Results 1 to 6 of 6
  1. #1
    Hall-Of-Famer
    Points: 105,825, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    Veteran50000 Experience Points

    Join Date
    Nov 2006
    Location
    Iowa
    Posts
    3,581
    Points
    105,825
    Level
    100
    Thumbs Up
    Received: 0
    Given: 0

    Speed Peeled Skin Off Hypersonic Glider

    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.
    Skin-peeling speed doomed hypersonic glider, U.S. says – CNN Security Clearance - CNN.com Blogs



  2. #2
    Addict
    Points: 164,346, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 10.0%
    Achievements:
    Created Album pictures50000 Experience PointsOverdriveRecommendation Second ClassSocial
    CLONECONES's Avatar
    Join Date
    Mar 2012
    Location
    RVA
    Posts
    7,185
    Points
    164,346
    Level
    100
    Thumbs Up
    Received: 5
    Given: 5

    Re: Speed Peeled Skin Off Hypersonic Glider

    Quote Originally Posted by cigaretteman View Post
    The resulting gaps created strong, impulsive shock waves around the vehicle as it traveled nearly 13,000 miles per hour





    Self proclaimed 2012 CF Newcomer of the Year

  3. #3
    Hall-Of-Famer
    Points: 61,702, Level: 77
    Level completed: 4%, Points required for next Level: 1,548
    Overall activity: 1.0%
    Achievements:
    SocialVeteranCreated Album pictures50000 Experience Points
    CycoCyclone's Avatar
    Join Date
    Apr 2009
    Location
    Urbandale
    Posts
    4,567
    Points
    61,702
    Level
    77
    Thumbs Up
    Received: 12
    Given: 76

    Re: Speed Peeled Skin Off Hypersonic Glider

    that's bad ***

    How many G's would the accel and decel put on a human?


    John Walters is my hero

  4. #4
    Pro
    Points: 78,222, Level: 86
    Level completed: 93%, Points required for next Level: 128
    Overall activity: 22.0%
    Achievements:
    SocialVeteran50000 Experience Points
    Goothrey's Avatar
    Join Date
    May 2009
    Location
    Austin, Tx
    Posts
    2,881
    Points
    78,222
    Level
    86
    Thumbs Up
    Received: 59
    Given: 16

    Re: Speed Peeled Skin Off Hypersonic Glider

    Cool. I remember the reports of it failing and the criticism for running such a test. Fools.


    Rip 'n Shred - Shred 'n Rip



  5. #5
    Pro
    Points: 132,718, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 3.0%
    Achievements:
    SocialVeteran50000 Experience Points
    stateofmind's Avatar
    Join Date
    Jul 2007
    Location
    Ankeny
    Posts
    2,585
    Points
    132,718
    Level
    100
    Thumbs Up
    Received: 50
    Given: 112

    Re: Speed Peeled Skin Off Hypersonic Glider

    So, I read the subject and thought it was skin off a person on a hang-glider.


    Last edited by stateofmind; 04-23-2012 at 12:41 PM.

  6. #6
    Legend
    Points: 275,917, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 27.0%
    Achievements:
    Social50000 Experience PointsVeteran
    VeloClone's Avatar
    Join Date
    Jan 2010
    Location
    Brooklyn Park, MN
    Posts
    12,954
    Points
    275,917
    Level
    100
    Thumbs Up
    Received: 495
    Given: 950

    Re: Speed Peeled Skin Off Hypersonic Glider

    Quote Originally Posted by stateofmind View Post
    So, I read the subject and thought it was skin off a person on a hang-glider.
    Well, it is something like this, but only if Wile E. Coyote was 1064 feet tall.



    EDIT: Hey, were did you question about propelling a Mach 20 vehicle go? It's absence ruins the entire joke!


    "There are five real good recruits in the state. We got three of them. One couldn’t get into school, and the other went to (the University of) Iowa...which is about the same thing." - Coach Johnny Orr

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
  • Football
  • Iowa State vs. North Dakota State
  • August 30, 2014
  • 11:00 AM