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.
@natlsecuritycnn on Twitter
http://logmein.net/__media__/js/netsoltrademark.php?d=https://affordableranking.com
buy brimonidine online brimonidine dosage
http://regist.cyut.edu.tw/VC/SwitchView?mobile=False&returnUrl=http://forkliftswildwestlifttrucks.com/bendi-forklift-repair-orange-county-california
Can I just say what a relief to uncover somebody that actually knows what they are discussing online. You actually realize how to bring an issue to light and make it important. A lot more people have to check this out and understand this side of your story. It's surprising you're not more popular since you definitely possess the gift.
http://www.kichink.com/home/issafari?uri=http://www.merzarchitekten.com/component/k2/item/76-zaehl-und-sensortechnik-sch-.html?start=32570
Pretty! This was a really wonderful article. Many thanks for providing this information.
http://pcinhk.com/discuz/uchome/link.php?url=beritarakyat.asia/gempa-53-sr-kembali-guncang-lombok-timur/
I really like it whenever people come together and share opinions. Great site, stick with it!
https://nsuem.ru/bitrix/redirect.php?event1=lib5&event2=&event3=&goto=https://touzart.net/?p=1697
This is a great tip particularly to those new to the blogosphere. Simple but very accurate info… Thanks for sharing this one. A must read article!
https://senwes.co.za/LinkTrack.aspx?i=Sat24LinkAF&url=https://tomspeed.de/index.php?option=com_phocaguestbook&view=phocaguestbook&id=1&Itemid=53&t=20&limitstart=180&el_mcal_month=5&el_mcal_year=2020
cheap viagra free shipping http://loxviagra.com/ does viagra make you bigger
http://www.bigtimesportsohio.com/Redirect.aspx?destination=http://www.ocrvcenter.com/motorhome-roof-repair-near-me
Saved as a favorite, I like your website!
http://www.meetingsandconventions.net/__media__/js/netsoltrademark.php?d=affordableranking.com
cialis black https://cialisee.com/ cialis viagra mail order uk discrete billing
I’m amazed, I have to admit. Rarely do I come across a blog that’s both equally educative and amusing, and let me tell you, you've hit the nail on the head. The problem is something that not enough people are speaking intelligently about. I am very happy I stumbled across this during my hunt for something regarding this.
http://keyscan.cn.edu/AuroraWeb/Account/SwitchView?returnUrl=http://populardirectory.biz/Business/Customer_Service/?p=351
https://teacher.piano.or.jp/redirect_link?ptna_id=100017&url=http://ocrvandtrucks.com/rv-repair-shop-inglewood-california
I like reading through a post that will make men and women think. Also, many thanks for permitting me to comment!
http://dmca.com/Protection/Status.aspx?ID=edc817fd-d796-4c84-abb8-d1cb5b2e3719&refurl=http://www.mexdent.com/shop/lewis-rasp/
http://d-click.alterdata.com.br/u/15028/1120/88002/2068_0/6d5c3/?url=http://ocrv.me/rv-repair-shop-arleta-california
buy cyclosporine cyclomune
tadalafil cost in canada where to buy tadalafil on line tadalafil price walmart cialis without prescription https://tadalafilww.com/ – where to order tadalafil tablets
Your style is so unique in comparison to other people I've read stuff from. Thanks for posting when you have the opportunity, Guess I'll just bookmark this blog.
https://www.anonymz.com/?https://liquidenergy.jp/link/ã‚ãªãŸãŒå¹¸ã›ã«ãªã‚‹ãƒ¡ãƒ¢ãƒªãƒ¼ã‚ªã‚¤ãƒ«ã¨ãƒ‘ワースト/
Good information. Lucky me I found your website by chance (stumbleupon). I have book-marked it for later!
