Free Republic
Browse · Search
General/Chat
Topics · Post Article

Skip to comments.

World-first "impossible" rotating detonation engine fires up
New ATLAS ^ | 4 May 2020 | Loz Blain

Posted on 05/07/2020 6:30:26 PM PDT by DUMBGRUNT

click here to read article


Navigation: use the links below to view more comments.
first previous 1-2021-4041-42 next last
To: wastedyears

My favorite line that book:God was a knocking and he wanted in realllllll bad.


21 posted on 05/07/2020 10:50:53 PM PDT by BiteYourSelf
[ Post Reply | Private Reply | To 6 | View Replies]

To: Rockingham
Thanks for the thoughtful reply.
22 posted on 05/08/2020 12:32:59 AM PDT by marktwain (President Trump and his supporters are the Resistance. His opponents are the Reactionaries.)
[ Post Reply | Private Reply | To 18 | View Replies]

To: DUMBGRUNT

Cross between a rocket motor and a scram-jet. Note the “string of diamonds” shockwave in the exhaust.


23 posted on 05/08/2020 3:53:06 AM PDT by Tallguy (Facts be d@mned! The narrative must be protected at all costs!))
[ Post Reply | Private Reply | To 1 | View Replies]

To: Rockingham

Jet fuel pulse detonation is said to have been investigated in a secret US black project aircraft.

````

SR-71 used that method I believe I read


24 posted on 05/08/2020 4:15:56 AM PDT by PIF (They came for me and mine ... now its your turn)
[ Post Reply | Private Reply | To 19 | View Replies]

To: Repeal The 17th
Ain’t that what all engines do?

LOL! I guess you just don't understand science!

25 posted on 05/08/2020 4:25:17 AM PDT by Fresh Wind (This tagline is an advertisement-free zone. Is yours?)
[ Post Reply | Private Reply | To 16 | View Replies]

To: PIF

No, it was a claimed SR-71 follow on called Aurora, with a “donuts on a rope contrail” said to be indicative of a pulsed or wave detonation engine. This is now mostly thought debunked.


26 posted on 05/08/2020 4:38:58 AM PDT by Rockingham
[ Post Reply | Private Reply | To 24 | View Replies]

To: Rockingham

SR-71 has the same diamond shaped pulses (or “donuts on a rope contrail”) in its exhaust.

Since most of this is TS-SAP, debunking any of it is problematic.


27 posted on 05/08/2020 5:16:30 AM PDT by PIF (They came for me and mine ... now its your turn)
[ Post Reply | Private Reply | To 26 | View Replies]

To: ConservativeMind

That was my very first thought


28 posted on 05/08/2020 5:19:54 AM PDT by ShadowAce (Linux - The Ultimate Windows Service Pack)
[ Post Reply | Private Reply | To 3 | View Replies]

To: ConservativeMind

“Reminds me of a Jerry Pournelle/Niven book named “Footfall.”

Great stuff.


29 posted on 05/08/2020 5:29:12 AM PDT by dljordan
[ Post Reply | Private Reply | To 3 | View Replies]

To: daniel1212

“So another invention the military lets America’s enemies know they should also focus on.”

I guess no one in our military has the foresight that you do. :)


30 posted on 05/08/2020 5:31:04 AM PDT by dljordan
[ Post Reply | Private Reply | To 14 | View Replies]

To: Rockingham

Another implication of this technology would be a single-stage-to-orbit aircraft that takes off & lands from a conventional airstrip. This is a jet engine that has the thrust of a scramjet, but also carries it’s own oxidizer.


31 posted on 05/08/2020 5:47:33 AM PDT by Tallguy (Facts be d@mned! The narrative must be protected at all costs!))
[ Post Reply | Private Reply | To 18 | View Replies]

To: Daniel Ramsey

“Not a comment directed to the OP..”

The names are similar?
Must be some long lost kin.


32 posted on 05/08/2020 6:10:49 AM PDT by DUMBGRUNT
[ Post Reply | Private Reply | To 17 | View Replies]

To: PIF
True, but the distinctive contrails were seen long after the SR-71 was retired. And for several years, earthquake sensors and microphones in California picked up sonic booms in the early morning in association with those contrails, along with a triangle-shaped aircraft descending from over the Pacific and unusual chatter and signals on military aviation channels.

