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Showing posts with label B-2 Bomber. Show all posts
Showing posts with label B-2 Bomber. Show all posts

Wednesday, December 30, 2015

The U.S. Military's $1,000,000,000,000 Question: Is Stealth Worth It?


Is the added cost of buying and operating a stealth fighter worth it?
The answers will vary depending on who you ask—and it depends on if one believes stealth is a baseline requirement to survive over a future battlefield or not.
The U.S. Air Force has publicly embraced stealth as the end all and be all, while the U.S. Navy has taken a more skeptical approach. While Air Force officials publicly pronounce that the F-35 will be able fight alone and unafraid, the Navy has argued for balanced survivability using a combination of assets including electronic attack, stand-off weapons and, yes, some measure of stealth.
Part of the difference in the two services’ diverging positions can be explained by different political messaging strategies. Publicly, the Air Force doesn’t want to admit the utility of electronic attack or support platforms because they seem to believe that might erode support for the F-35. Meanwhile, the Navy has bills to pay other than for aviation and that service doesn’t see the performance differential between the F/A-18E/F and F-35C as being worth the massive cost plus up.
After a discussion with Air Force and Navy officials—it’s apparent that the truth lies somewhere in between. There is consensus that in the future as anti-access/area denial threats evolve, wide-band all-aspect stealth will probably be necessary. But that likely requires a large flying-wing aircraft like a strategic bomber. Moreover, support assets including electronic attack and cyber are going to be part of the mix. Against the Chinese or Russians, no one is going to be able to go it alone.
A dispute starts to emerge on the advantages of high-frequency stealth aircraft—jets like the F-22 and F-35 which are designed to operate primarily against the C, X and Ku band radars. Navy leaders are adamant that the service needs complementary capabilities that include stealth as part of a larger overall bag of tricks. Meanwhile, Air Force leaders will assert that the F-35 in particular will operate without the support of any external electronic warfare assets. However, the service’s own air warfare experts at Nellis AFB, Nev., freely admit that stealth works best when complemented with other capabilities like electronic attack—and those officers recognize the need for a platform like the EA-18G Growler. Detection via radar is decided by the signal to noise ratio—stealth reduces the signal while jamming increases the noise. That’s just basic physics—ideally, one works both sides of the problem to achieve the best results.
At the tactical level—as I recently discussed with a good friend who is an Air Force Weapons School grad with lots of stealth experience—a four-ship of F-35Cs supported by Growlers and E-2D Advanced Hawkeyes and other naval assets is likely to be more effective than a four-ship of Super Hornets operating with the same support assets. While the F-35C does not have good kinematic performance, it does (or will eventually) have stealth, excellent sensors and phenomenal electronic warfare capabilities. Indeed, combining the F-35C with the Super Hornet might work very well in a scenario where the Joint Strike Fighter is used as a spotter for the F/A-18E/Fs. Indeed, the Navy’s director of air warfare Rear Adm. Mike Manazir told me as such a couple of years ago when I was at the U.S. Naval Institute.
But the problem for the Navy is that the F-35C is expensive both to buy and sustain onboard a carrier. There are many in the Navy that simply don’t believe that any added performance benefits the F-35C brings to the table would be worth the massive additional cost. Moreover, there is a growing understanding in the naval community that the F-35C fundamentally does not have the range or payload needed to keep the carrier relevant in the anti-access/area denial environment of the Western Pacific. Indeed, there have been suggestions that the Navy truncate or cancel its portion of the Joint Strike Fighter buy. But only time will tell…
Dave Majumdar is the defense editor for The National Interest. You can follow him on Twitter: @davemajumdar.
Image: Northrop Grumman/Social Media. 

http://nextbigfuture.com/

Full scale or miniature prototypes of the long range strike bomber may have already been built for testing


Prototypes of new US long range strike bombers may already have been built and tested after it was revealed that spending on the project has jumped to $1 billion in 2015.

The U.S. Air Force is moving forward with plans for a top-secret next generation bomber that could one day fly without a pilot.

Spending on the project has topped a billion dollars this year alone - and companies vying to win a contract to build the bombers are already said to have built either full-scale or miniature prototypes and tested them in wind tunnels.

Spending on the long range bomber was $200 million in 2012.
A billion dollars has been spent in 2015.
Spending could increase to $3 billion in 2018.

100 brand-new bombers will hopefully cost as $55 billion in total. They will replace 1960s-vintage B-52s and B-1s from the ’80s.













