Author Topic: Hermeus hypersonic plane  (Read 34450 times)

Offline Vahe231991

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Re: Hermeus hypersonic plane
« Reply #60 on: 08/11/2023 07:50 pm »
The post written by me in question isn't a product of artificial intelligence. I never wrote "blah blah blah" because I am both an English speaker and multilingual speaker. I was just commenting on the latest news on development of the Darkhorse because Hermeus Aerospace had to make a decision on what turbofan should be used for the gas turbine part of the Chimera II TBCC engine for the Darkhorse engine because it knows that the J85 turbojet that is part of the Quaterhorse's powerplant is technologically obsolete compared to the F100.

What you wrote here and other places is equivalent to "blah blah blah" because it doesn't add anything of substance to the discussion.   It is just filler.

I mean did the "decision really demonstrate flexibility"?   And if so, why is it necessary to point out here?
I'm emphasizing that Hermeus Aerospace had to make a decision of which jet engine should be used as the gas turbine portion of the Chimera engine, and that because the Chimera II is a bigger engine, it required a larger engine for its gas turbine component. Hermeus Aerospace opted for existing jet engines to serve as the gas turbine components for the Chimera and Chimera II TBCC engines in order to save billions of dollars in research and development costs and years of schedule, and since the Darkhorse design is slightly bigger and faster than the Quarterhorse, I'd imagine that Hermeus Aerospace was looking for an existing jet engine to act as the gas turbine component of the Chimera II that would have a powerful-enough thrust-to-weight ratio to propel the Darkhorse to its planned Mach 5 speed. If the Halcyon is ever built following flight testing of the Darkhorse, Hermeus Aerospace could optimize the Halcyon's TBCC engine to use as the gas turbine component either the F100 or F110.

Offline Hog

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Re: Hermeus hypersonic plane
« Reply #61 on: 08/16/2023 02:24 pm »
The post written by me in question isn't a product of artificial intelligence. I never wrote "blah blah blah" because I am both an English speaker and multilingual speaker. I was just commenting on the latest news on development of the Darkhorse because Hermeus Aerospace had to make a decision on what turbofan should be used for the gas turbine part of the Chimera II TBCC engine for the Darkhorse engine because it knows that the J85 turbojet that is part of the Quaterhorse's powerplant is technologically obsolete compared to the F100.

What you wrote here and other places is equivalent to "blah blah blah" because it doesn't add anything of substance to the discussion.   It is just filler.

I mean did the "decision really demonstrate flexibility"?   And if so, why is it necessary to point out here?
I'm emphasizing that Hermeus Aerospace had to make a decision of which jet engine should be used as the gas turbine portion of the Chimera engine, and that because the Chimera II is a bigger engine, it required a larger engine for its gas turbine component. Hermeus Aerospace opted for existing jet engines to serve as the gas turbine components for the Chimera and Chimera II TBCC engines in order to save billions of dollars in research and development costs and years of schedule, and since the Darkhorse design is slightly bigger and faster than the Quarterhorse, I'd imagine that Hermeus Aerospace was looking for an existing jet engine to act as the gas turbine component of the Chimera II that would have a powerful-enough thrust-to-weight ratio to propel the Darkhorse to its planned Mach 5 speed. If the Halcyon is ever built following flight testing of the Darkhorse, Hermeus Aerospace could optimize the Halcyon's TBCC engine to use as the gas turbine component either the F100 or F110.
Again, so what? Did the decision really demonstrate flexibility? 
Both the F-100 and F-110 are multiple decades old engines.  The F-100 was contracted for USN and USAF usage in the F-14/15, both of which entered service in the 1970's.

Paul

Offline Hog

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Re: Hermeus hypersonic plane
« Reply #62 on: 08/16/2023 02:48 pm »

blah blah blah....

Someone please stop this AI crap

Agreed. There have been numerous comments like yours about this poster.

I go back and forth if it's AI, a non-English speaker with a bad translator Bablesfish, a young person trying to sound intelligent and/or important and getting their rocks off seeing their posts here and interactions with others, or an elder with time on their hands scouring NSF for old threads to revive as a hobby (and to annoy Jim).  I've got them on IGNORE, but will look at their posts once in a while just to see what kind of drivel they posted that day. Once in a while they randomly make a decent post, but otherwise they're just an annoying mosquito.

