Now this is interesting. I had not heard much of anything about the X-37.
http://www.space.com/news/090602-x-37b-space-plane.html
Seems if they take this tech demonstrator to the next step one day, it won't be the end of a shuttle like vehicle at all?
quote "Details sketchy
While next year's flight profile remains a bit hazy, reports have the X-37B under auto-pilot control zooming into Vandenberg Air Force Base for a landing, or perhaps at Edwards Air Force Base, California.
As a reusable space plane, the intent of the craft is to serve as a testbed for dozens of technologies in airframe, propulsion and operation, and other items in the hopes of making space transportation and operations significantly more affordable.
According to earlier press releases issued by Boeing, the X-37 orbital craft is capable of circling Earth for up to three weeks.
"Potential new commercial and military reusable space vehicle market applications for these technologies range from on-orbit satellite repair to the next-generation of totally reusable launch vehicles," explained past Boeing-issued material.
[NASA's mission last month to service the Hubble Space Telescope marked the last satellite-servicing mission by the shuttle fleet.]
The intent of the X-37B mission is to try out a wide variety of experiments and technologies, including a highly durable, high-temperature thermal protection system; storable, non-toxic liquid propellants; and important new aerodynamic features - all of which are applicable to future reusable space vehicles.
The vehicle is about 27.5 feet long with a roughly 15-foot wingspan and tips the scales at about 5 tons at liftoff."
Pete