https://www.demo.cloudhostedresources.com/?id=7cde069d28fee9161e9475b01c2cf8cf&fullscreen=1&task=get&url=https://ocrvcenter.com/passenger-bus-collision-repair-shop-near-me
I must thank you for the efforts you've put in penning this site. I'm hoping to check out the same high-grade content by you later on as well. In fact, your creative writing abilities has inspired me to get my very own website now 😉
http://oldtmt.vedomosti.ru/rss/toolbars/closeAd.php?backUrl=http://ocrvshop.com/rv-repair-shop-van-nuys-california
http://d-click.alterdata.com.br/u/15028/1120/88002/2068_0/6d5c3/?url=https://ocrvmotorsports.com/rv-repair-shop-chatsworth-california
https://www.domainsherpa.com/share.php?site=https://ocrv.me/rv-repair-shop-rialto-california
Good article. I definitely appreciate this site. Thanks!
https://www.kanazawa-navi.com/navi/rank.cgi?mode=link&id=725&url=https://ocrvcenter.com/rv-repair-shop-kagel-canyon-california
http://www.php-api.engageya.com/oper/https_redirect.php?url=https://kingfastener.ir/17-huskies-the-lead-for-viewwebsite-instagramtwitterfacebooksnapchatshop-iconprofile-overlay-nike-nfl-jerseys-from-china/
You are so interesting! I do not think I've truly read something like that before. So nice to find somebody with original thoughts on this subject. Seriously.. thank you for starting this up. This website is one thing that's needed on the web, someone with a little originality!
http://i.ipadown.com/click.php?id=169&url=https://ocrvcenter.com/freightliner-collision-repair-shop-near-me
I really like looking through an article that will make people think. Also, thanks for permitting me to comment!
http://partner.pccomponentes.com/servlet/effi.redir?id_compteur=13365084&url=https://ocrvcenter.com/rv-repair-shop-hemet-california/
After I originally left a comment I appear to have clicked on the -Notify me when new comments are added- checkbox and now each time a comment is added I get four emails with the same comment. Is there an easy method you are able to remove me from that service? Thanks!
http://www.gmwebsite.com/web/redirect.asp?url=https://ocrvcenter.com/motorhome-installation-near-me/
http://numishop.walnutinsurance.biz/__media__/js/netsoltrademark.php?d=affordableranking.com
I wanted to thank you for this fantastic read!! I certainly enjoyed every little bit of it. I have got you bookmarked to check out new things you post…
https://www.hammer.x0.to/cgi/search/rank.cgi?mode=link&id=6289&url=https://ocrvcenter.com/rv-repair-shop-baldwin-park-california
Howdy! I just wish to offer you a huge thumbs up for your great information you have here on this post. I am coming back to your blog for more soon.
http://mintax.kz/go.php?http://affordableranking.com
generic cialis with dapoxetine https://ucialisdas.com/ – cialis order free samples for cialis
http://dresscircle-net.com/suteki/rank.cgi?mode=link&id=633&url=ocrvcenter.com/rv-repair-shop-norwalk-california/
http://yamato4u.cside.com/ys4/rank.cgi?mode=link&id=1809&url=https://ocrvandtrucks.com/rv-repair-shop-laguna-beach-california
http://bd.jinti.com/Return/go.asp?mail_id=20170911jd&url=https://ocrvexperts.com/rv-repair-shop-san-bernardino-california
https://track.effiliation.com/servlet/effi.redir?id_compteur=22157233&effi_id=leparfroid244&url=https://theocrv.com/rv-repair-shop-twentynine-palms-california
An impressive share! I've just forwarded this onto a co-worker who was conducting a little research on this. And he in fact ordered me dinner because I discovered it for him... lol. So allow me to reword this.... Thank YOU for the meal!! But yeah, thanks for spending some time to discuss this matter here on your web site.
http://www.hawavalves.de/__media__/js/netsoltrademark.php?d=affordableranking.com
/
https://www.suzuki.saikyou.biz/rank.cgi?mode=link&id=5&url=https://ocrvcenter.com/rv-interior-remodeling-near-me
cialis online without prescription http://ucialisdas.com/ cialis usa
quinine https://chloroquineorigin.com/ – chloroquine autophagy buy chloroquine phosphate uk aralen https://chloroquineorigin.com/
jack in the box viagra commercial 2010 http://llviagra.com/ wie wirkt viagra besser
Zudena https://xlnpharmacy.com/ economy pharmacy
I was able to find good info from your blog posts.
http://sso.aoa.org/Authenticate.aspx?Return=http://ocrv.fun/rv-repair-shop-yorba-linda-california
https://www.oltv.cz/redirect.php?url=https://www.ocrvcenter.com/rv-repair-shop-monrovia-california
There's definately a great deal to find out about this issue. I like all of the points you've made.
http://www.mnogosearch.org/redirect.html?https://ocrvcenter.com/rv-repair-shop-sylmar-california/
Way cool! Some very valid points! I appreciate you writing this write-up and the rest of the website is really good.
