Tech

August 15, 2012

Unmanned US military hypersonic craft failed

staff

An unmanned experimental aircraft failed during an attempt to fly at six times the speed of sound in the latest setback for hypersonic flight.

The X-51A Waverider was designed to reach Mach 6, or 3,600 mph, after being dropped by a B-52 bomber off the Southern California coast Aug. 14. Engineers hoped it would sustain its top speed for five minutes, twice as long as an X-51A has gone before.

But the Air Force said Aug. 15 that a faulty control fin prevented it from starting its exotic scramjet engine and it was lost.

“It is unfortunate that a problem with this subsystem caused a termination before we could light the scramjet engine,” Charlie Brink of the Air Force Research Laboratory at the Wright-Patterson Air Force Base in Ohio, said in a statement.

The Waverider successfully detached from the B-52 and fired the rocket booster as planned. Then its scramjet engine was supposed to take over as it attempted to climb to Mach 6. But that never happened. Fifteen seconds after separating from the rocket booster, the Waverider lost control, preventing a test of the scramjet engine.

“All our data showed we had created the right conditions for engine ignition and we were very hopeful to meet our test objectives,” Brink said.

The Pentagon has been testing hypersonic technologies in hopes of delivering strikes around the globe within minutes.

It was the latest failure for the Waverider program. A test flight last year ended prematurely with an X-15A trying to restart its engine until it plunged into the Pacific Ocean.

During the first flight of an X-51A in 2010, it reached near five times the speed of sound for three minutes.

There’s only one X-51A vehicle left. The Air Force has not decided whether it will fly. AP

 




All of this week's top headlines to your email every Friday.


 
 

 

Headlines April 21, 2014

News: Former Ranger breaks silence on Pat Tillman death: I may have killed him - Almost 10 years after the friendly fire death of former NFL star turned Army Ranger Pat Tillman, a fellow ranger admits that he may have been the one who fired the fatal shot.   Business: Ship study should favor existing designs -...
 
 

News Briefs April 21, 2014

Navy OKs changes for submariners’ sleep schedules The U.S. Navy has endorsed changes to submarine sailors’ schedules based on research into sleep patterns by a military laboratory in Connecticut. With no sunlight to set day apart from night on a submarine, the Navy for decades has staggered sailors’ working hours on schedules with little resemblance...
 
 

NASA cargo launches to space station aboard SpaceX resupply mission

Nearly 2.5 tons of NASA science investigations and cargo are on the way to the International Space Station aboard SpaceX’s Dragon spacecraft. The spacecraft launched atop a Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Air Force Station in Florida at 3:25 p.m., EDT, April 18. The mission is the company’s third...
 

 

Second series of CASIS-sponsored research payloads launch to ISS

The Center for the Advancement of Science in Space is proud to announce several sponsored research payloads have launched to the International Space Station onboard the Space Exploration Technology Corporation’s Dragon cargo capsule. This marks the second series of investigations headed to the station that are sponsored by CASIS, the nonprofit responsible for managing research...
 
 

Boeing to give California workers $47 million in back pay

PALMDALE, Calif. – Boeing will pay $47 million to hundreds of current and former Southern California employees who are owed back pay and benefits, a union announced April 18. An arbitrator ruled against the aerospace giant in January and laid down guidelines for the payments and interest, but it took months to cull through records...
 
 

NASA selects commercial crew program manager

NASA has selected Kathy Lueders as program manager for the agency’s Commercial Crew Program. Lueders, who has served as acting program manager since October 2013, will help keep the nation’s space program on course to launch astronauts from American soil by 2017 aboard spacecraft built by American companies. “This is a particularly critical time for...
 




0 Comments


Be the first to comment!


Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>