On the Thoth website, they give the patent number, and you can look up the patent online for more details.
Basically, he proposes to make a tube 230m diameter, with the tube walls composed of smaller diameter (0.5 to 1 m, if I read it correctly) tubes aligned lengthwise made of superdy-strong material pressurized to 1,400 bar to keep them in tension. The "active guidance" comes from gyroscopes and from varying tube pressure as required. The superdy-strong material is 1.4 cm boron or Kevlar or whatever. Maybe the Superman's cape material. Anyway, it's pressurized, but not inflated like a balloon. Looks like wind loading hasn't really been considered in any detail. Nor is elastic stability, for that matter.
I haven't priced boron out per pound, and suspect the inventor hasn't either. But it looks like about 1.3 million tons of it required, fabricated. So if anyone's got a million tons of scrap boron tubes laying around, this might be a good way to put them to use.
Reading through it all is a lot like reading about the Starship Enterprise, where it is all made to sound entirely reasonable except for the minor detail that the whole thing is just fantasy on the face of it. Obviously, a lot of time went into thinking of all this, but they should have gotten a good sci-fi story out of it instead of spending money to patent it. Which, come to think of it, I can't imagine why anyone spent money to patent it.
