The US Air Force's aims with each X-37B mission continue to be shrouded in secrecy, but we're learning a little more now that it has launched the autonomous space plane for a third time. In once more flying the OTV-1, the original vehicle that reached orbit in 2010, the military branch is clear that testing reusability is a major goal: it wants to know if these spacecraft can take more than one trip without suffering ill effects. We likewise know that navigation, re-entry and other basics will be under scrutiny, even if the military won't talk about the payload. Just when we'll see OTV-1 back on Earth is another matter. The USAF is still standing by its official line that the X-37B is built to stay spaceborne for nine months, but it's remaining open to longer missions if conditions permit. Given that OTV-2 took more than a year to return, we wouldn't be surprised if we're just becoming comfortable with 2014 by the time the vehicle's sibling touches down.
Air Force launches 3rd X-37B Orbital Test Vehicle
by Maj. Eric Badger
Air Force Public Affairs
12/11/2012 - CAPE CANAVERAL, Fla. (AFNS) -- In the next installment to improve space capability and further develop an affordable, reusable space vehicle, the Air Force conducted its third X-37B Orbital Test Vehicle launch here on December 11, officials said.
The launch comes on the heels of the successful flight of OTV-2, which made an autonomous landing at Vandenberg Air Force Base, Calif., June 11 after a record 469 days in space.
"We couldn't be more pleased with the strides we've made in this program and the success of the X-37B vehicle on the first two flights," said Mr. Richard McKinney, Deputy Under Secretary of the Air Force for Space. "However, it is important to keep in mind that this is an experimental vehicle and a third mission is still relatively young for a test program. This is the first re-flight of a vehicle so that is certainly a key objective for us. We have only just begun what is a very systematic checkout of the system."
Lieutenant Colonel Tom McIntyre, X-37B program manager for the Air Force Rapid Capabilities Office, explained the third X-37 flight will not only help the Air Force better evaluate and understand the vehicle's performance characteristics, but this first re-flight is an important step in the program. OTV-1 launched in April 2010 and spent 224 days in orbit before going through the refurbishment process prior to being prepped for this mission, he said.
"This mission will incorporate the lessons learned during the refurbishment process on OTV-1," said Lieutenant Colonel McIntyre. "As the X-37B program is examining the affordability and reusability of space vehicles, validation through testing is vital to the process. We are excited to see how this vehicle performs on a second flight."
"The X-37B OTV is designed for an on-orbit duration of approximately 9 months," said Lieutenant Colonel McIntyre. "As with previous missions, actual duration will depend on the execution of test objectives, on-orbit vehicle performance, and conditions at the landing site."
The X-37B Orbital Test Vehicle is led by the Air Force Rapid Capabilities Office, and is designed to demonstrate reusable spacecraft technologies for America's future in space and operating experiments which can be returned to, and examined, on Earth. Technologies being tested in the program include advanced guidance, navigation and control, thermal protection systems, avionics, high temperature structures and seals, conformal reusable insulation, lightweight electromechanical flight systems, and autonomous orbital flight, reentry and landing.
Officials anticipate multiple missions will be required to satisfy the test program objectives, but the exact number of missions has not been determined.