I noted a very High drag coefficient (Cd) of 2.727 for a parasail, and lift force (as for any parasails), tested and reported on:
Sea recovery system for small UAV | NTU Singapore
Title: Sea recovery system for small UAV
Authors: Muhammad Feroz, Muhammad Shaffarudin
I tried to summarize the information of the potential and advantages of (train of ) parasail(s), first due to their own respective lift, second due the high Cd, so a high thrust coefficient _ being combined drag and lift coefficients _ (Tc), in a preprint:
Parasail-based Airborne Wind Energy System
https://www.researchgate.net/publication/378970090_Parasail-based_Airborne_Wind_Energy_System