Air Force Launching Secretive X-37B Space Plane in October, Could Land in Florida

The exact launch date of the hush-hush mission hasn't been revealed

Join Our Community of Science Lovers!

The U.S. military's hush-hush robotic X-37B space plane is slated to blast off again next month, Air Force officials say. The mission will test the robotic spacecraft's reusability and may eventually land on the Florida runway once used for NASA space shuttles.

The X-37B space plane's next mission — called Orbital Test Vehicle-3, or OTV-3, because it is the program's third-ever spaceflight — is scheduled to launch aboard an Atlas 5 rocket from Florida's Cape Canaveral Air Force Station (CCAFS) sometime in October.

"Preparations for launch at Cape Canaveral have begun," said Major Tracy Bunko at the Pentagon’s Air Force press desk. "We are on track to launch OTV-3 next month; however, the exact date remains subject to change based on range conditions, weather, etc."

On supporting science journalism

If you're enjoying this article, consider supporting our award-winning journalism by subscribing. By purchasing a subscription you are helping to ensure the future of impactful stories about the discoveries and ideas shaping our world today.

A mysterious mission

As with the X-37B program's two previous spaceflights — OTV-1 and OTV-2 — OTV-3's payload and mission details are classified. But the focus remains on testing vehicle capabilities and proving the utility and cost-effectiveness of a reusable spacecraft, Bunko told SPACE.com. [Photos: The X-37B Space Plane]

Bunko said in an earlier communiqué that this third flight will use the same X-37B spacecraft that flew the first test flight, the OTV-1 mission, back in 2010.

That maiden voyage of the miniature space plane lasted 225 days. It launched into orbit on April 22, 2010, and then landed on Dec. 3 of that year, zooming in on autopilot over the Pacific Ocean and gliding down onto a specially prepared runway at Vandenberg Air Force Base in California.

A different X-37B vehicle made a similar Vandenberg touchdown this past June 16, having stayed in orbit for 469 days on its OTV-2 mission.

The X-37B program is being run by the U.S. Air Force Rapid Capabilities Office. The two space planes — which are 29 feet (8.8 meters) long and 15 feet (4.5 m) wide, with a payload bay about the size of a pickup truck bed — were built by Boeing Government Space Systems.

While they're sparing with details about the X-37B program, Air Force officials say the vehicles enable them to test out how new technologies perform in space.

“One of the most promising aspects of the X-37B is it enables us to examine a payload system or technology in the environment in which it will perform its mission and inspect them when we bring them back to Earth,” Bunko said. “Returning an experiment via the X-37B OTV enables detailed inspection and significantly better learning than can be achieved by remote telemetry alone.”

A new landing site?

While both previous X-37B missions touched down at Vandenberg, the Air Force is considering landing future flights at NASA's Kennedy Space Center in Florida, next door to the Cape Canaveral launch site.

In fact, the Air Force is currently conducting taxi and braking tests as part of an ongoing appraisal. The prospect of a returning the robotic space plane to the KSC landing strip — which was used by NASA's now-retired space shuttle fleet — is seen as a cost-saving measure.

"We are also considering consolidating landing, refurbishment and launch operations at KSC or CCAFS in an effort to save money," Bunko said.

“We are seeking to leverage previous space shuttle investments and are investigating the possibility of using the former shuttle infrastructure for X-37B OTV landing operations," Bunko added. "Those investigations are in an early state, and any specifics will not be known for some time, but could potentially be used as early as for the landing of OTV-3."

Leonard David has been reporting on the space industry for more than five decades. He is a winner of last year's National Space Club Press Award and a past editor-in-chief of the National Space Society's Ad Astra and Space World magazines. He has written for SPACE.com since 1999.

It’s Time to Stand Up for Science

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in that two-century history.

I’ve been a Scientific American subscriber since I was 12 years old, and it helped shape the way I look at the world. SciAm always educates and delights me, and inspires a sense of awe for our vast, beautiful universe. I hope it does that for you, too.

If you subscribe to Scientific American, you help ensure that our coverage is centered on meaningful research and discovery; that we have the resources to report on the decisions that threaten labs across the U.S.; and that we support both budding and working scientists at a time when the value of science itself too often goes unrecognized.

In return, you get essential news, captivating podcasts, brilliant infographics, can't-miss newsletters, must-watch videos, challenging games, and the science world's best writing and reporting. You can even gift someone a subscription.

There has never been a more important time for us to stand up and show why science matters. I hope you’ll support us in that mission.

Thank you,

David M. Ewalt, Editor in Chief, Scientific American