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B-2: The Spirit of Innovation - 100 page PDF 6.6Mb

Unread postPosted: 29 Dec 2017, 11:11
by spazsinbad
B-2: The Spirit of Innovation
29 Dec 2017 Aviation Archives

"A Northrop company produced brochure on the B-2 Bomber. Written by Rebeccxa Grant. Dated May 2013. The history & development of the Northrop Grumman B-2 bomber project. Credit: Bill Simone" [more about VLO than you need to know]

Cover Photo: https://lh3.googleusercontent.com/-jYfo ... vation_013

PDF: https://www.filefactory.com/file/7ancr6 ... vation.pdf (6.6Mb)

Source: http://aviationarchives.blogspot.com.au ... ation.html

Re: B-2: The Spirit of Innovation - 100 page PDF 6.6Mb

Unread postPosted: 23 Jan 2018, 04:11
by popcorn
Article on the B-2 and the extensive use of composites in it's construction. Includes a remarkable video of the wings flexing in flight.

https://theaviationist.com/2017/12/29/t ... -it-means/

This remarkable video of a Northrop Grumman B-2 Spirit stealth bomber undergoing wing flutter testing on June 14, 1995 is fascinating for a number of reasons.

All aircraft wings have a remarkable capacity for flex. But one of the most significant changes in aircraft engineering in the last three decades has been the addition of composite materials, especially carbon fibers, into aircraft structural design. In many cases these composite materials have replaced metal alloys in structural components on advanced aircraft.

The B-2 Spirit is approximately 80% composite, mostly carbon fiber. Some of the structural framework internal to the B-2, especially where the wing blends into the fuselage and the largest fuel tanks are located, is titanium and aluminum. While part of the reason for this is structural, another reason is that composites, being made up of a number of different elements, can have radar absorbent materials included in their manufacture or “lay-up” during the process of combining materials into a composite.

There are many reasons composite materials, or materials made up of a combination of advanced materials including metals, polymers (plastics) and carbon atoms at the most elemental level, have become so common in aviation engineering.

Re: B-2: The Spirit of Innovation - 100 page PDF 6.6Mb

Unread postPosted: 02 Feb 2019, 09:28
by marsavian
Students from Knob Noster High School near Whiteman Air Force Base, Missouri, designed this plastic cover for an important switch box inside the B-2 Spirit bomber to help prevent accidental flight emergencies The cover now is used in all operational B-2s at Whiteman, as well as the aircraft's simulators.

https://www.stripes.com/news/students-d ... s-1.566742

Image

Re: B-2: The Spirit of Innovation - 100 page PDF 6.6Mb

Unread postPosted: 07 Feb 2019, 17:42
by marsavian
New Air Force B-2 "Earth Penetrating" Nuclear Weapon Changes Combat Strategy

https://defensemaven.io/warriormaven/ai ... mMmzEegDg/

The B61 Mod 12 is engineered with a special “Tail Subassembly” to give the bomb increased accuracy, giving a new level of precision targeting using Inertial Navigation Systems, Kristensen said.

“Right now the B-2 carries only B61-7 (10-360 kt), B61-11(400 kt, earth-penetrator), and B83-1 (high-yield bunker-buster). The B61-12 covers all of those missions, with less radioactive fallout, plus very low-yield attacks,” he added.

The evidence that the B61-12 can penetrate below the surface has significant implications for the types of targets that can be held at risk with the bomb.

By bringing an “earth-penetrating” component, the B61-12 vastly increases the target scope or envelope of attack. It can enable more narrowly targeted or pinpointed strikes at high-value targets underground - without causing anywhere near the same level of devastation above ground or across a wider area.

“A nuclear weapon that detonates after penetrating the earth more efficiently transmits its explosive energy to the ground, thus is more effective at destroying deeply buried targets for a given nuclear yield. A detonation above ground, in contrast, results in a largler fraction of the explosive energy bouncing off the surface,” Kristensen explained.

The B-2 is getting improved digital weapons integration, new computer processing power reported to be 1,000-times faster than existing systems and next-generation sensors designed to help the aircraft avoid enemy air defenses ...

Re: B-2: The Spirit of Innovation - 100 page PDF 6.6Mb

Unread postPosted: 07 Feb 2019, 18:40
by sferrin
Now they just need to stuff a W83 into a MOP casing.