A VH-71 helicopter

New Pentagon Equipment Is No Longer Pushing the Envelope


For the past six years, a newly cost-conscious Pentagon has aimed to buy arms that are less complex and use more existing or commercial technology. And it’s worked. The cost of major projects is dropping, says Frank Kendall, the defense undersecretary for acquisition. And he has the data to prove it.
But the bad news, Kendall says in a new 210-page report, is that Pentagon arms buyers have become so risk-adverse that America’s cutting-edge weapons aren’t quite so cutting-edge. And that’s allowing China and Russia to catch up.
“In my view, our new product pipeline is not as robust as it should be at a time when our technological superiority is being seriously challenged by potential adversaries,” Kendall said in his report, which analyzes the state of Pentagon’s massive, multibillion-dollar acquisition establishment.
He’s not alone. Last month at a military conference in London, the Dutch air force chief called out the U.S. Army’s effort to build future helicopters, saying it doesn’t push the envelope enough. Lt. Gen. Alexander Schnitger declared that the two primary designs now being evaluated are unambitious and could fall far short of what NATO needs to win a war in 2040.
Kendall has been sounding the alarm that the U.S. military’s technological superiority over its potential foes is narrowing, particularly when it comes to new Chinese equipment.
“In some areas we may not be pushing the state-of-the-art enough in terms of technical performance,” he wrote.
Historically, big Pentagon weapons programs have been susceptible to “requirements creep,” the accretion of program goals that have slowed development and sent costs skyward. The VH-71 effort to replace Marine One — the presidential helicopter — fell apart in large part because the requirements were still being changed even as aircraft were being built.
To fix this, Kendall and others have instituted changes — under the broad name of Better Buying Power that locked down program requirements early on. But in a rapid-changing world, and with U.S. weapons-development timelines still measures in years, Kendall’s new report seems to question whether locking in requirements early is the best way to proceed.
Now he argues that not all cost growth is bad, particularly when it responds to a global threat.
“Simply delivering what was initially required on cost and schedule can lead to failure in achieving our evolving national security mission — the reason defense acquisition exists in the first place,” he writes.
On the flip side, Kendall says, many of the acquisition reforms put in place by him and his predecessor, current Defense Secretary Ashton Carter, are working. Defense firms are making more profit based on performance and companies are “doing a better job of meeting cost targets.”
An initiative called “should-cost,” appears “to be taking hold,” which is a “major cultural change,”  Kendall wrote. Should-cost “requires our managers to actively seek ways to save money and to set targets for doing so, not just to stay within their budgets,” he said.
Shay Assad is the director of defense pricing — the person who determines what projects should cost the Pentagon. He cited a “space-related procurement” in which the Pentagon saved $900 million in a single year. In another project, the Pentagon saved more than $2 billion over a five-year period.
“We’ve saved billions of dollars, I know we have,” Assad said.
In a certain helicopter deal, the Pentagon entered negotiations predicting that a multiyear contract might save 10 percent; instead, they squeezed 20 percent out, he said.
“What we’re trying to get the companies to focus on is accepting challenging, but doable cost,” Assad said in a July interview. “Those companies that are, they’re making more profit.”
Kendall’s report found that subcontractors to major firms are making a higher percentage of profit than the company’s they are supplying. “Since 2001, first-tier subcontractors earned higher margins than their associated prime contractors on the same program,” he wrote.
The report also fired shots at lawmakers — including Sen. John McCain, R-Ariz., chairman of the Senate Armed Services Committee — who have proposed to give more acquisition power to the uniformed service chiefs. After 2017, according to the proposed legislation, new major projects would be overseen by the military services, while the defense undersecretary for acquisition would thereafter control only joint projects or service-specific ones the defense secretary delegates.
McCain and supporters of his legislation argue the changes add accountability to acquisition projects. Kendall says the data in his report shows that Better Buying Power is working and that lawmakers shouldn’t just make change to make change.
“I encourage the stakeholders of defense acquisition to examine this report, prior reports, and other data-driven analyses to help guide ongoing discussions and policymaking,” he said. “While it is important to continue improving our policies and practices, change for change’s sake isn’t the answer. We should use experience supported by data-driven analysis to help ensure we don’t embrace policy reforms that carry unintended adverse consequences.”

Microwave absorbing circuit can enhance plane stealth


A team of Chinese researchers have made a breakthrough in stealth plane technology that could be so significant even local military sources say it should be kept out of the public realm.

The team released the technical and design details of an “invisibility circuit” they claim has the potential to help aircraft trick the best early warning systems in use today.

The researchers are affiliated with the Huazhong University of Science and Technology in Wuhan in central China’s Hubei province.

According to their paper, they have created a multi-layer electrical circuit that can “trap” microwaves at ultra-high frequencies, thus confusing radar systems and enabling aircraft to sneak past them















What is unique about the latest finding is that the material used to create the circuit would be almost impossibly thin. At under one centimeter, it is just a tenth the size of similar products developed by overseas competitors. This means it could be used to coat planes for the first time, pundits say.

Stealth planes including the F-22 and F-35 used by the US military are not quite as evasive as they sound, according to Huang, who said they can be spotted by advanced radar systems even from a considerable distance.