Of course, all of that can be explained in less provocative terms than as a deception operation or a secret hypersonic aircraft that is no longer in use because, with the Cold War over, its expense could not be justified. A few decades from now, a new tranche of documents may get dumped in the National Archives that tells the story.

33 posted on 05/08/2020 6:27:28 AM PDT by Rockingham
[ Post Reply | Private Reply | To 27 | View Replies]

To: Tallguy
Maybe. A lot depends on getting the necessary research and development done, along with detailed engineering, fabrication, and testing. Those take money and time, spurred by necessity and potential economic success.

Most of the supposed breakthroughs in technology that I have seen touted proved to be of limited effect, with many of them even being duds. The exceptions are the internet, the new genetic technologies, and the Green Revolution that averted dire predictions of worldwide famine.

34 posted on 05/08/2020 6:44:57 AM PDT by Rockingham
[ Post Reply | Private Reply | To 31 | View Replies]

To: 21twelve

With the price of fuel now, they’ll save $382.

While the cost of fuel is a major consideration... with stretched out supply lines it becomes logistics and more logistics...

Using less fuel can be a very good thing.

“And of course they are hoping that gas will stay cheap for the next 8(?) years or whatever.”

A few years ago Com Ed put up a ring of gas peaker plants around Chicago.
I hope they last more than “8(?) years or whatever”.


35 posted on 05/08/2020 6:45:35 AM PDT by DUMBGRUNT
[ Post Reply | Private Reply | To 20 | View Replies]

To: Tallguy

Note the “string of diamonds” shockwave in the exhaust.

Can you give a clue of what that indicates?


36 posted on 05/08/2020 6:47:09 AM PDT by DUMBGRUNT
[ Post Reply | Private Reply | To 23 | View Replies]

To: Tallguy

Guessing it has to do with wave propagation/timing?

Like the CVCC? https://en.wikipedia.org/wiki/CVCC

Or some swamp gas powered engines that use a constant spark timed by port length?


37 posted on 05/08/2020 6:52:28 AM PDT by DUMBGRUNT
[ Post Reply | Private Reply | To 23 | View Replies]

To: Repeal The 17th

That’s the way my non-electronic diesel works on my little tractor. With gas engines though, they will die when the spark is cut off. Whether supplies by a battery, generator, alternator or magneto, they need electricity to run. A mechanical diesel does not. I have to pull a little lever that cuts off fuel to stop the engine.


38 posted on 05/08/2020 7:40:35 AM PDT by Pollard (shadowbanned)
[ Post Reply | Private Reply | To 16 | View Replies]

To: DUMBGRUNT

It’s indicative of a pulsed hypersonic shockwave. The rumored Aurora spy plane (or whatever it was) left a very similar contrail that’s been photographed several times. Aviation experts theorized it was the exhaust of a hypersonic scramjet powered aircraft capable of speeds in excess of Mach 5.

You couldn’t see the aircraft, but you could see the “footprints” it left in the sky.

There was one north sea oil worker who described an unusual looking triangular aircraft hanging on the refueling boom as it passed overhead. Sketches but no photographs.


39 posted on 05/08/2020 7:49:00 AM PDT by Tallguy (Facts be d@mned! The narrative must be protected at all costs!))
[ Post Reply | Private Reply | To 36 | View Replies]

To: dljordan
I guess no one in our military has the foresight that you do. :)

Is this your response to anyone who posts anything critical of a government practice, as if they were infallible? If not, then instead of criticism for so doing, you should form a defense for the frequent disclosure of new weapons.

40 posted on 05/08/2020 2:55:41 PM PDT by daniel1212 (Trust the risen Lord Jesus to save you as a damned and destitute sinner + be baptized + follow Him)
[ Post Reply | Private Reply | To 30 | View Replies]


Navigation: use the links below to view more comments.
first previous 1-2021-4041-42 next last

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
General/Chat
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson