That's really long for what appears to be a non-rigid airship. The Navy class-N ships were about 400 feet long, and I had thought they were the largest non-rigids; this was thirty feet longer and forty years earlier.
Yeah, that's weird. "Morrell constructed a 450-foot spacecraft at the Morrell Airship Company on Market Street. The craft was designed to run by gasoline engines powering wooden propeller blades draped with oiled silk."
I supposed it's possible that was an accepted term in 1908, but this article was written in 2012, so I have to assume it was an error.
