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Reaction Begins Building U.S. Hypersonic Engine Test Site



 
 
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  #1  
Old December 18th 17, 01:45 PM posted to sci.space.policy
Jeff Findley[_6_]
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Posts: 2,307
Default Reaction Begins Building U.S. Hypersonic Engine Test Site


Reaction Begins Building U.S. Hypersonic Engine Test Site
Dec 18, 2017 Guy Norris, Aerospace Daily & Defense Report
http://aviationweek.com/space/reacti...us-hypersonic-
engine-test-site

Curious. I've only ever known this to be a European endeavor. From
above:

Construction of the facility follows the award earlier this year
of a U.S. Defense Advanced Research Projects Agency (DARPA)
contract to test the engine?s pre-cooler heat exchanger, or HTX.
The test work, which is due to start in 2018, will focus on
running the HTX at airflow temperatures in excess of 1,800 deg F
(1,000 deg C), representing inlet conditions at Mach 5.

Ah yes, DARPA. I always thought this technology would make for an
excellent (military) air-breather. The heat exchanger, in particular,
isn't useful in vacuum. There is a point when the SABRE engine gets too
high in the atmosphere and ceases to pull in useful amounts of air, so
its inlets are closed and the engine switches to "pure rocket mode"
using store LOX.

I still seriously doubt we'll ever see a Skylon launch itself into orbit
with a useful payload. IMHO, we'll see a fully reusable (liquid fueled
rocket powered) TSTO long before even a prototype Skylon makes orbit
(likely with zero useful payload).

I don't doubt that we'll see SABRE engines powering (likely unmanned)
hypersonic reconnaissance aircraft and/or hypersonic cruise missiles.

Jeff
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  #2  
Old December 18th 17, 09:37 PM posted to sci.space.policy
Niklas Holsti
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Posts: 168
Default Reaction Begins Building U.S. Hypersonic Engine Test Site

On 17-12-18 14:45 , Jeff Findley wrote:

Reaction Begins Building U.S. Hypersonic Engine Test Site
Dec 18, 2017 Guy Norris, Aerospace Daily & Defense Report
http://aviationweek.com/space/reacti...us-hypersonic-
engine-test-site

Curious. I've only ever known this to be a European endeavor.


[snip]

I still seriously doubt we'll ever see a Skylon launch itself into orbit
with a useful payload. IMHO, we'll see a fully reusable (liquid fueled
rocket powered) TSTO long before even a prototype Skylon makes orbit
(likely with zero useful payload).


What do you feel about the SpaceX BFS as an SSTO? According to Musk, at
https://www.reddit.com/r/space/comme...ng_about_bfr/:


"Worth noting that BFS is capable of reaching orbit by itself with low
payload, but having the BF Booster increases payload by more than an
order of magnitude."

If the planned maximum ascent payload of the BFS is 150 tons, that means
its SSTO payload could be on the order of 10 tons...

Musk also says (at the same place) that SpaceX plans to test the BFS as
an SSTO, before they test it with the booster.

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Tidorum Ltd
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  #3  
Old December 19th 17, 02:12 AM posted to sci.space.policy
Jeff Findley[_6_]
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Posts: 2,307
Default Reaction Begins Building U.S. Hypersonic Engine Test Site

In article ,
lid says...

On 17-12-18 14:45 , Jeff Findley wrote:

Reaction Begins Building U.S. Hypersonic Engine Test Site
Dec 18, 2017 Guy Norris, Aerospace Daily & Defense Report
http://aviationweek.com/space/reacti...us-hypersonic-
engine-test-site

Curious. I've only ever known this to be a European endeavor.


[snip]

I still seriously doubt we'll ever see a Skylon launch itself into orbit
with a useful payload. IMHO, we'll see a fully reusable (liquid fueled
rocket powered) TSTO long before even a prototype Skylon makes orbit
(likely with zero useful payload).


What do you feel about the SpaceX BFS as an SSTO? According to Musk, at
https://www.reddit.com/r/space/comme...ng_about_bfr/:


"Worth noting that BFS is capable of reaching orbit by itself with low
payload, but having the BF Booster increases payload by more than an
order of magnitude."

If the planned maximum ascent payload of the BFS is 150 tons, that means
its SSTO payload could be on the order of 10 tons...

Musk also says (at the same place) that SpaceX plans to test the BFS as
an SSTO, before they test it with the booster.


Would be great if that is possible. It means you can test BFS without
the BFR. It would also quiet the "reusable SSTO is impossible" folks
really quick.

Even if BFS isn't SSTO capable, it's still going to be one big fracking
spaceship. ;-)

Jeff
--
All opinions posted by me on Usenet News are mine, and mine alone.
These posts do not reflect the opinions of my family, friends,
employer, or any organization that I am a member of.
 




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