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Surfing a Supersonic Shockwave

Posted by: sanman - Tue Oct 19, 2010 1:23 pm
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Surfing a Supersonic Shockwave 
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Space Walker
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Post Surfing a Supersonic Shockwave   Posted on: Tue Oct 19, 2010 1:23 pm
I'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/

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This type of effect could facilitate the separation of an upper-stage vehicle in supersonic flight.


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Post 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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Post 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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Post Re: Surfing a Supersonic Shockwave   Posted on: Tue Oct 19, 2010 6:47 pm
Fixed it :)

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Post 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.

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Post 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]

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Post Re: Surfing a Supersonic Shockwave   Posted on: Wed Oct 20, 2010 7:11 pm
"You cannot use certain BBCodes: [flash]."

:cry:


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Post Re: Surfing a Supersonic Shockwave   Posted on: Wed Oct 20, 2010 7:45 pm
JamesG wrote:
"You cannot use certain BBCodes: [flash]."

:cry:


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 :)

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Post Re: Surfing a Supersonic Shockwave   Posted on: Thu Oct 21, 2010 1:16 am
Nope. Same error.


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Post 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.

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Post 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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Post 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


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Post 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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