IO9 presents The Astonishing Speed and Beauty of Rocket Sleds. The subject images are from a compilation on OObject, which provides links back to the source pages. The following photo is one of my favorites. The sled traveling at 4,800 ft/s (3,273 mph). It was photographed by Alan Sehmer of Sandia National Laboratories ©.
All my rocket sled posts can be found here.
I also decided to capture the raw links from the OObject site: