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Surfing a Supersonic Shockwave
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Space Walker  
Joined: Tue Sep 15, 2009 11:59 pm
Posts: 188 
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 Surfing a Supersonic Shockwave Posted on: Tue Oct 19, 2010 1:23 pmI'm wondering if this research could be the basis for developing a TSTO whose lower stage is a scramjet:
http://www.technologyreview.com/blog/arxiv/25907/  This type of effect could facilitate the separation of an upper-stage vehicle in supersonic flight. |
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Space Station Commander  
Joined: Mon Dec 18, 2006 11:15 pm
Posts: 598 Location: Columbus, GA USA
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Re: Surfing a Supersonic Shockwave Posted on: Tue Oct 19, 2010 4:30 pm Might be useful as data for modeling but its really just a quantification of common sense. Yes, high speed air is going to push objects apart. Calling it "surfing" is a bit disingenuous. The object don't maintain a fixed separation.
The problem of separating objects at supersonic speeds isn't getting them to part, its getting them to part cleanly. Aerodynamic forces can sometimes do weird things. Its something aircraft and munitions designers spend a lot of testing time on. A4 Skyhawk hit by weapon dropped from an F18 test. Last edited by JamesG on Thu Oct 21, 2010 2:54 pm, edited 5 times in total. |
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Space Station Commander
Joined: Mon Dec 18, 2006 11:15 pm
Posts: 598 Location: Columbus, GA USA
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Re: Surfing a Supersonic Shockwave Posted on: Tue Oct 19, 2010 4:31 pm Opps. I broke the board...
No video embedding? Last edited by JamesG on Tue Oct 19, 2010 7:21 pm, edited 1 time in total. |
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Moon Mission Member  
Joined: Tue Jul 15, 2003 8:46 pm
Posts: 1204 Location: Kapellen, Antwerp, Belgium, Europe, Planet Earth, the Milky Way Galaxy
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Re: Surfing a Supersonic Shockwave Posted on: Tue Oct 19, 2010 6:47 pm Fixed it
 _________________ Heavier-than-air flying machines are impossible. - Lord Kelvin, 1892 |
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Space Station Commander 
Joined: Mon May 31, 2004 9:47 pm
Posts: 729 Location: Yerushalayim (Jerusalem) - capital of Israel!
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Re: Surfing a Supersonic Shockwave Posted on: Wed Oct 20, 2010 5:00 pm Hypersonic vehicles use the shockwave (http://en.wikipedia.org/wiki/Waverider), and one use of hypersonic vehicles is as a stage to get to space.
_________________ “Once you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, and there you will always long to return.” -Leonardo Da Vinci |
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Moon Mission Member
Joined: Tue Jul 15, 2003 8:46 pm
Posts: 1204 Location: Kapellen, Antwerp, Belgium, Europe, Planet Earth, the Milky Way Galaxy
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Re: Surfing a Supersonic Shockwave Posted on: Wed Oct 20, 2010 5:27 pm @JamesG, here is an example of video embedding:
Code: [flash=640,385]http://www.youtube.com/v/Ccfw01c7yXg[/flash] _________________ Heavier-than-air flying machines are impossible. - Lord Kelvin, 1892 |
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Space Station Commander
Joined: Mon Dec 18, 2006 11:15 pm
Posts: 598 Location: Columbus, GA USA
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Re: Surfing a Supersonic Shockwave Posted on: Wed Oct 20, 2010 7:11 pm "You cannot use certain BBCodes: [flash]."
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Moon Mission Member
Joined: Tue Jul 15, 2003 8:46 pm
Posts: 1204 Location: Kapellen, Antwerp, Belgium, Europe, Planet Earth, the Milky Way Galaxy
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Re: Surfing a Supersonic Shockwave Posted on: Wed Oct 20, 2010 7:45 pm JamesG wrote: "You cannot use certain BBCodes: [flash]." I enabled it for the users now, it was by default disabled it seems. All flash that requires autostart etc is disabled. As well as certain scripts as security (redirects etc). Let me know if it works _________________ Heavier-than-air flying machines are impossible. - Lord Kelvin, 1892 |
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Space Station Commander
Joined: Mon Dec 18, 2006 11:15 pm
Posts: 598 Location: Columbus, GA USA
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Re: Surfing a Supersonic Shockwave Posted on: Thu Oct 21, 2010 1:16 am Nope. Same error.
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Moon Mission Member
Joined: Tue Jul 15, 2003 8:46 pm
Posts: 1204 Location: Kapellen, Antwerp, Belgium, Europe, Planet Earth, the Milky Way Galaxy
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Re: Surfing a Supersonic Shockwave Posted on: Thu Oct 21, 2010 9:45 am JamesG wrote: Nope. Same error. Next attempt, forums had it disabled in each as well Hopefully it's working now._________________ Heavier-than-air flying machines are impossible. - Lord Kelvin, 1892 |
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Space Station Commander
Joined: Mon Dec 18, 2006 11:15 pm
Posts: 598 Location: Columbus, GA USA
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Re: Surfing a Supersonic Shockwave Posted on: Thu Oct 21, 2010 2:54 pm third (or fourth) time was the charm. Thanks.
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Space Walker
Joined: Tue Jan 18, 2005 11:12 pm
Posts: 136 Location: Sacramento, CA
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Re: Surfing a Supersonic Shockwave Posted on: Wed Oct 27, 2010 1:02 am Here's a little old school hypersonic "surfing". It was called the IMP Glider. It was an inflated re-entry glider. It did a mach 8 re-entry from a sounding rocket in 1964. We commission flowmetrics to do a new flow study on the vehicle for us. It flew all the way to the ground, no heat shield.
JP www.jpaerospace.com You do not have the required permissions to view the files attached to this post. |
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Space Station Commander 
Joined: Wed Aug 18, 2004 8:47 am
Posts: 517 Location: Science Park, Cambridge, UK
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Re: Surfing a Supersonic Shockwave Posted on: Mon Nov 01, 2010 3:56 pm More information on IMP
http://www.jamesoberg.com/112003irv_his.html Technically I suppose it does have a heat shield - spray on silicone..... |
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