• Hi Guest! Forum rules have been updated. All users please read here.

SR-72?

Foo Fighter

I came, I saw, I drank some tea (and had a bun).
Senior Member
Joined
Jul 19, 2016
Messages
1,854
Reaction score
752
The lack of English language ability is something I find more than a little annoying, it IS our native language after all. That some so called journalists insist on calling the police 'cops' is just another of those poor usage examples. Pillocks tbh.
 

CJGibson

ACCESS: Top Secret
Senior Member
Joined
May 26, 2011
Messages
1,493
Reaction score
774
Pity this doesn't include boom-related seismic activity.

http://inducedearthquakes.org/

..and this

https://earthquake.usgs.gov/earthquakes/map/

Go to settings, select 1 day, all magnitudes, US and check out Nevada

Be interesting to compare seismic rather than sound data for these recent booms with those from the 1980s and 1990s. I might even dust off my 25-year-old request to the BGS for seismic data.

Chris
 

Sundog

ACCESS: Top Secret
Senior Member
Joined
Aug 2, 2006
Messages
2,861
Reaction score
320
I lean towards aircraft since some said "double-booms" like an aircraft would make. Any supersonic aircraft could make these; I remember hearing these from the B-58s when I was a kid. I would also like to know how many of these rumblings are heard near supersonic corridors and what the weather conditions were at the time they were heard, because that would also affect which way the sound traveled.
 

Flyaway

ACCESS: Top Secret
Senior Member
Joined
Jan 21, 2015
Messages
4,915
Reaction score
2,730
Yeah sorry about the source though at least they managed to collate some disparate sources of information, I will give them that. This is probably just increased training activity as these appear to be training areas anyway.
 

RavenOne

ACCESS: Secret
Joined
Jun 18, 2008
Messages
352
Reaction score
465
Has anyone got a glimpse of the demonstrator Flying out of Plant 42

Mildly surprised nom of the enthusiasts who are in local area have captured a photos of it’

Cheers
 

bobbymike

ACCESS: USAP
Joined
Apr 21, 2009
Messages
10,551
Reaction score
1,536
https://www.nextbigfuture.com/2018/01/lockheed-may-have-completed-a-prototype-hypersonic-sr72.html

Stephen Trimble Tweeted out

Jack O'Bannion, VP of Strategy at Skunk Works, is speaking today at SciTech conference. He showed a slide of the SR-72 and said: "Without digital transformation that aircraft you see there could not have been made." Soooo ... does that mean that aircraft was made?
 

RavenOne

ACCESS: Secret
Joined
Jun 18, 2008
Messages
352
Reaction score
465
Picks this thread from Greatest Planes That Never Were ...before anyone asks if I subscribe to this ummm sinteresting tabloid of ours

https://theaviationist.com/2017/10/12/the-enigmatic-sr-72-and-the-palmdale-sightings-what-do-they-tell-us-about-americas-secret-hypersonic-program/

Their excellent research carried out by their reporters are second to none

I do love the use of the bomber adjective ...

Back to thread so no enthusiasts around Palmdale have gotten a glimpse or far away shot?

Cheers
 

quellish

I am not actually here.
Senior Member
Joined
Aug 6, 2007
Messages
2,182
Reaction score
215
RavenOne said:
Has anyone got a glimpse of the demonstrator Flying out of Plant 42

Mildly surprised nom of the enthusiasts who are in local area have captured a photos of it’

Cheers

Here's the thing. Plant 42 is not Groom Lake. It is surrounded by public roads (and parks), and is in an increasingly urbanized area. There is a major highway within a mile or two, shopping malls, etc. You can't really fly anything secretly in and out of there.

If there was a demonstrator they would truck it to Edwards or Groom Lake to fly it.
 

Flyaway

ACCESS: Top Secret
Senior Member
Joined
Jan 21, 2015
Messages
4,915
Reaction score
2,730
A Bloomberg article on the recent LM comments.
https://www.bloomberg.com/news/articles/2018-01-16/america-s-fastest-spy-plane-may-be-back-and-hypersonic

Notice this quote from the same O’Banion as I have not seen this mentioned before (but might have missed it).

“But now we can digitally print that engine with an incredibly sophisticated cooling system integral into the material of the engine itself and have that engine survive for multiple firings for routine operation.”

