Skin-peeling speed doomed hypersonic glider, U.S. says
April 23rd, 2012
12:06 AM ET

Skin-peeling speed doomed hypersonic glider, U.S. says

By Larry Shaughnessy

A test flight of an aircraft designed to whip around the world at Mach 20 failed when the high speeds peeled the skin off the unmanned plane, Pentagon researchers conclude in a long-awaited report.

For nine minutes in August, the Defense Advanced Research Projects Agency flew its Hypersonic Technology Vehicle at speeds reaching 20 times the speed of sound - fast enough to fly from New York to Los Angeles in less than 12 minutes. But then, something went wrong, and DARPA is finally explaining what happened.

"The most probable cause of the HTV-2 Flight 2 premature flight termination was unexpected aeroshell degradation," the research group explained in a new statement on the test flight.

Translation: The unmanned glider was streaking through the atmosphere when its outer skin started to rip off the airframe.

DARPA knew friction from the glider passing through the air so fast would cause it to heat up. It also expected "a gradual wearing away of the vehicle's skin as it reached stress tolerance limits," based on ground tests.

"However, larger-than-anticipated portions of the vehicle's skin peeled from the aerostructure," the statement said. "The resulting gaps created strong, impulsive shock waves around the vehicle as it traveled nearly 13,000 miles per hour, causing the vehicle to roll abruptly."

When that "anomaly" occurred, a safety computer slowed the glider down and it splashed down in the Pacific Ocean, where it's now probably an artificial reef with a moon roof.

The goal of the project is to create an aircraft that can fly anywhere in the world in under an hour to strike a target. The test plane was launched by a Minotaur IV rocket from Vandenberg Air Force Base in California, then separated from the booster and re-entered the atmosphere over the Pacific.

At Mach 20, friction from the surrounding air subjects the vehicle to temperatures of more than 3,500 degrees Fahrenheit (1,925 C).

DARPA said a group of independent experts decided they couldn't have predicted the problem. "The data from second flight revealed that extrapolating from known flight regimes and relying solely on advanced thermal modeling and ground testing could not successfully predict the harsh realities of Mach 20 atmospheric flight," the agency said.

A 2010 test also ended with the craft plunging into the Pacific. In spite of the problems, DARPA said it did learn a lot from the August test.

"We successfully incorporated aerodynamic knowledge gained from the first flight into the second flight," Maj. Chris Schultz, the program manager, said. And future flights will incorporate what was learned in the second test, he said.

Post by:
Filed under: DARPA
soundoff (1,242 Responses)
  1. fiberglass repair shop near me

    I would like to thank you for the efforts you've put in penning this blog. I really hope to see the same high-grade content by you in the future as well. In truth, your creative writing abilities has inspired me to get my very own blog now 😉

    http://www.le-juste-prix.com/__media__/js/netsoltrademark.php?d=ocrvcenter.org

    June 12, 2021 at 8:58 am | Reply
  2. Sprinter Van Service Near Me

    http://www.triwa.com.au/Redirect.aspx?destination=https://campervanrepairshop.com

    June 12, 2021 at 7:38 am | Reply
  3. Dodge Sprinter Repair Near Me

    http://loveboy.com/__media__/js/netsoltrademark.php?d=sprintervanrepairshop.com/

    June 12, 2021 at 7:36 am | Reply
  4. Rv Repair Shop Near Me

    You're so cool! I do not think I have read something like this before. So great to find another person with unique thoughts on this subject. Seriously.. many thanks for starting this up. This web site is one thing that is required on the internet, someone with a bit of originality!

    http://www.centrodeempleos.com/__media__/js/netsoltrademark.php?d=fleetservicerepairshop.com/

    June 12, 2021 at 6:56 am | Reply
  5. RV Collision Repair Los Angeles

    http://www.questionsforliving.net/__media__/js/netsoltrademark.php?d=www.ocrv.vip/

    June 12, 2021 at 6:56 am | Reply
  6. fabrication near me

    You ought to be a part of a contest for one of the best websites online. I most certainly will highly recommend this site!

    http://www.antos.com/__media__/js/netsoltrademark.php?d=ocrvcenter.org

    June 12, 2021 at 6:28 am | Reply
  7. horse trailer repair

    http://thenextthing.com/__media__/js/netsoltrademark.php?d=ocrvmotorsports.org

    June 12, 2021 at 1:22 am | Reply
  8. Van Frame Repair

    Iím impressed, I have to admit. Seldom do I encounter a blog thatís both educative and interesting, and without a doubt, you have hit the nail on the head. The problem is an issue that not enough men and women are speaking intelligently about. Now i'm very happy I came across this in my search for something regarding this.

    http://biz.timesfreepress.com/__media__/js/netsoltrademark.php?d=campervanrepairshop.com

    June 12, 2021 at 12:59 am | Reply
  9. Mercedes Sprinter Repair Shops Near Me

    Pretty! This was an incredibly wonderful article. Thanks for providing this information.

    http://www.ztjysp99.com/link.php?url=https://www.fleetservicesorangecounty.com/

    June 11, 2021 at 11:41 pm | Reply
  10. Touring Van Repair

    http://tk-80.com/__media__/js/netsoltrademark.php?d=sprintervanrepairnearme.com/

    June 11, 2021 at 11:24 pm | Reply
  11. RV Couches Near Me

    I must thank you for the efforts you have put in writing this blog. I'm hoping to view the same high-grade blog posts by you in the future as well. In truth, your creative writing abilities has encouraged me to get my own blog now 😉

    http://anneparks.biz/__media__/js/netsoltrademark.php?d=ocrv.xyz/

    June 11, 2021 at 11:24 pm | Reply
  12. certified rv repair

    Good day! I could have sworn Iíve been to your blog before but after browsing through a few of the articles I realized itís new to me. Anyways, Iím definitely delighted I came across it and Iíll be bookmarking it and checking back often!

    http://sports-ranking.com/search/rank.cgi?mode=link&id=7&url=ocrvcenter.info

    June 11, 2021 at 10:52 pm | Reply
  13. Closest RV Repair Shop

    Pretty! This was an extremely wonderful article. Thanks for providing this information.

    http://www.bookmailclub.com/x/modules/wordpress/wp-ktai.php?view=redir&url=https://www.campervanrepairshop.com

    June 11, 2021 at 9:47 pm | Reply
  14. Gmc Safari Van Repair

    Oh my goodness! Impressive article dude! Many thanks, However I am going through difficulties with your RSS. I donít understand the reason why I can't join it. Is there anyone else having the same RSS problems? Anyone that knows the answer will you kindly respond? Thanx!!

    http://sunnltd.co.uk/regulations?url=https://www.fleetservicesocrv.com

    June 11, 2021 at 7:54 pm | Reply
  15. RV Wraps Los Angeles

    I really like reading a post that will make men and women think. Also, thank you for permitting me to comment!

    http://ww3.brasil66.com/__media__/js/netsoltrademark.php?d=ocrvpaintandservice.com

    June 11, 2021 at 7:48 pm | Reply
  16. Sprinter Van Frame Repair

    Very good post. I certainly love this website. Stick with it!

    http://b0a.glenbrookfire.com/__media__/js/netsoltrademark.php?d=commercialrepairshop.com

    June 11, 2021 at 7:48 pm | Reply
  17. rv collision repair near me

    I have to thank you for the efforts you've put in penning this site. I'm hoping to see the same high-grade content by you later on as well. In fact, your creative writing abilities has motivated me to get my own, personal website now 😉

    http://qchome.us/__media__/js/netsoltrademark.php?d=ocrvexperts.com/

    June 11, 2021 at 5:51 pm | Reply
  18. mcd shades troubleshooting

    http://www.gloryenergy.com/__media__/js/netsoltrademark.php?d=ocrv.store

    June 11, 2021 at 3:33 pm | Reply
  19. near me

    cardiologist

    June 11, 2021 at 3:25 pm | Reply
  20. Tanya Biedenbender

    http://www.bshare.cn/share?url=https://eduardow74q4.boyblogguide.com/4009221/little-known-facts-about-assisted-living-palm-desert

    June 11, 2021 at 12:35 pm | Reply
  21. Francesco Glas

    https://tieba.baidu.com/mo/q/checkurl?url=https://devinl71p9.imblogs.net/50163671/the-best-side-of-seo-marketing-companies

    June 11, 2021 at 11:28 am | Reply
  22. Fredrick Elam

    http://archerc96u5.blogminds.com/a-simple-key-for-rv-body-shop-unveiled-12699570

    June 11, 2021 at 11:18 am | Reply
  23. Cristobal Gibb

    https://tieba.baidu.com/mo/q/checkurl?url=https://deank80p9.blogzet.com/importance-of-appointed-date-productive-day-in-restructuring-15676733

    June 11, 2021 at 9:05 am | Reply
  24. Kendrick Mcculley

    You are so awesome! I don't believe I've truly read a single thing like this before. So good to discover another person with unique thoughts on this topic. Really.. thank you for starting this up. This web site is one thing that's needed on the internet, someone with some originality!