Re: B-2: The Spirit of Innovation - 100 page PDF 6.6Mb

Unread postPosted: 08 Feb 2019, 07:48
by element1loop
A 700 lb bomb casing that goes lets say 20 m deep isn't going to shock-couple much with the surrounding soil and rocks. Not useless but also not that much better than a ground-burst. But what it should result in is a cloud that doesn't go as high, plus throws out a lot more highly radioactive dirt and rock within 1 kilometer than a ground burst would, which is maybe part of the intent. That would work great against a naval base, air base, tank farm or a sprawling weapon factory, or even an underground factory, to put it out of action. While limiting the damage radius.

Re: B-2: The Spirit of Innovation - 100 page PDF 6.6Mb

Unread postPosted: 08 Feb 2019, 12:47
by sferrin
element1loop wrote:A 700 lb bomb casing that goes lets say 20 m deep isn't going to shock-couple much with the surrounding soil and rocks. Not useless but also not that much better than a ground-burst. But what it should result in is a cloud that doesn't go as high, plus throws out a lot more highly radioactive dirt and rock within 1 kilometer than a ground burst would, which is maybe part of the intent. That would work great against a naval base, air base, tank farm or a sprawling weapon factory, or even an underground factory, to put it out of action. While limiting the damage radius.


But a 28,000lb case with 1-2 Mt of sunshine in the front might. :-) With a nuclear package the case itself could be much narrower in diameter, with a subsequent increase in penetration. (MOP supposedly is already good for 200+ feet in hard dirt.) Right now, MOP is closer to "Amazon" than "Disney":

Slide4.JPG


Current MOP penetrator could probably be narrower with the nuke:

279630.jpg


B83

CJZhuDaUMAA3LgK.jpg

Re: B-2: The Spirit of Innovation - 100 page PDF 6.6Mb

Unread postPosted: 08 Feb 2019, 13:42
by element1loop
sferrin wrote:
element1loop wrote:A 700 lb bomb casing that goes lets say 20 m deep isn't going to shock-couple much with the surrounding soil and rocks. Not useless but also not that much better than a ground-burst. But what it should result in is a cloud that doesn't go as high, plus throws out a lot more highly radioactive dirt and rock within 1 kilometer than a ground burst would, which is maybe part of the intent. That would work great against a naval base, air base, tank farm or a sprawling weapon factory, or even an underground factory, to put it out of action. While limiting the damage radius.


But a 28,000lb case with 1-2 Mt of sunshine in the front might. :-) With a nuclear package the case itself could be much narrower in diameter, with a subsequent increase in penetration. (MOP supposedly is already good for 200+ feet in hard dirt.) Right now, MOP is closer to "Amazon" than "Disney":

Slide4.JPG


Current MOP penetrator could probably be narrower with the nuke:

279630.jpg


B83

CJZhuDaUMAA3LgK.jpg


:mrgreen: Yes, that would do it ... I'm wondering what you want to hit with >1.2 Mt? :mrgreen:

Perhaps a very narrow case (~600 mm), hard-tipped, full of DU for the mass, with a rocket booster, but still short enough to fit in the B21's weapon bay. That should get it done. :devil:

Re: B-2: The Spirit of Innovation - 100 page PDF 6.6Mb

Unread postPosted: 12 Feb 2019, 03:57
by Corsair1963
Crazy idea but considering the USAF plans on retiring the B-2. Could they be converted to a long range Stealthy Tanker??? Wouldn't be a cheap option and limited numbers. Yet, they're available and could offer considerable value in the role!

Re: B-2: The Spirit of Innovation - 100 page PDF 6.6Mb

Unread postPosted: 12 Feb 2019, 18:27
by marsavian
Not a bad idea. Plenty of fuel and stealth and ESM/ECM. Change the weapons bay to fit a recessed boom and perhaps even more fuel and you are good to go. Probably very expensive to maintain and who knows how much service life they have left but still not a dumb idea because you would only need it to get safely just outside a target's known defences.

Re: B-2: The Spirit of Innovation - 100 page PDF 6.6Mb

Unread postPosted: 13 Feb 2019, 02:21
by Corsair1963
marsavian wrote:Not a bad idea. Plenty of fuel and stealth and ESM/ECM. Change the weapons bay to fit a recessed boom and perhaps even more fuel and you are good to go. Probably very expensive to maintain and who knows how much service life they have left but still not a dumb idea because you would only need it to get safely just outside a target's known defences.


Well, could be a short term option. As I am sure it would be an expensive under taking. Yet, when you need tanker support up close to accomplish a critical mission. It maybe worth the cost....