I don’t know who you are addressing this to, I haven’t made any superiority claims regarding AWES you list here. I agree there are several problems which can be discussed, all I said the theoretical 4/27 limit isn’t one of them since there is possible for a device to extract 8/27 during tether pull phase in pumping mode. I wasn’t ignoring that document, I simply said that if an autogyro can reach a Cd greater than 1 during vertical descent, that 4/27 figure is obviously flawed.