Keep the shuttle flying: Fwd: Launch Date Set for X-37B Spaceplane’s 4th Flight

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From: "Gary Johnson" <gjohnson144@comcast.net>
Date: April 27, 2015 at 10:03:09 AM CDT
To: "Gary Johnson" <gjohnson144@comcast.net>
Subject: FW: Launch Date Set for X-37B Spaceplane's 4th Flight

Launch Date Set for X-37B Spaceplane's 4th Flight
by Mike Gruss — April 24, 2015
An X-37B undergoes inspection after landing at Vandenberg Air Force Base, California. Credit: USAF
WASHINGTON — The U.S. Air Force says it will launch an unmanned X-37B spaceplane for a fourth mission no earlier than May 20.
Built by Boeing Space & Intelligence Systems of El Segundo, California, the X-37Bs are reusable unmanned orbital maneuvering vehicles that launch atop an expendable rocket and return to Earth much like NASA's now-retired space shuttle and glides in for a runway landing.
The Air Force declined to say which of the two X-37B spaceplanes the service will use for the mission.
"The program selects the orbital test vehicle for each activity based upon the experiment objectives," Air Force spokesman Capt. Chris Hoyler said.
The spaceplane is the primary payload for the AFSPC-5 mission and will launch aboard United Launch Alliance's Atlas 5 rocket from Cape Canaveral Air Force Station in Florida. All three previous X-37B missions launched from the Cape and landed at Vandenberg Air Force Base, California.
The Air Force did not say where the upcoming X-37B mission would land, or how long it would remain in orbit. The last X-37B launched into space logged 674 days in orbit before landing last October.
"We are excited about our fourth X-37B mission," Randy Walden, the director of the Air Force's Rapid Capabilities Office, said in an April 24 statement. "With the demonstrated success of the first three missions, we're able to shift our focus from initial checkouts of the vehicle to testing of experimental payloads."
This flight is aimed at evaluating improvements to the spaceplane's performance and will also include an experimental propulsion system developed by the Air Force Research Laboratory and the Air Force Space and Missile Systems Center, the release said.
"We're honored to host these collaborative experiments that will help advance the state-of-the-art for space technology," Walden said.
The Air Force has been tight-lipped about the X-37B program's purpose, only saying the flights are used for "risk reduction, experimentation and concept of operations development for reusable space vehicle technologies."

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Mysterious X-37B Military Space Plane to Fly Again Next Month
by Mike Wall, Space.com Senior Writer | April 24, 2015 06:47pm ET

Artist's illustration of the U.S. Air Force's X-37B space plane in orbit. The mysterious spacecraft is scheduled to launch on its fourth mission on May 20, 2015.
Credit: NASA Marshall Space Flight Center View full size image
The United States Air Force's X-37B space plane will launch on its fourth mystery mission next month.
The unmanned X-37B space plane, which looks like a miniature version of NASA's now-retired space shuttle orbiter, is scheduled to blast off atop a United Launch Alliance Atlas V rocket from Florida's Cape Canaveral Air Force Station on May 20.
"We are excited about our fourth X-37B mission," Randy Walden, director of the Air Force Rapid Capabilities Office, said in a statement. "With the demonstrated success of the first three missions, we're able to shift our focus from initial checkouts of the vehicle to testing of experimental payloads." [See photos of the X-37B's third mission]
The X-37B's payloads and specific activities are classified, so it's unclear exactly what the spacecraft does while zipping around the Earth. But Air Force officials have revealed a few clues about the upcoming mission.
"The Air Force Research Laboratory (AFRL), Space and Missile Systems Center (SMC) and the Air Force Rapid Capabilities Office (AFRCO) are investigating an experimental propulsion system on the X-37B on Mission 4," Capt. Chris Hoyler, an Air Force spokesman, told Space.com via email.
"AFRCO will also host a number of advance materials onboard the X-37B for the National Aeronautics and Space Administration (NASA) to study the durability of various materials in the space environment," Hoyler added.
The Air Force owns two X-37B space planes, both of which were built by Boeing's Phantom Works division. The solar-powered spacecraft are about 29 feet long by 9.5 feet tall (8.8 by 2.9 meters), with a wingspan of 15 feet (4.6 m) and a payload bay the size of a pickup-truck bed. The X-37B launches vertically atop a rocket and lands horizontally on a runway, like the space shuttle did.
One of the two X-37B vehicles flew the program's first and third missions, which were known as OTV-1 and OTV-3, respectively. ("OTV" is short for "Orbital Test Vehicle.") The other spacecraft flew OTV-2. Air Force officials have not revealed which space plane will be going to orbit on the upcoming mission.
OTV-1 launched in April 2010 and landed in December of that year, staying in orbit for 225 days. OTV-2 blasted off in March 2011 and circled Earth for 469 days, coming down in June 2012. OTV-3 launched in December 2012 and stayed aloft for a record-breaking 675 days, finally landing in October 2014.
A recovery team processes the U.S. Air Force's X-37B space plane after the robotic spacecraft's successful landing at Vandenberg Air Force Base in California on Oct. 17, 2014. The touchdown marked the end of the X-37B's third space mission.
Credit: Boeing
View full size image
If Air Force officials know how long OTV-4 is going to last, they're not saying.
"The X-37B is designed for an on-orbit duration of 270 days," Hoyler said. "Longer missions have been demonstrated. As with previous missions, the actual duration will depend on test objectives, on-orbit vehicle performance and conditions at the landing facility."
The secrecy surrounding the X-37B and its payloads has fueled speculation in some quarters that the vehicle could be a space weapon of some sort. But Air Force officials have repeatedly refuted that notion.
"The primary objectives of the X-37B are twofold: reusable spacecraft technologies for America's future in space, and operating experiments which can be returned to, and examined, on Earth," Air Force officials wrote in on online X-37B fact sheet. "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, re-entry and landing."

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