OT: Round the Pole Airplanes

erco

Am I going mad...? I could have sworn I saw indoor "round the pole" tethered electric airplanes at Hobby King in the last few weeks, somewhat like the video below. Anybody remember those at HK or elsewhere?

xanadu

Reminds me of turning downwind to base in a small piston aircraft at a busy airport.

hazlett

The video looks familiar to me.