Such radars typically use microwaves at strengths of 2 gigahertz or lower to identify and track stealth aircraft. This is because the currently available coating materials can only absorb electromagnetic waves at high frequencies. Jiang’s team said the new circuits hit the military’s sweet spot as they can absorb waves ranging from 0.7Ghz to 1.9Ghz.

Many similar projects are kept under wraps because of their implications for national security and national defence. Some are supported by military funding, which prohibits their public disclosure.

The new circuit is not without problems.

First, it is unable to absorb microwaves generated at frequencies of 2Ghz or above, meaning that it could still be spotted by advanced radar systems, some of which can operate at over 40 Ghz.
As such, it could take years before it is used on an actual aircraft, Huang said.
It may initially be applied as an undercoat beneath other cutting-edge paints that are already used on stealth planes, he added.

The National Interest

Winning the Airwaves: Sustaining America's Advantage in the Electromagnetic Spectrum

The comfort of a post–Cold War advantage has left America lagging.
The electromagnetic spectrum (EMS) is one of the most critical domains in modern warfare. While militaries have long used it to communicate, keep track of friendly forces and find and target enemies, emerging technological advances now promise to dramatically change how they will use the EMS in the future. In the same way that smartphones and the Internet are redefining how the world shares, shops, learns and works, new sensors and networking technologies will enable militaries to gain significant new advantages over competitors that fail to keep pace.
Unfortunately, “failed to keep pace” is an appropriate description of the Pentagon’s investments in EMS warfare capabilities over the last generation. In the absence of a peer rival following the end of the Cold War, DoD failed to pursue a new generation of capabilities needed to maintain its EMS superiority. This pause provided China, Russia and other rivals with an opportunity to field systems that target vulnerabilities in sensor and communication networks the U.S. military has come to depend on. As a result, America’s once significant military advantage in the EMS is eroding, and may in fact no longer exist. This does not have to remain the case. DoD has the opportunity to develop new operational concepts and technologies that will allow it to “leap ahead” of its competitors and create enduring advantages in EMS warfare.
A Long-Term Competition:
The ways in which militaries conducted EMS warfare have changed significantly over the last hundred-plus years. We can think of these changes as a series of major phases, each of which placed a different emphasis on the use of active or passive EMS capabilities and countermeasures. Within each phase, incremental improvements to existing EMS capabilities allowed militaries to gain temporary advantages over their competitors. These advantages dissipated as the other side developed the next generation of countermeasures. More enduring advantages were the product of new operational concepts and capabilities that enabled militaries to transition to a new phase of the EMS warfare competition before their rivals.
For example, in the waning years of the Cold War, the U.S. military began this type of leap by embracing technologies that would reduce the detectability of U.S. forces in the EMS, such as stealth and low probability of interception/low probability of detection (LPI/LPD) sensors and communication systems. This transition promised to give U.S. forces a distinct advantage over Soviet forces that continued to rely on high-power sensors, communications systems and jammers. It was never completed, however, due to the dissolution of the Soviet Union. Following the end of the Cold War, DoD truncated a number of key programs intended to support this transition, including those building stealth B-2 bombers and F-22 fighters.
Today, the Pentagon has an opportunity to gain an enduring advantage over America’s enemies by finishing the transition to the next phase of the EMS warfare competition. A shorthand way of describing this new approach would be “low-to-no power” EMS warfare, where emissions from sensors, communication systems, jammers and major platforms that must operate in contested areas minimize their detectable emissions. This should be one focus of a “Third Offset” strategy that is intended to use new technologies to defeat the numerical and geographic advantages of potential enemies. If embraced by DoD’s leadership and funded by Congress, new operational concepts and capabilities for this next phase in EMS warfare would help the U.S. military to take back the airwaves and dominate this critical domain in which future wars may be won or lost.
New Operational Concepts:
The shift should begin with the creation of new operational concepts that inform DoD’s future capability requirements and investment priorities. Without operational concepts that describe new ways of fighting, the military services will not be able to update their doctrine, and the acquisition system cannot be prompted to incorporate new technologies. The Services are already pursuing some operational concepts for low-to-no power EMS warfare. The Navy, for instance, is developing tactics for E/A-18G Growler electronic attack aircraft to use passive capabilities, in order to geolocate threat emitters alone or in concert with other aircraft through the Navy Integrated Fire Control (NIFC) network.
Other concepts that would apply more broadly across the joint force and for a wider range of missions and scenarios in the low-to-no power EMS warfare regime include using passive and multi-static detection capabilities to find hostile forces while avoiding detection by their active and passive sensors; taking advantage of enhanced emissions control and low-power countermeasures to avoid detection while operating inside contested areas; and using a new generation of jammers, decoys and even directed energy weapons to support U.S. strikes and attack the enemy.
New Technologies:
Executing these new operational concepts will require the U.S. military to evolve and expand its portfolio of EMS capabilities. To operate effectively in a low-to-no power EMS warfare environment, DoD will need capabilities that are highly networked; able to “maneuver” across the EMS in order to remain undetected and target enemy networks; have the capacity to perform multiple EMS warfare functions such as communications, sensing, jamming, deception or decoying; and are small and cheap enough to be deployed on nearly every platform that must operate in contested areas. Most importantly, U.S. EMS warfare systems will need to be controlled by adaptable and intelligent processors that go beyond simply executing automated pre-planned responses and can develop techniques to sustain U.S. EMS operations while disrupting those of the enemy.
Some systems with these attributes are already in the U.S. military’s inventory or will be fielded in the next several years, such as the APG-77 and APG-81 radars on the F-22 and F-35, Air and Missile Defense Radar, Next Generation Jammer and SLQ-32 Surface Electronic Warfare Improvement Program (SEWIP) upgrade. Other potential capabilities are languishing in research and development due to a lack of new, validated requirements and other barriers that inhibit their transition into DoD’s acquisition system.
Overcoming Barriers:
Operating concepts and capabilities similar to those suggested above would help DoD to transition to the low-to-no power phase of EMS warfare. For this transition to occur, however, DoD will first need to address major conceptual, organizational and programmatic impediments to progress that derive from the lack of an institutional vision for how U.S. forces should fight in the EMS.
For instance, technologists, operators and policy makers often do not communicate effectively regarding the potential for emerging technologies to enable new approaches to warfare. While some in DoD are beginning to develop new concepts for the next phase in the EMS warfare competition, their efforts are hindered by the U.S. military’s continued emphasis on operating as it has in the past, rather than embracing new ways of operating and fighting in the EMS.
The lack of new operational concepts has inhibited DoD’s development of formal requirements that would “pull” new EMS warfare technologies into its acquisition process. Moreover, new systems that could support low-to-no power operations that are already fielded, such as active electronically scanned array (AESA) radars, are prized more for their ability to support old operational concepts rather than their potential to enable different approaches to EMS warfare.
The Pentagon could overcome these barriers with a concerted effort initiated and overseen by the new Electronic Warfare Executive Committee (EXCOM). The EXCOM should oversee the development and implementation of a new vision for how future U.S. forces will operate and fight in the EMS. This vision should guide the efforts of the Services and Defense Agencies to develop low-to-no power EMS warfighting operating concepts and requirements.
To ensure the services are able to implement these new approaches to EMS warfare, DoD should prioritize its research and development investments to further mature networking, agility, multifunctionality, miniaturization and adaptability technologies. And to enable these technologies to transition, the Services should greatly increase cooperation between multiple executive and management offices now responsible for developing and procuring new EMS warfare systems. This would help DoD as a whole to field more agile, multifunction capabilities essential to future EMS warfare operations.
American and allied military forces have gained significant advantages over their enemies in previous EMS warfare competitive regimes. A failure to develop new operational concepts and capabilities needed for this next phase of EMS warfare, however, could result in situations where the U.S. military will be at risk of losing the battle for the airwaves.
Bryan Clark and Mark Gunzinger are Senior Fellows at the Center for Strategic and Budgetary Assessments (CSBA).
Image: Wikimedia Commons/U.S. Navy

