Astounding RC flying with counterrotating drive

Barry writes, "There's a thing called pattern flying, where pilots compete to perfectly execute an elaborate set of compulsory tricks."

They do it for real, RC modelers do it, and they do it indoors with planes lighter than a pack of cigarettes. And the Finnish (because of course there's an international competitive scene) team's rocket scientist/Q has invented a cool counterrotating drive that is rocking this secret world. Mesmerizing – a playful robot fish in a huge tank of water.

2015 Finnish Open F3P-AF Janne Lappi

(Thanks, Barry Devenney!)