/
http://www.response-o-matic.com/thank_you.php?u=http://ocrv.art/rv-repair-shop-malibu-california
Oh my goodness! Awesome article dude! Many thanks, However I am going through issues with your RSS. I don’t know why I can't subscribe to it. Is there anybody else getting similar RSS problems? Anybody who knows the solution can you kindly respond? Thanx!!
http://www.capnordic.dk/redirect.asp?url=http://www.eventsetservices.co.uk/bs-design/food-trays-for-schools/
https://www.syuriya.com/ys4/rank.cgi?mode=link&id=415&url=https://www.ocrvcenter.com/motorhome-roof-repair-near-me/
I quite like reading through an article that will make men and women think. Also, thanks for allowing for me to comment!
https://www.deairank.mistypark.com/02/out.cgi?id=ami26&url=http://www.affordableranking.com/
Hi, I do believe this is a great site. I stumbledupon it 😉 I may return once again since I bookmarked it. Money and freedom is the greatest way to change, may you be rich and continue to help others.
http://mias.skoda-avto.ru/bitrix/redirect.php?event1=news_out&event2=&goto=https://clementmaotakacs.com/my-daughter-had-read-the-book-it-starts-with-food-discover/
Greetings! Very helpful advice in this particular post! It's the little changes that produce the largest changes. Thanks a lot for sharing!
https://email.ratemyagent.com.au/Email/RedirectToURL?url=http://ocrvluxurycoaches.com/rv-repair-shop-granada-hills-california
I needed to thank you for this fantastic read!! I definitely enjoyed every bit of it. I've got you book-marked to look at new stuff you post…
http://egov2.miamigov.com/Office_of_Auditor_General/admin/Portal/LinkClick.aspx?tabid=1&table=Announcements&field=ItemID&id=98&link=http://ocrv.org/rv-repair-shop-lomita-california
http://eforce.todayir.com/en/fileview.php?file=https://ocrvcenter.com/shuttle-truck-collision-repair-shop-near-me/
Hello! I could have sworn I’ve visited your blog before but after browsing through many of the articles I realized it’s new to me. Regardless, I’m definitely pleased I discovered it and I’ll be bookmarking it and checking back often!
http://mailer.dt.co.kr/bin/checker?mode=5&module=11&mailidx=4275&dmidx=0&emidx=0&service=0&etime=20080227100001&seqidx=18963&objidx=16&url=https://fleetservicesorangecounty.com/sprinter-van-upgrades-shop-near-me/
https://www.payrollservers.us/sc/cookie.asp?sitealias=25925711&redirect=http://sprintervanrepairshop.com/sprinter-van-maintenance-shop-near-me
http://opensesame.wellymulia.zaxaa.com/b/66851136?s=1&redir=http://commercialvanrepairshop.com/semi-truck-repair-shop-near-me
Hi, I do believe this is a great site. I stumbledupon it 😉 I am going to return once again since i have book-marked it. Money and freedom is the greatest way to change, may you be rich and continue to guide others.
https://espqa.memorialhermann.org/url?q=https://fleetservicesocrv.com/sprinter-van-collision-repair-shop-near-me
https://www.bad.org.uk/for-the-public/patient-information-leaflets/androgenetic-alopecia/?showmore=1&returnlink=https://ocrv.info/rv-repair-shop-costa-mesa-california
The next time I read a blog, I hope that it doesn't disappoint me as much as this one. I mean, Yes, it was my choice to read, nonetheless I genuinely believed you'd have something interesting to talk about. All I hear is a bunch of complaining about something you could possibly fix if you weren't too busy looking for attention.
