All this helium balloon stuff got me thinking of the Hindenburg and dirigibles. With the help of Bill an extra smart engineer who studied at Caltech, we have decided that hydrogen not helium should be used in lighter than aircraft and that diesel should be the fuel of choice for the engines. Hydrogen got a bum wrap for causing the Hindenburg fire. Aluminum oxide, static electricity and shellac ignited the fire and hydrogen then burned. I am pretty sure I would not travel in a new Hindenburg that I may design but I would use it to deliver heavy equipment to remote areas like the North Slope of Alaska. The pilot would get double pay for hazardous duty or perhaps the dirigible could be remote controlled just like the drones the Air Force uses.
The National Hydrogen Association had a piece on a remote controlled drone that was powered by hydrogen fuel using a half horsepower fuel cell that stayed aloft to almost a day. The puny little drone might be able to carry a pea sized camera but my green machine could lift a tank. The National Hydrogen Association should go back to physics 101 and realize they have a massively buoyant chemical and a puny fuel. As for Falcon he may become forgotten like a Ford Falcon the car that certainly could never fly.