    June 11, 2021 at 9:05 am | Reply
  25. Dan Viale

    I blog frequently and I seriously thank you for your content. The article has really peaked my interest. I will book mark your site and keep checking for new information about once a week. I opted in for your RSS feed as well.

    http://damienf60s1.amoblog.com/top-guidelines-of-local-marketing-services-22377057

    June 11, 2021 at 8:55 am | Reply
  26. rv repair shops

    Aw, this was an incredibly good post. Spending some time and actual effort to produce a top notch articleÖ but what can I sayÖ I hesitate a lot and don't manage to get nearly anything done.

    https://doterra.myvoffice.com/Application/index.cfm?&EnrollerID=1&Theme=Default&ReturnUrl=www.jenangfoods.blogspot.com/2021/02/flooring-repair-specialist-near-me.html

    June 11, 2021 at 8:48 am | Reply
  27. rv repair shop

    https://sso.iiaba.net/login.aspx?a=wa&r=https://mentol.info/remodel-kitchen-near-me.html

    June 11, 2021 at 5:47 am | Reply
  28. Darline Condren

    Hi there! I simply want to give you a huge thumbs up for your excellent information you've got here on this post. I'll be returning to your blog for more soon.

    http://finnh69m8.free-blogz.com/47486437/everything-about-rv-body-shop

    June 11, 2021 at 4:01 am | Reply
  29. Corrie Stamnos

    Iím amazed, I must say. Rarely do I come across a blog thatís equally educative and interesting, and without a doubt, you've hit the nail on the head. The issue is something too few folks are speaking intelligently about. I am very happy that I found this in my hunt for something regarding this.

    https://bitly.com/a/warning?hash=3nUs1YL&url=https://beaui17w5.dreamyblogs.com/4707328/not-known-facts-about-repair-shop

    June 11, 2021 at 1:53 am | Reply
  30. Pricilla Hortin

    Your style is so unique in comparison to other people I've read stuff from. I appreciate you for posting when you have the opportunity, Guess I'll just book mark this site.

    http://sergioq03v1.blogs-service.com/31186336/rumored-buzz-on-lawyers-near-me

    June 11, 2021 at 1:35 am | Reply
  31. rv repair shops near me

    http://maps.google.co.ls/url?q=https://autoseobacklinks.com/search/rv-storage-near-me/

    June 10, 2021 at 11:33 pm | Reply
  32. Carline Kakos

    Having read this I thought it was rather informative. I appreciate you finding the time and effort to put this information together. I once again find myself personally spending a significant amount of time both reading and commenting. But so what, it was still worth it!

    http://help.dedecms.com/plus/player/index.php?url=https://paxtoni83b5.blogerus.com/24282183/repair-shop-fundamentals-explained

    June 10, 2021 at 10:16 pm | Reply
  33. Wilfred Giandelone

    http://help.dedecms.com/plus/player/index.php?url=https://alexisj82x3.blog-a-story.com/5622895/everything-about-security-companies

    June 10, 2021 at 10:16 pm | Reply
  34. Leonie Rehak

    https://kylerq41h0.theblogfairy.com/4396428/value-of-appointed-date-powerful-day-in-restructuring

    June 10, 2021 at 8:37 pm | Reply
  35. rv repair shop

    https://www.google.nr/url?q=http://ilhamhafizah.blogspot.com/2021/01/17-top-pictures-coin-master-near-me.html/

    June 10, 2021 at 8:26 pm | Reply
  36. Leonida Tojo

    http://andersonc61x4.blogginaway.com/5213168/time-for-kitchen-reworking-five-indicators-that-teach-you-it-is-time-to-remodel

    June 10, 2021 at 6:12 pm | Reply
  37. Willie Leysath

    This site truly has all the info I wanted about this subject and didnít know who to ask.

