None that I know of, but multi-rotors lateral flight authority is often weak vs winds. So, I would worry that a big gas bladder might strongly exacerbate that b

None that I know of, but multi-rotors lateral flight authority is often weak vs winds. So, I would worry that a big gas bladder might strongly exacerbate that by requiring a much higher capability vs wind. But then again, a hybrid might not be a 'conventional' multi-rotor config.