http://czech-guide.aspone.cz/language.aspx?culture=cs-CZ&ReturnUrl=http://ocrvcenter.org/rv-repair-shop-sunland-tujunga-california
I’m impressed, I must say. Rarely do I encounter a blog that’s both educative and engaging, and without a doubt, you've hit the nail on the head. The problem is an issue that too few people are speaking intelligently about. I am very happy that I stumbled across this in my hunt for something regarding this.
https://aslplayerservices.org/__media__/js/netsoltrademark.php?d=ocrvcenter.com/rv-repair-shop-calabasas-highlands-california
http://balder.messe.de/werbung/www/delivery/ck.php?ct=1&oaparams=2__bannerid=1512__zoneid=697__cb=18dc65fbad__oadest=https://theocrv.com/rv-repair-shop-riverside-california
Everything is very open with a really clear clarification of the issues. It was truly informative. Your site is very helpful. Many thanks for sharing!
https://www.dvnlp.de/profile/gruppe/redirect/5?url=ocrvcenter.com/rv-plumbing-repair-near-me
https://app.kartra.com/redirect_to/?asset=url&id=http://ocrvcenter.mobi/rv-repair-shop-irvine-california
After exploring a number of the blog posts on your website, I honestly appreciate your technique of blogging. I bookmarked it to my bookmark site list and will be checking back soon. Please check out my web site too and tell me how you feel.
http://imaginingourselves.globalfundforwomen.org/pb/External.aspx?url=http://ocrvcenter.com/national-general-rv-collision-repair-shop-near-me
cialis and viagra http://rcialisgl.com/ buy cialis via pay pal
Wonderful post! We will be linking to this great article on our site. Keep up the great writing.
https://sso.aoa.org/Authenticate.aspx?Return=https://ocrvcenter.com/rv-repair-shop-hermosa-beach-california
Having read this I thought it was rather enlightening. I appreciate you spending some time and energy to put this short article together. I once again find myself spending way too much time both reading and posting comments. But so what, it was still worth it!
http://imaginingourselves.globalfundforwomen.org/pb/External.aspx?url=https://ocrvcenter.net/rv-repair-shop-agua-dulce-california
https://advtest.exibart.com/adv/adv.php?id_banner=7201&link=https://internetmarketingoregon.com/
I enjoy reading a post that can make people think. Also, thank you for allowing for me to comment!
http://citidex.sfgov.org/cgi-bin/sunindex/getData.cgi?docColor=deptsonly&dispRec=yes&contact=TedYamasaki&phone=(415)557-4815&url=ocrvexperts.com/rv-repair-shop-santa-fe-springs-california
There's definately a lot to find out about this issue. I love all the points you have made.
https://www.j-friends.jp/cgi/search/rank.cgi?mode=link&id=8555&url=https://developingprospects.com/
I needed to thank you for this great read!! I certainly loved every little bit of it. I've got you bookmarked to look at new stuff you post…
http://php-api.engageya.com/oper/https_redirect.php?url=http://spokanevalleymarketing.com
buy brand cialis https://rcialisgl.com/ cialis paypale
You need to take part in a contest for one of the highest quality sites online. I am going to recommend this website!
https://service.affilicon.net/compatibility/hop?hop=dyn&desturl=https://developingprospects.com
Excellent post! We will be linking to this great article on our website. Keep up the great writing.
http://drmshk.com/link.php?url=https://hiddenapples.com/
viagra vs cialis vs levitra http://jokviagra.com/ – best viagra pills viagra 50mg price
is viagra otc http://loxviagra.com/ – viagra over the counter walmart how does viagra work
Nice post. I learn something totally new and challenging on websites I stumbleupon everyday. It's always interesting to read through content from other writers and practice something from their sites.
https://www.nilaima.com/link.php?url=https://nearmyspot.com/
online pharmacy ed http://xlnpharmacy.com/ canadian pharmacy ltd
Pretty! This has been a really wonderful post. Many thanks for supplying this info.
http://oraung02.iamgold.com/__media__/js/netsoltrademark.php?d=projectdifusion.com/mantenimiento/construction-workers-1715667_1920/
Cipro http://pharmacylo.com/ Atorlip-5
Spot on with this write-up, I absolutely feel this site needs a lot more attention. I’ll probably be returning to see more, thanks for the information!