I've seen worse, but NSF could lose them without pain.
The post written by me in question isn't a product of artificial intelligence. I never wrote "blah blah blah" because I am both an English speaker and multilingual speaker. I was just commenting on the latest news on development of the Darkhorse because Hermeus Aerospace had to make a decision on what turbofan should be used for the gas turbine part of the Chimera II TBCC engine for the Darkhorse engine because it knows that the J85 turbojet that is part of the Quaterhorse's powerplant is technologically obsolete compared to the F100.
emphasis mine
You state that you are an English and multilingual speaker, but is English your native language?  Your posts read like they are AI created.  Seriously, go back and try to read some of your posts out loud.  I bet you are left gasping for air due to the run on sentence structure so prevalent in your posts. 
If you have to go searching for info on a topic, perhaps you shouldn't be posting about that topic.  All us space "outsiders" have the same access to the web that you do.  There's a LOT of trash on the web, don't make NSF.com,
 your dumping ground, please.  If you honestly want to learn, ask questions, there's still quite a few people around who would help you.
Paul

Offline Vahe231991

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Re: Hermeus hypersonic plane
« Reply #63 on: 08/16/2023 03:24 pm »
The post written by me in question isn't a product of artificial intelligence. I never wrote "blah blah blah" because I am both an English speaker and multilingual speaker. I was just commenting on the latest news on development of the Darkhorse because Hermeus Aerospace had to make a decision on what turbofan should be used for the gas turbine part of the Chimera II TBCC engine for the Darkhorse engine because it knows that the J85 turbojet that is part of the Quaterhorse's powerplant is technologically obsolete compared to the F100.

What you wrote here and other places is equivalent to "blah blah blah" because it doesn't add anything of substance to the discussion.   It is just filler.

I mean did the "decision really demonstrate flexibility"?   And if so, why is it necessary to point out here?
I'm emphasizing that Hermeus Aerospace had to make a decision of which jet engine should be used as the gas turbine portion of the Chimera engine, and that because the Chimera II is a bigger engine, it required a larger engine for its gas turbine component. Hermeus Aerospace opted for existing jet engines to serve as the gas turbine components for the Chimera and Chimera II TBCC engines in order to save billions of dollars in research and development costs and years of schedule, and since the Darkhorse design is slightly bigger and faster than the Quarterhorse, I'd imagine that Hermeus Aerospace was looking for an existing jet engine to act as the gas turbine component of the Chimera II that would have a powerful-enough thrust-to-weight ratio to propel the Darkhorse to its planned Mach 5 speed. If the Halcyon is ever built following flight testing of the Darkhorse, Hermeus Aerospace could optimize the Halcyon's TBCC engine to use as the gas turbine component either the F100 or F110.
Again, so what? Did the decision really demonstrate flexibility? 
Both the F-100 and F-110 are multiple decades old engines.  The F-100 was contracted for USN and USAF usage in the F-14/15, both of which entered service in the 1970's.
This decision in some ways demonstrated flexibility because Hermeus Aerospace had to decide whether to use the F100, F110, F119, or a brand new turbofan for the gas turbine portion of the Chimera II TBCC powerplant to be used for the Darkhorse and Halcyon, even though the F100, F110, and F119 have greater power-to-weight ratios that the J85 that is part of the Quarterhorse's Chimera engine. What was the rationale by Hermeus Aerospace for picking the F100 rather than the F110 as the gas turbine component of the Chimera II engine?

Offline Jim

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Re: Hermeus hypersonic plane
« Reply #64 on: 08/16/2023 04:00 pm »
The post written by me in question isn't a product of artificial intelligence. I never wrote "blah blah blah" because I am both an English speaker and multilingual speaker. I was just commenting on the latest news on development of the Darkhorse because Hermeus Aerospace had to make a decision on what turbofan should be used for the gas turbine part of the Chimera II TBCC engine for the Darkhorse engine because it knows that the J85 turbojet that is part of the Quaterhorse's powerplant is technologically obsolete compared to the F100.

What you wrote here and other places is equivalent to "blah blah blah" because it doesn't add anything of substance to the discussion.   It is just filler.

