The craft takes up much of the vast hangar where it is being built.'Sorry, I don't have anything to say about this topic right now', Brin wrote in an email when asked for comment by Bloomberg last month.
Alan Weston, who previously led Nasa's Ames programmes is leading the project and has spoken about the possibility of airships carrying freight.'New airship technologies have the promise to reduce the cost of moving things per ton-mile by up to an order of magnitude', he said in a 2013 interview.
It is unclear if this is a private venture or could be used commercially for transporting goods.
He adopted that project’s title, Oracle, for his own firm, which he developed into the world’s foremost supplier of software for information management.
Insiders say Brin decided to build his airship around three years ago after regularly visiting the Nasa Ames Research Centre in Silicon Valley.
Engineers have already finished the frame of the craft which looks like a zeppelin.
Oracle employs 200 people in Israel and has been operating here since 1996.
Ellison, however, only visited Israel for the first time in 2007.