Finally I think the OKE Precision Winch “Reel and Rotate” @ChristianH 's device could be also used for electricity generation AWES in pumping mode (yo-yo, reeling) by combining it with KGM @MarcoGhiva 's device.
In this way it would be possible to implement loop-figure in yo-yo mode.
That said some adaptations would be made, to allow the free rotation of the OKE device: this should have a central hole allowing it to slide through the bar (then central) of the KGM thus modified, while it rotates around said bar. The bar can be tilted.
During the reel-out production phase (several loops) the OKE device moves forward, then during the reel-in depower phase the OKE device moves backwards while it stops rotate.