeshing rotors - GIF

[mcthistle007]

Telling the old joke about a butt-crack was not a good idea, just as the plumber arrived, Bob.
- You know what they say: "timing is everything." I'm sure we can find another plumber before the house floods.

So What Happens as the Gears Wear in Time? Which they will. I can see this Bright Idea becomeing Somebodys Last Day on Earth. FFS!