I put again some links and an extract of my comment from What is possible with Payne's patent US3987987 figure 5? - #44 by PierreB as I think this topic is yet more appropriate.
ShieldSquare Captcha, the same on
https://www.researchgate.net/publication/325833533_Assessment_of_an_Alternative_Concept_for_a_High-Altitude_Wind-Power_Generator.
The figure 9 represents the curve of power for a 20 m², 5 kg paraglider at different wind speeds. The computed power is 6000 W at 9 m/s wind speed.
As a preliminary comparison with a reeling mode the tests on “hydra” (14 m²) with 10 m/s wind speed result in an average of 5.75 kW and an average power generation of 13.8 kW (table 8, page 44 of https://repository.tudelft.nl/islandora/object/uuid:56f1aef6-f337-4224-a44e-8314e9efbe83/datastream/OBJ/download ).
Tests of the tri-tether rig with the same wing and similar conditions could lead to a fair comparison. Otherwise the simulation could also include the drag of the wing with the tethers, taking also account of the weight of the tethers in regard to the wing area, then the resulted expected power. Some advantages can be expected such like a better safety thanks to the three tethers and a continuous generation.
I would add Dave’s video:
