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(from angiepalmer.wordpress.com... note it says Jan 31, but my coworker said Today)
The following press release is from Holloman AFB:
Officials at the Holloman High Speed Test Track have announced they will attempt a world record test run on Jan. 31.
The test is part of a project for the Navy, which will blast the rail-mounted rocket sled to a speed of Mach 8.9. The sled will carry a Sandia National Laboratories-designed payload and will reach a predicted velocity of 6,494 miles per hour and detonate at the north end of the track. The current record is 9,456 feet per second (6,453 miles per hour) or Mach 8.6.The sled train will consist of three pusher sleds and forebody sled. The motors will deliver a total thrust of 814,000 pounds. The payload will travel a distance of 3.61 miles in about 6 seconds. A helium tent will enclose 2.77 miles of the track in order to reduce the aerodynamic heating and drag on the payload.