Mysterious X-37B Space Plane Explained: Boeing's New Video
A new video lays out the basics of what the Air Force's robotic X-37B space plane is doing on its latest mystery mission, which lifted off last week.
Most aspects of X-37B missions are classified, so the new video — which was produced by Boeing, the vehicle's maker — doesn't go into detail. But it does give a sense of why the Air Force values the reusable space plane so highly.
"The X-37B testbed platform is unique because we can tailor our missions to specific user needs and return experiments back for post-flight inspection," Ken Torok, director of experimental systems at Boeing, says in the video.
The video was released last Thursday (Sept. 7), the day that a SpaceX Falcon 9 rocket launched an X-37B on the program’s Orbital Test Vehicle (OTV-5) mission.
Flights of the craft in the past have repeatedly broken the program's own duration record.
The first OTV mission began April 22, 2010, and concluded on Dec. 3, 2010, after 224 days in orbit. OTV-2 began March 5, 2011, and concluded on June 16, 2012, after 468 days on orbit.
The OTV-3 mission wrapped up nearly 675 days in orbit when it landed on Oct. 17, 2014.
On May 7, 2017, OTV-4 landed at NASA’s Kennedy Space Center Shuttle Landing Facility — a first for the program, as all previous missions ended with a tarmac touchdown at Vandenberg Air Force Base in California. The X-37B conducted on-orbit experiments for 718 days during OTV-4, extending the total number of days spent on orbit for the OTV program to 2,085 days.
Built by Boeing
The Air Force is known to own two X-37B vehicles, which constitute the space plane "fleet."
Appearing like a miniature version of NASA’s now-retired space shuttle orbiter, the reusable military space plane is 29 feet (8.8 meters) long and 9.6 feet (2.9 m) tall, with a wingspan of nearly 15 feet (4.6 m).
The space drone has a payload bay about the size of a pickup truck bed that can be outfitted with a robotic arm. The X-37B has a launch weight of 11,000 lbs. (4,990 kilograms) and is powered on orbit by a solar cell-laden array.
To view the just-released video, go to: https://www.youtube.com/watch?v=u-7VNf7DCY8
Secretive X-37B Military Space Plane Wings Past 200 Days in Orbit
The U.S. Air Force's X-37B space plane has winged past 200 days in orbit on its latest clandestine mission.
That mission, known as Orbital Test Vehicle-5 (OTV-5), began Sept. 7, 2017, when the robotic spacecraft launched atop a SpaceX Falcon 9 booster from NASA's Kennedy Space Center (KSC) in Florida.
According to Air Force officials, one payload flying on OTV-5 is the Advanced Structurally Embedded Thermal Spreader, or ASETS-11, of the U.S. Air Force Research Laboratory (AFRL). This cargo is testing experimental electronics and oscillating heat pipes for long durations in the space environment.
"The X-37B has been and remains a technology demonstrator," said Joan Johnson-Freese, a professor in the National Security Affairs Department at the Naval War College in Newport, Rhode Island.
"Given that most space technology is dual-use, with the ever-increasing sway toward warfare in space, it's likely that the more militaristic uses of the space plane will be pursued more vigorously, and likely openly given the [presidential] administration's proclivity toward chest thumping," she told Space.com, expressing her personal view.
How long the unpiloted, reusable craft will stay aloft is not known, but experts have said it's likely to land at KSC's Shuttle Landing Facility, as the OTV-4 mission did back on May 7, 2017. That was a first for the program, as all prior missions had ended with a tarmac touchdown at Vandenberg Air Force Base in California.
Each X-37B mission has set a new flight-duration record for the program.
OTV-1 began April 22, 2010, and concluded on Dec. 3, 2010, after 224 days in orbit.
The second OTV mission began March 5, 2011, and concluded on June 16, 2012, after 468 days on orbit.
OTV-3 chalked up nearly 675 days in orbit before finally coming down on Oct. 17, 2014.
And OTV-4 conducted on-orbit experiments for 718 days during its mission, extending the total number of days spent in space for the OTV program to 2,085 days.
The Air Force Rapid Capabilities Office manages the X-37B project, using it to perform risk-reduction, experimentation and concept-of-operations development for reusable space-vehicle technologies.
The space drone has a payload bay about the size of a pickup-truck bed, which can be outfitted with a robotic arm. X-37B has a launch weight of 11,000 lbs. (4,990 kilograms) and is powered on orbit by gallium-arsenide solar cells with lithium-ion batteries.
The classified X-37B program "fleet" consists of two known reusable vehicles, both of which were built by Boeing. Looking like a miniature version of NASA's now-retired space shuttle orbiter, the military space plane is 29 feet (8.8 meters) long and 9.6 feet (2.9 m) tall, with a wingspan of nearly 15 feet (4.6 m).
Trail gone cold
The orbital path of the currently flying space plane is a tad puzzling, said Ted Molczan, a Toronto-based satellite analyst.
"There were indications that OTV-5 went to a significantly higher-inclination orbit than previous OTV missions," he told Space.com. "There was too little information to narrowly constrain a search."
Molczan said he assisted in one fruitless search, but it was of the roughly 44-degree-inclination orbit implied by the OTV-5 launch's "Notice to Airmen," the routine report put out to warn any aircraft pilots who may be near the flight path.
"The final orbit may be more like 60 degrees," he said. "If an object is not found within days or a few weeks of launch, then the trail goes cold and discovery depends on a chance sighting."