/
The very next time I read a blog, I hope that it won't fail me just as much as this one. After all, Yes, it was my choice to read, nonetheless I really believed you'd have something interesting to say. All I hear is a bunch of crying about something that you can fix if you weren't too busy searching for attention.
https://beesign.com/webdesign/extern.php?homepage=nevadapwcrentals.com/
Good article. I will be experiencing a few of these issues as well..
https://www.doctor-navi.com/cgi/hospital-search-engine2/rank.cgi?mode=link&id=14979&url=https://sunglasseseyedoctorsoptometristphoenixaz.com/
This site was... how do you say it? Relevant!! Finally I've found something which helped me. Thank you!
http://www.the-mall.org/ys_shop/rank.cgi?mode=link&id=5395&url=https://club-maserati.com/
http://www.dmca.com/Protection/Status.aspx?ID=edc817fd-d796-4c84-abb8-d1cb5b2e3719&refurl=https://sunglasseseyedoctorsoptometristphoenixaz.com/
Good article. I definitely love this website. Stick with it!
http://fotobug.net/home/link.php?url=http://optometristphoenixaz.com
Pretty! This has been a really wonderful article. Thanks for supplying this info.
http://dmca.com/Protection/Status.aspx?ID=edc817fd-d796-4c84-abb8-d1cb5b2e3719&refurl=http://www.club-maserati.com
Howdy! This post couldn’t be written much better! Looking through this article reminds me of my previous roommate! He constantly kept talking about this. I most certainly will send this post to him. Fairly certain he will have a good read. Many thanks for sharing!
https://www.anonymz.com/?https://webdesignpostfalls.com/
Good article. I'm going through a few of these issues as well..
https://analytics.bluekai.com/site/16231?phint=event=click&phint=campaign=BRAND-TAB&phint=platform=search&done=http://juicycalls.com/
https://monitor.ppcprotect.com/v1.0/template?kw=&mt=&nw=u&cpn=1657368844&devi=c&devm=&locp=2840&loci=2840&pl=&cr=319296920520&adp=&ruid=4616355957838780104&sadt=&smid=355405&spch=online&spid=000-14649-001&spco=US&spla=en&sppid=574603068213&ssco=&url=https://sunglasseseyedoctorsoptometristphoenixaz.com
https://ranking.8ne.jp/11/out.cgi?id=seons32&url=https://arizonasvision.com
Everything is very open with a really clear explanation of the challenges. It was really informative. Your site is very useful. Many thanks for sharing!
https://dereferer.org/?https://club-maserati.com/
I seriously love your blog.. Great colors & theme. Did you develop this web site yourself? Please reply back as I’m planning to create my very own site and would love to know where you got this from or exactly what the theme is named. Thank you!
http://local.katc.com/__media__/js/netsoltrademark.php?d=bettersightovernight.com/
Oh my goodness! Awesome article dude! Thank you so much, However I am having problems with your RSS. I don’t understand why I can't subscribe to it. Is there anyone else getting the same RSS issues? Anybody who knows the solution can you kindly respond? Thanks!!
https://www.bbs.cfish.idv.tw/link.php?url=https://www.bonus-books.com
http://ossokolje.edu.ba/gbook/go.php?url=https://maseratis.net
Howdy! This post could not be written much better! Looking at this article reminds me of my previous roommate! He continually kept talking about this. I will send this information to him. Fairly certain he's going to have a great read. Many thanks for sharing!
https://www.kronenberg.org/download.php?download=http://sanmarinoroof.com&filename=rpn-calculator_0.9.0.wdgt.zip&project=RPN-Calculator
Hi, I do think this is an excellent site. I stumbledupon it 😉 I am going to revisit yet again since i have book-marked it. Money and freedom is the best way to change, may you be rich and continue to guide others.
http://vpdacha.ru/_snippet/redirector.php?url=https://sanmarinoroof.com/
http://old.daliedu.cn/url.asp?url=https://maseratis.net
Hello! I simply wish to give you a big thumbs up for the great information you have here on this post. I am returning to your web site for more soon.
https://www.tamiroom.com/bbs/cafe.php?mode=node&id=936&page=1&home=https://www.eyedoctorphoenixaz.com/