Taking these quotes as a whole it certainly sounds like they may have at the very least built either a technology demonstrator or full prototype.
 

bobbymike

ACCESS: USAP
Joined
Apr 21, 2009
Messages
10,551
Reaction score
1,536
Boeing plane supposedly called "Valkyrie II"

https://www.popularmechanics.com/military/aviation/a16025553/we-know-a-tiny-bit-more-about-boeings-sr-71-replacement-concept/
 

flateric

ACCESS: Above Top Secret
Staff member
Top Contributor
Senior Member
Joined
Apr 2, 2006
Messages
9,105
Reaction score
1,088
That's perfect, but what it has to do with this topic?
 

bobbymike

ACCESS: USAP
Joined
Apr 21, 2009
Messages
10,551
Reaction score
1,536
flateric said:
That's perfect, but what it has to do with this topic?
My most humblest of apologies forgot the Boeing design had it own thread. :-[
 

DrRansom

I really should change my personal text
Joined
Dec 15, 2012
Messages
538
Reaction score
11

Flyaway

ACCESS: Top Secret
Senior Member
Joined
Jan 21, 2015
Messages
4,915
Reaction score
2,730
Cross posting from the REL thread as this part of the lecture is relevant to the SR-72. I assume they are thinking of an upgraded version of the proposed LAPCAT engine.

Images of the SR-72 featured prominently (title slide and it's own dedicated slide), received a direct callout as a potential application, and a mention that Skylon's US location in Colorado was explicitly chosen for proximity to Lockheed Martin, and that the head of their US operations is the former head of Lockheed Martin's 'New Vehicles' division. So yeah, very much nudge-nudge-wink-wink-saynomore there.

Mark Wood did a guest lecture at the IET recently, source summary here.
 

CJGibson

ACCESS: Top Secret
Senior Member
Joined
May 26, 2011
Messages
1,493
Reaction score
774
Just up the road from Air Products at Pueblo.




Chris
 

Attachments

  • You-Aint-Seen-Me-Right-600x458.jpg
    You-Aint-Seen-Me-Right-600x458.jpg
    38.7 KB · Views: 667

marauder2048

"I should really just relax"
Joined
Nov 19, 2013
Messages
3,159
Reaction score
471
So yeah, very much nudge-nudge-wink-wink-saynomore there.

Odd given that Aerojet already confirmed that it's Aerojet propulsion on the plane.
 

Flyaway

ACCESS: Top Secret
Senior Member
Joined
Jan 21, 2015
Messages
4,915
Reaction score
2,730
marauder2048 said:
So yeah, very much nudge-nudge-wink-wink-saynomore there.

Odd given that Aerojet already confirmed that it's Aerojet propulsion on the plane.

I imagine REL are angling to replace them.
 

marauder2048

"I should really just relax"
Joined
Nov 19, 2013
Messages
3,159
Reaction score
471
Which would be tantamount to scrapping and restarting the entire SR-72 effort.
 

Flyaway

ACCESS: Top Secret
Senior Member
Joined
Jan 21, 2015
Messages
4,915
Reaction score
2,730
marauder2048 said:
Which would be tantamount to scrapping and restarting the entire SR-72 effort.

Maybe worth it if a REL supplied power plant is a better option, especially as it’s hard to say exactly how far the SR-72 development has actually got.
 

Foo Fighter

I came, I saw, I drank some tea (and had a bun).
Senior Member
Joined
Jul 19, 2016
Messages
1,854
Reaction score
752
Flyaway said:
marauder2048 said:
Which would be tantamount to scrapping and restarting the entire SR-72 effort.

Maybe worth it if a REL supplied power plant is a better option, especially as it’s hard to say exactly how far the SR-72 development has actually got.

Or if there is such an aircraft and disinformation is not the whole story.
 

sferrin

ACCESS: USAP
Senior Member
Joined
Jun 3, 2011
Messages
13,675
Reaction score
1,714
Flyaway said:
marauder2048 said:
Which would be tantamount to scrapping and restarting the entire SR-72 effort.

Maybe worth it if a REL supplied power plant is a better option, especially as it’s hard to say exactly how far the SR-72 development has actually got.

Given they seem to have been working on it for years now one would think they'd be fairly far down the path. And anyway, has REL ever even tested an engine? (And I don't mean, "yeah we have an awesome heat exchanger we tested", I mean the whole enchilada, from intake to nozzle.)
 

FighterJock

ACCESS: Top Secret
Joined
Oct 29, 2007
Messages
1,696
Reaction score
430
sferrin said:
Flyaway said:
marauder2048 said:
Which would be tantamount to scrapping and restarting the entire SR-72 effort.

Maybe worth it if a REL supplied power plant is a better option, especially as it’s hard to say exactly how far the SR-72 development has actually got.

Given they seem to have been working on it for years now one would think they'd be fairly far down the path. And anyway, has REL ever even tested an engine? (And I don't mean, "yeah we have an awesome heat exchanger we tested", I mean the whole enchilada, from intake to nozzle.)

I am sure that REL will one day test a full scale SABRE engine from intake to nozzle, once they have all the necessary funding in place.
 

sferrin

ACCESS: USAP
Senior Member
Joined
Jun 3, 2011
Messages
13,675
Reaction score
1,714
FighterJock said:
I am sure that REL will one day test a full scale SABRE engine from intake to nozzle, once they have all the necessary funding in place.

