Comments

I assume the people who are critical of the removal of logs own no wood or paper products... One question comes to mind. Instead of having the helium offset just the weight of the vehicle why not have enough helium to carry the vehicle and the cargo? I know, that makes the airship hard to handle. But, put a water tank inside the envelope that can hold a weight of water equivalent to your cargo limit. Fly the airship to the site, hook up the cargo, dump the water, fly away. The thrust requirements for the fans should be dramatically less.