I mean did the "decision really demonstrate flexibility"?   And if so, why is it necessary to point out here?
I'm emphasizing that Hermeus Aerospace had to make a decision of which jet engine should be used as the gas turbine portion of the Chimera engine, and that because the Chimera II is a bigger engine, it required a larger engine for its gas turbine component. Hermeus Aerospace opted for existing jet engines to serve as the gas turbine components for the Chimera and Chimera II TBCC engines in order to save billions of dollars in research and development costs and years of schedule, and since the Darkhorse design is slightly bigger and faster than the Quarterhorse, I'd imagine that Hermeus Aerospace was looking for an existing jet engine to act as the gas turbine component of the Chimera II that would have a powerful-enough thrust-to-weight ratio to propel the Darkhorse to its planned Mach 5 speed. If the Halcyon is ever built following flight testing of the Darkhorse, Hermeus Aerospace could optimize the Halcyon's TBCC engine to use as the gas turbine component either the F100 or F110.
Again, so what? Did the decision really demonstrate flexibility? 
Both the F-100 and F-110 are multiple decades old engines.  The F-100 was contracted for USN and USAF usage in the F-14/15, both of which entered service in the 1970's.
This decision in some ways demonstrated flexibility because Hermeus Aerospace had to decide whether to use the F100, F110, F119, or a brand new turbofan for the gas turbine portion of the Chimera II TBCC powerplant to be used for the Darkhorse and Halcyon, even though the F100, F110, and F119 have greater power-to-weight ratios that the J85 that is part of the Quarterhorse's Chimera engine. What was the rationale by Hermeus Aerospace for picking the F100 rather than the F110 as the gas turbine component of the Chimera II engine?

No, it doesn't.  They just picked the cheapest and available engines.

Offline jdon759

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Re: Hermeus hypersonic plane
« Reply #65 on: 07/25/2024 12:27 am »
What are the differences in approach to precoolers for Hermeus vs Reaction Engines?  (If anyone knows)
Where would we be today if our forefathers hadn't dreamt of where they'd be tomorrow?  (For better and worse)

Offline Spiceman

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Re: Hermeus hypersonic plane
« Reply #66 on: 07/25/2024 05:28 am »
If Hermeus use MIPCC, then they throw oxidizer in front of the turbofan compressors to keep them cool and boost performance. Turbofan thinks it flies at Mach 2 when real velocity is Mach 4+
 
REL precooler use a helium loop, cooled by LH2.
« Last Edit: 07/25/2024 11:32 am by Spiceman »

Offline Asteroza

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Re: Hermeus hypersonic plane
« Reply #67 on: 07/25/2024 07:07 am »
If Hermeus use MIPCC, then they throw oxidizer in front of the turbofan compressors to keep them cool and boost performance. Turbofan thinks it flies at Mach 2 when real velocity is Mach 4+
REL precooler use a helium loop, cooled by LH2.

Given that REL determined near-liquid air was good enough for their purposes, I wonder if that opens the opportunity for using a different cryogen for the heat exchanger, assuming Hermeus is not dumping either water or LOx directly into the stream...

Offline CameronD

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Re: Hermeus hypersonic plane
« Reply #68 on: 07/25/2024 11:13 pm »
Given that REL determined near-liquid air was good enough for their purposes, I wonder if that opens the opportunity for using a different cryogen for the heat exchanger, assuming Hermeus is not dumping either water or LOx directly into the stream...

You have two choices: the fuel or the oxidiser.  To have to handle any other cryogen only adds weight and complexity and for that reason makes absolutely no sense.
With sufficient thrust, pigs fly just fine - however, this is not necessarily a good idea. It is hard to be sure where they are
going to land, and it could be dangerous sitting under them as they fly overhead.

Offline StraumliBlight

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Re: Hermeus hypersonic plane
« Reply #69 on: 09/13/2024 04:08 pm »


Quote
Hermeus has selected Cecil Airport in Jacksonville, Florida for its hypersonic engine test facility. Named HEAT (High Enthalpy Air-Breathing Test Facility), this facility will be Hermeus’ largest and most technologically advanced test site to date and become a national asset for hypersonic testing. The site will also be the initial base for Hermeus’ high-Mach flight test capabilities starting in 2026, expanding cadence and affordability of the nation’s flight test infrastructure.

We announced our plans for the new facility at a groundbreaking ceremony at Cecil Airport in Jacksonville. Hermeus executives and employees were joined by U.S. Congressman Aaron Bean (FL- 04), U.S. Congressman John Rutherford (FL-05), State Sen. Clay Yarborough (R-Jacksonville), Mayor Donna Deegan, Florida Department of Commerce officials, JAXUSA officials, and other community leaders.

The HEAT facility will provide continuous high flow rate, high enthalpy and low-pressure conditions required for high-supersonic and low-hypersonic flight modeling. This capability will make the facility an important asset to more effectively test and field various hypersonic technologies – not only for Hermeus but also for the Department of Defense and its commercial partners. 

Hermeus will test a variety of engines and propulsion subsystems at HEAT – from the Pratt & Whitney F100 engine to Hermeus’ proprietary hypersonic Chimera engine. The facility will be built in phases with initial sea-level static engine tests starting before the end of 2024. Future phases of the facility will introduce continuous high-Mach vitiated air flow to simulate more flight-like high-Mach testing conditions on the ground.

 

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