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Author Topic: Northrop Grumman B-21 Long Range Strike Bomber  (Read 273976 times)

Online SpudmanWP

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Re: Northrop Grumman B-21 Long Range Strike Bomber
« Reply #1425 on: July 27, 2018, 10:55:09 am »
I still say they should adopt the F-35's core avionics
WE4-45-1-08     OMHIWDMB
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Offline LowObservable

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Re: Northrop Grumman B-21 Long Range Strike Bomber
« Reply #1426 on: July 27, 2018, 02:34:43 pm »
I say I'm glad that you're not the one making the decisions...

Online SpudmanWP

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Re: Northrop Grumman B-21 Long Range Strike Bomber
« Reply #1427 on: July 27, 2018, 02:45:07 pm »
Given that NG built the F-35's radar and CNI, it's a no brainier.
« Last Edit: July 27, 2018, 07:22:21 pm by flateric »
WE4-45-1-08     OMHIWDMB
"The early bird gets the worm but the second mouse gets the cheese."

Offline LowObservable

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Re: Northrop Grumman B-21 Long Range Strike Bomber
« Reply #1428 on: July 27, 2018, 03:04:47 pm »
But that's not the core avionics, is it?

I don't think we'll see systems like the F-22 and F-35 again, with an integrated core processor. That was the way it had to be done in the 1980s and 1990s, because the related demands of sensor fusion and LPI/LPD, not to mention real-time blue-line flightpath control, required lots of hardware. You could only fit one supercomputer on the airplane.

Today I can do much more processing "close to the aperture".

Think about it. In 1995, my PC had special cards in it that connected to the printer and the scanner. That's not the way it's done now.

« Last Edit: July 27, 2018, 03:17:43 pm by LowObservable »

Online SpudmanWP

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Re: Northrop Grumman B-21 Long Range Strike Bomber
« Reply #1429 on: July 27, 2018, 03:19:58 pm »
Tightly integrated software based systems are the way forward, plain and simple.

The F-35's ICP is based on VMs and middle-ware which allows for easy hardware & software updates.   They also allow for ease of full data fusion.  Separating the systems, even if you keep them software based, increases cost and decreases interaction due to the transfer of data between the systems.  Imagine if you took a modern PC and separated each app out to their own micro PC.  The cost would be horrendous in money, electricity, heat, space, etc.  Btw, I don't think the F-35's ICO is as tightly wound as the F-22s  Much of it is separated into individual VMs so that it's more fault tolerant the the F-22's.  IIRC there are even redundancies built into the back-plane and power subsystems of the ICP to guard against any one single point of failure.  Even the display is actually two independent displays, side by side.  There is also not a single CPU, but multiple CPU cards that run the VMs as needed.  A failure in one will be picked up by the others.

Another example is NG's CNI.  It can emulate virtually any radio signal you want as long as the antenna can support the waveform.  Imagine the space, heat, electricity, etc that all those radios would have cost if done separately.

It's funny that you mention the PCs of old because that is exactly what you are suggesting they do.

Another couple reason for reusing the F-35's avionics:
  • They are already developed
  • Future upgrades will already be paid for
  • They can share the same Mission Data Files
« Last Edit: July 27, 2018, 03:28:00 pm by SpudmanWP »
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Offline PaulMM (Overscan)

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Re: Northrop Grumman B-21 Long Range Strike Bomber
« Reply #1430 on: July 27, 2018, 08:31:14 pm »
Removed two posts which had descended the debate to mudslinging.

The software developers where I work had a massive ideological fight between monolithic and microservice software architectures a few years ago which resulted in a service actually called "xxxxx-monolithic-services".

There is no right or wrong answer; each development methodology has advantages and disadvantages, so you choose depending on application purpose, company development and release methodologies...

The same is true of distributed versus centralised hardware architectures.
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Offline XP67_Moonbat

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Re: Northrop Grumman B-21 Long Range Strike Bomber
« Reply #1431 on: July 28, 2018, 06:53:24 pm »
Was Scott involved? 😛😛
In God we trust, all others we monitor. :-p

Offline RavenOne

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Re: Northrop Grumman B-21 Long Range Strike Bomber
« Reply #1432 on: August 24, 2018, 06:14:59 pm »
 
Saw this on the Aviationist page, of three contributors who took night shots of Edwards  recently citing what they saw is not a B-2 Spirit but could be the new B-21...because of x,y,z.

