Hi Steve -- Welcome to the Forums!
Unladen? That sounds like the dry (or curb) weight. Airstream's website has been up and down on whether that section of the FAQs is working; it currently is not. We've archived their trailer weights pdf at
http://www.airforums.com/forums/f238...hts-35742.html. Darol was right on with the numbers. What's missing from the pdf and probably only available with the actual manual is the GVWR (trailer GVWR minus payload equals the dry weight). Payload may be something between 750#-1000# for a trailer this size. Anybody have a better number on that?