    June 10, 2021 at 2:58 pm | Reply
  38. Raymundo Leidy

    An outstanding share! I've just forwarded this onto a co-worker who was conducting a little research on this. And he actually bought me dinner because I found it for him... lol. So let me reword this.... Thank YOU for the meal!! But yeah, thanks for spending some time to discuss this matter here on your site.

    https://www.bing.com/news/apiclick.aspx?ref=FexRss&aid=&url=https://connerj70n8.articlesblogger.com/24139034/sprinter-van-repair-near-me-options

    June 10, 2021 at 2:58 pm | Reply
  39. rv repair service near me

    Your style is unique in comparison to other people I've read stuff from. I appreciate you for posting when you've got the opportunity, Guess I'll just book mark this web site.

    http://ssomgmt.ascd.org/profile/createsso/createsso.aspx?returnurl=http://restauration-voiture.com/gallery/john-classic-gallery/john-filliard-carrosserie-photo-reportage-annecy-geneve-8/

    June 10, 2021 at 2:10 pm | Reply
  40. Lino Badal

    http://marcoi82y4.myparisblog.com/4932492/time-for-kitchen-area-remodeling-5-symptoms-that-tell-you-about-it-s-time-to-remodel

    June 10, 2021 at 1:14 pm | Reply
  41. rv repair shops near me

    I'm very pleased to discover this website. I wanted to thank you for ones time for this particularly wonderful read!! I definitely really liked every bit of it and I have you book-marked to see new stuff on your web site.

    https://www.girisimhaber.com/redirect.aspx?url=https://noticiasdepolonia.com/18-rv-awning-repair-near-me-gif

    June 10, 2021 at 11:06 am | Reply
  42. Gustavo Hrcka

    https://www.bing.com/news/apiclick.aspx?ref=FexRss&aid=&url=https://finnk29b8.onesmablog.com/The-Definitive-Guide-to-Social-Media-Marketing-Experts-38149221

    June 10, 2021 at 10:54 am | Reply
  43. Cleotilde Freligh

    A fascinating discussion is worth comment. There's no doubt that that you need to write more about this subject, it might not be a taboo matter but typically people do not talk about such topics. To the next! Best wishes!!

    https://finnm82v2.bloguerosa.com/4083979/5-easy-facts-about-seo-marketing-consultant-described

    June 10, 2021 at 10:49 am | Reply
  44. Louie Ricaud

    https://sethp04b4.laowaiblog.com/4047475/the-best-side-of-maserati-dealer-near-60106

    June 10, 2021 at 5:51 am | Reply
  45. rv repair shops

    Everyone loves it when folks get together and share opinions. Great blog, continue the good work!

    https://glowing.com/external/link?next_url=https://www.dallas8z4x0.tkzblog.com/3492035/the-greatest-guide-to-rv-repairs-near-me

    June 10, 2021 at 4:50 am | Reply
  46. Lorean Hallam

    Nice post. I learn something new and challenging on websites I stumbleupon every day. It will always be useful to read content from other writers and use something from their websites.

    https://tieba.baidu.com/mo/q/checkurl?url=https://gunnerc96t5.blogsmine.com/4437840/craft-store-for-dummies

    June 10, 2021 at 4:04 am | Reply
  47. Jeanmarie Skarphol

    https://www.bing.com/news/apiclick.aspx?ref=FexRss&aid=&url=https://cruzz36d4.blogofoto.com/31325641/new-step-by-step-map-for-rv-body-shop

    June 10, 2021 at 3:42 am | Reply
  48. Pok Reta

    http://zionj79m8.bloggosite.com/5874229/5-essential-elements-for-mechanic

    June 10, 2021 at 3:25 am | Reply
  49. rv repair shop near me

    https://connectathon-results.ihe.net/open_is_url.php?url=https://www.linkdofollow.com/site/pantip.com

    June 10, 2021 at 1:43 am | Reply
  50. Delinda Nary

    Spot on with this write-up, I actually believe this web site needs far more attention. Iíll probably be returning to see more, thanks for the info!

    June 10, 2021 at 12:29 am | Reply
  51. Arlie Wittenbrink

    Howdy! I could have sworn Iíve visited this web site before but after going through some of the posts I realized itís new to me. Regardless, Iím certainly pleased I came across it and Iíll be bookmarking it and checking back often!

    June 10, 2021 at 12:29 am | Reply
  52. Armando Ryea

    http://www.bshare.cn/share?url=https://caidene58i6.rimmablog.com/4356458/what-on-earth-is-lifestyle-coaching-and-why-daily-life-coaching-could-possibly-be-for-you

    June 10, 2021 at 12:12 am | Reply
1 2 3 4 5 6 7 8 9 10 11

Leave a Reply to Lrbsreext


 

CNN welcomes a lively and courteous discussion as long as you follow the Rules of Conduct set forth in our Terms of Service. Comments are not pre-screened before they post. You agree that anything you post may be used, along with your name and profile picture, in accordance with our Privacy Policy and the license you have granted pursuant to our Terms of Service.