http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/ Engadget Comments for http://www.engadget.com/media/feedlogo.gif http://www.engadget.com en-us Copyright 2012 Weblogs, Inc. The contents of this feed are available for non-commercial use only. Blogsmith http://www.blogsmith.com/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 1:33PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 2:36PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 2:37PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 1:34PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 1:44PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 1:44PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 1:41PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 2:01PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 2:19PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 3:51PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 1:44PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 1:44PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 11:07PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 25th 2008 10:19PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/
]]>Jun 24th 2008 1:45PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://en.wikipedia.org/wiki/Aurora_(aircraft)]]>Jun 24th 2008 2:04PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://en.wikipedia.org/wiki/Boeing_Bird_of_Prey
As for this, it looks like they're reverse-engineering the SR-71's Turbo-Ramjet and using knowledge from the X-43 project to allow supersonic combustion.]]>Jun 24th 2008 7:18PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 25th 2008 8:08AMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/
This engine is not a scramjet it is supposed to be an off the shelf turbojet that runs next to a constant volume combustor like a ramjet. If this program is successful (and that is a big if in gov. programs) then this would only be a scramjet equipped vehicle enabler.

Yes next to a ramjet, the two will not be combined into one engine (as the turbojet and ramjet on the SR-71 are) just run side by side or possibly in an annular configuration. So if/when it comes time to combine this with a scramjet it would be running alongside of it, and you would actually have three sortof separate propulsion systems operating on this hypothetical vehicle. Its like having 3 separate engines + transmissions on your car, and each will only operate within a certain range of speeds. Since it has 3 separate propulsion systems reliability will go down ground support requirements go up so costs go way up.

Anyways what we're left with is a rehash of the SR-71's propulsion system only now more complex: Blackbird 2.0

FYI alot of the above is in the pdf on the page this article links to.

]]>Jun 25th 2008 9:30AMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 1:46PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 2:14PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 2:23PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 25th 2008 11:11AMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 1:49PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 1:51PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 2:54PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 1:50PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/
unleash a big load and even humans will do 10 Mach to get away from the scene!]]>Jun 24th 2008 1:54PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 2:58PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 4:51PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/
Maybe they can work in a turbofan?]]>Jun 24th 2008 1:58PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/

Turbofans are great for subsonic cruise. Acceleration to Mach 4 is, oddly enough, not subsonic cruise, and turbojets are the only way to do that.

Oh, and if you're concerned about turbojets... did you notice it uses a scramjet? Those are just the fuel-sipping economy-car engines of the sky, ya know.]]>Jun 24th 2008 2:42PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 2:03PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/
It's already possible. But Hydrogen isn't exactly cheap or power dense. Maybe a coal-burning aircraft is the answer... But none of these options is commercially viable yet, nor promising & interesting enough for research funding.

(Here's an idea: maybe we should conserve oil for uses where it's the sanest option, and work on alternate fuels where they work well...)]]>Jun 24th 2008 2:57PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 2:04PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 2:16PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 2:43PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 11:29PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 2:55PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 3:08PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 3:41PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 4:56PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 5:01PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/
(no, seriously, i can see this type of jets become more viable to at least government bodies in 2 decades or so... making war more likely to be brought into a higher elevation - pun intended)]]>Jun 24th 2008 3:37PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Jun 24th 2008 3:58PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/
http://www.merkle.com/pluto/pluto.html

Ok ok, it's a ramjet and not a scramjet, and a missile not a plane, but still. ;)

Jojo]]>Jun 27th 2008 3:49PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/
This talk about screamjets is really intersting, can you suggest or post me some links about the subject ur explaining here?

Thanks]]>Jun 24th 2008 4:15PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/
http://en.wikipedia.org/wiki/Ramjet#Scramjets

http://en.wikipedia.org/wiki/Ramjet#Scramjets

happy reading! :)]]>Jun 24th 2008 5:21PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.youtube.com/watch?v=HB7tc9pVvYg]]>Jun 24th 2008 5:13PMhttp://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/http://www.engadget.com/2008/06/24/darpas-vulcan-engine-combines-turbo-jet-with-scramjet-faces-wi/Thats what she said!

The problem is my tongue craps out just past Mach 3.... :-(]]>Jun 24th 2008 5:28PM