Crea87 wrote:
...found this interesting concept on the net .....an aerodynamic sail shaped balloon would actually work or not.
Just how light would the ship need to stay ? ... would the addition of electric motors and solar panels destroy its buoyancy?
Have a look at: www.airship.org
buoyancy will depend upon how much weight you add. More weight = need for greater volume of lifting gas (bigger airship), in most cases.