Cheers

https://theaviationist.com/2018/08/24/whats-this-mysterious-aircraft-spotted-at-edwards-afb-the-secretive-b-21-raider-the-rq-180-drone-or-just-a-b-2/



Offline Sundog

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Re: Northrop Grumman B-21 Long Range Strike Bomber
« Reply #1433 on: August 24, 2018, 06:23:12 pm »
Looks like a B-2 to me. There isn't a clear enough image to say otherwise.

Offline flateric

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Re: Northrop Grumman B-21 Long Range Strike Bomber
« Reply #1434 on: August 24, 2018, 07:03:01 pm »
How to write several pages of sighting a plane that even not passed CDR...

"There are many disbelievers in
stealth, more than a few of them truly technically ignorant and proud of it." Sherm Mullin, Skunk Works

Offline sublight is back

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Re: Northrop Grumman B-21 Long Range Strike Bomber
« Reply #1435 on: August 24, 2018, 07:28:33 pm »
Tightly integrated software based systems are the way forward, plain and simple.


Hypervisors on Intel hardware, that Russian hackers are REALLY good at. How long till somebody dumps the flash, doesn't protect it, Russian hackers grab it, and have it running on their own hypervisor in the Kremlin? It wont be long after that it ends up in Beijing.

Offline Flyaway

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Re: Northrop Grumman B-21 Long Range Strike Bomber
« Reply #1436 on: August 25, 2018, 03:30:57 am »
How to write several pages of sighting a plane that even not passed CDR...

Because of course they would never fudge the timescales on a grey project.

That said I doubt they’d park anything other than a B-2 out to be caught on a commercial reconnaissance satellite.
« Last Edit: August 25, 2018, 03:34:47 am by Flyaway »

Offline RavenOne

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Re: Northrop Grumman B-21 Long Range Strike Bomber
« Reply #1437 on: August 25, 2018, 05:12:10 am »
How to write several pages of sighting a plane that even not passed CDR...

Because of course they would never fudge the timescales on a grey project.

That said I doubt they’d park anything other than a B-2 out to be caught on a commercial reconnaissance satellite.

How to write several pages of sighting a plane that even not passed CDR...

In this speech, BG Schaefer ( CO of 412th TEst Wing) hints that the Raider be coming to Edwards soonish.

Cheers

http://www.thedrive.com/the-war-zone/18997/b-21-raider-officially-heading-to-edwards-air-force-base-for-testing

Offline FighterJock

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Re: Northrop Grumman B-21 Long Range Strike Bomber
« Reply #1438 on: August 25, 2018, 07:10:42 am »
How to write several pages of sighting a plane that even not passed CDR...

Because of course they would never fudge the timescales on a grey project.

That said I doubt they’d park anything other than a B-2 out to be caught on a commercial reconnaissance satellite.

How to write several pages of sighting a plane that even not passed CDR...

In this speech, BG Schaefer ( CO of 412th TEst Wing) hints that the Raider be coming to Edwards soonish.

Cheers

http://www.thedrive.com/the-war-zone/18997/b-21-raider-officially-heading-to-edwards-air-force-base-for-testing

How soon would that be?  End of the year soon?  And another thing would they also reveal what the B-21 looks like at the time of the first flight.

Offline flateric

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Re: Northrop Grumman B-21 Long Range Strike Bomber
« Reply #1439 on: August 25, 2018, 07:45:51 am »
In this speech, BG Schaefer ( CO of 412th TEst Wing) hints that the Raider be coming to Edwards soonish.

Cheers

http://www.thedrive.com/the-war-zone/18997/b-21-raider-officially-heading-to-edwards-air-force-base-for-testing

Where in his speech do you see any hints to conclusions that were made about 'sooner than it was expected'? And sooner than what exactly?

Quote
"For the first time ever, I would like to publicly announce that the B-21 will be tested at Edwards Air Force Base... Edwards has been the home of bomber test and now we also can publicly release that the B-21 is coming to Edwards and we will be testing it here in the near future."
« Last Edit: August 25, 2018, 08:50:36 am by flateric »
"There are many disbelievers in
stealth, more than a few of them truly technically ignorant and proud of it." Sherm Mullin, Skunk Works