Even subscale would be something. Until they do though we don't know it will work as advertised. (We've seen more than a few of those fall by they wayside over the decades.)
 

marauder2048

"I should really just relax"
Joined
Nov 19, 2013
Messages
3,159
Reaction score
471
There's also the minor issue of there being no discernible Air Force interest in sub-cooled
methane or cryogenic hydrogen fueled re-usable air-breathers particularly as it would make
very little sense for a regional ISR platform.
 

bobbymike

ACCESS: USAP
Joined
Apr 21, 2009
Messages
10,551
Reaction score
1,536
https://cen.acs.org/energy/fossilFuels/Cool-fuel-hypersonic-aircraft/96/i18
 

marauder2048

"I should really just relax"
Joined
Nov 19, 2013
Messages
3,159
Reaction score
471
Great find!

So one of the best pieces on hypersonics I've read in years comes from the American Chemical Society...
 

sferrin

ACCESS: USAP
Senior Member
Joined
Jun 3, 2011
Messages
13,675
Reaction score
1,714
marauder2048 said:
Great find!

So one of the best pieces on hypersonics I've read in years comes from the American Chemical Society...

"A large fraction of the research on endothermic fuels published nowadays in chemistry journals comes from scientists in China. Guozhu Liu and coworkers at Tianjin University also studied the effect of zeolites on JP-10 cracking. "

Well that makes my heart soar. Also, I thought the whole point of the X-51 was to demonstrate the viability of the process of cracking a heavy fuel into lighter components. ???
 

marauder2048

"I should really just relax"
Joined
Nov 19, 2013
Messages
3,159
Reaction score
471
sferrin said:
Also, I thought the whole point of the X-51 was to demonstrate the viability of the process of cracking a heavy fuel into lighter components. ???

JP-7 certainly but JP-10 has a tendency, due to its coking behavior, to inactivate/poison the catalysts they've looked at.
 

Flyaway

ACCESS: Top Secret
Senior Member
Joined
Jan 21, 2015
Messages
4,915
Reaction score
2,730
USAF set to begin dual mode ramjet design for hypersonic vehicle

The US Air Force has set plans to begin the competitive phase of a plan to develop a dual mode ramjet for a new class of missiles and aircraft with top speeds over Mach 3.

”The overall objective is to identify, develop, mature, and demonstrate technologies that enable refurbishable high speed (M>3) capability for intelligence/surveillance/reconnaissance (ISR) and strike platforms by 2028, and for quick-turn fully reusable systems by 2035,” the AFRL stated in 2016.

“It is envisioned that the earlier demonstration systems will be air-launched utilising rocket-boost to reach hypersonic cruise speeds, and later employing combined cycle engines that permit runway operations,” the AFRL says.

https://www.flightglobal.com/news/articles/usaf-set-to-begin-dual-mode-ramjet-design-for-hypers-449581/

Also are they hiring in people for the program.

https://www.flightglobal.com/news/articles/analysis-does-skunk-works-hiring-binge-indicate-sec-449492/
 

flateric

ACCESS: Above Top Secret
Staff member
Top Contributor
Senior Member
Joined
Apr 2, 2006
Messages
9,105
Reaction score
1,088
Everything is perfect except the fact that model doesn't look like SR-72 official renderings
 

Attachments

  • landscape-1506607573-dk0biquw4aejmdx.jpg
    landscape-1506607573-dk0biquw4aejmdx.jpg
    18.1 KB · Views: 736
  • free-3d-printable-of-the-week-don-foley-3d-printable-sr-72-aircraft-9.jpg
    free-3d-printable-of-the-week-don-foley-3d-printable-sr-72-aircraft-9.jpg
    22.5 KB · Views: 729

TsrJoe

ACCESS: Secret
Senior Member
Joined
Jan 2, 2006
Messages
446
Reaction score
330
just musing, are there any mooted dimensions for the SR.72 concept ? I have seen various figures quoted for length and span but none seem to confer with each other ? another query is undercarriage placement and configuration, any thoughts ?

cheers, Joe
 

zebra159357

I really should change my personal text
Joined
Nov 30, 2018
Messages
33
Reaction score
29
Highly likely a sub-scale demonstrator/prototype has flown already. But I havent seen anything regarding SR-72 program for quite some time...
 

In_A_Dream

ACCESS: Secret
Joined
Jun 3, 2019
Messages
230
Reaction score
95
Highly likely a sub-scale demonstrator/prototype has flown already. But I havent seen anything regarding SR-72 program for quite some time...

Falcon & a couple other related projects may have coalesced into something that went dark.
 
Top