http://wiki.newmars.com/index.php?action=history&feed=atom&title=Scram_jetScram jet - Revision history2026-05-19T06:23:25ZRevision history for this page on the wikiMediaWiki 1.29.1http://wiki.newmars.com/index.php?title=Scram_jet&diff=505&oldid=prevJosh Cryer: 1 revision2009-01-21T11:02:37Z<p>1 revision</p>
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</td></tr></table>Josh Cryerhttp://wiki.newmars.com/index.php?title=Scram_jet&diff=504&oldid=prevRxke: /* External Links */ typo2005-08-15T07:39:41Z<p><span dir="auto"><span class="autocomment">External Links: </span> typo</span></p>
<p><b>New page</b></p><div>==Intro==<br />
A scram jet is a hypersonic air breathing vehicle where the air is collected and ignited with minimal change in velocity of the air stream. It is known as the holy grail of aerospace engineering. The fact that the air being collected for the oxidizer changes little in velocity before oxidization occurs, means that the vehicle is able to collect the oxidizer from the atmosphere with less [[drag]] than would be typical of a other air breathing vehicles such as (a ram jet and a jet plane). <br />
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The vehicle has many applications, including military (see [[project falcon]]), space (see [[X43-A]]), rapid parcel deliver and 30 minute flights from New York to Tokyo. A scram presents the best hope for cheap access to space because it could potentially produce a [[SSTO]] ]]reusable launch vehicle]] with a [[mass ratio]] 16 times better than what is possible from non air breathing vehicles. <br />
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This is because the mass of the [[oxidizer]] ([[oxygen]]) is 16 times more than the mass of the [[reducer]] ([[hydrogen]]). Despite the scram jets superior performance it cannot be used at each point in the flight because it only works at high velocities within the atmosphere. Other methods of propulsion like the ramjet will be required to get the vehicle up to speed and take the scram jet from the upper portion of the atmosphere to space.<br />
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Although the majority of the trip in distance is between the top of the atmosphere to [[LEO]] by far the greatest energy is spent obtaining [[orbital velocity]] as opposed to [[orbital altitude]]. Thus the majority of the energy will be given to the rocket through scram jet propulsion and not other propulsion techniques.<br />
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==New Mars Discussions==<br />
==External Links==<br />
A nice short explanation of the [http://www.area51zone.com/aircraft/ram-scram.html ramjet and scramjet] with some simple diagrams. Seems slightly dated though<br><br />
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S-43A at [http://www.nasa.gov/missions/research/x43-main.html NASA]<br><br />
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[http://www.nasa.gov/missions/research/f_scramjets.html NASA] What is a scram jet<br><br />
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Scramjet from [http://en.wikipedia.org/wiki/Scramjet wikipedia] Contains a fair amount of theory. A good second source.<br><br />
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Scramjet from [http://www.aerospaceweb.org/question/propulsion/q0170.shtml aerospaceweb.org] As well as the [[X-43A]] shows the conceptural [[WaveRider]] ([[SED-WR]])<br><br />
<br />
==Theoretical Papers==<br />
Alexander S. Roudakov, Vyacheslav L. Semenov, John W. Hicks,<br />
[http://www.nasa.gov/centers/dryden/pdf/88580main_H-2243.pdf NASA Dryden Flight Research Center<br />
Edwards, California Recent Flight Test Results of the Joint CIAMNASA<br />
Mach 6.5 Scramjet Flight Program]<br><br />
<br />
M. K. Smart, [http://www.nianet.org/shortcourses/pdfs/AIAA-JPP-V17No2.pdf Experimental Testing of a Hypersonic Inlet with Rectangular-to-Elliptical Shape Transition]<br><br />
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==Gentle Papers==<br />
[http://www.aiaa.org/pdf/inside/04_TC_Highlights/aiaa-abp.pdf Air-breathing propulsion], PROPULSION AND ENERGY<br><br />
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==And Now Some Poems==<br />
'''The Scram Bird ''' [http://www.newmars.com/forums/viewtopic.php?t=1027&start=260 ref]<br />
<br><br />
Soaring High like None Bird Before <br><br />
Breathing air too thin for a plane <br><br />
Creature or Machine it goes at speeds insane. <br><br />
A feet man, swift and cheater would adore <br><br />
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Between black and blue the scram bird soars <br><br />
Heavy rockets put to shame <br><br />
Only primitive technology is to blame <br><br />
The holler grail of aviation and more<br><br />
<br><br />
By John Creighton</div>Rxke