Electronic Warfare version of China J-16 twin seat fighter similar to USA EA-18 Growler


A possible new electronic warfare (EW) variant of the Shenyang Aircraft Corporation (SAC) J-16 twin-seat strike fighter made its first flight on 18 December, according to Chinese sources, potentially adding a significant offensive capability to the People's Liberation Army Air Force (PLAAF).

Images of the new variant have emerged on several Chinese military web pages, including a 21 December 2015 video report on the popular Ifeng web page. The most salient modifications are two new wingtip pods similar to the Northrop Grumman AN/ALQ-218 Tactical Jamming Receiver, leading to comparisons with the E/A-18G Growler electronic attack variant of Boeing's Super Hornet.

The Boeing EA-18G Growler is an American carrier-based electronic warfare aircraft, a specialized version of the two-seat F/A-18F Super Hornet.

 
EA-18 Growler

This possible J-16 EW prototype appears to lack the usual fuselage-mounted gun and the infrared search and tracking system (IRST) also appears to be missing, but the J-16, which resembles the Russian Sukhoi Su-30, would have up to 10 wing and fuselage hardpoints for ordnance and active jamming pods.

An EW version of the J-16 equipped similarly to the E/A-18G would give PLAAF strike packages a far greater chance of reaching their targets and avoiding increasingly capable air defences.

Development of a J-16 EW variant could also lead to a similar carrier warfare version of the twin-seat J-15S.

While in early 2014 an Asian government source estimated that 100 J-16s would be in PLA service by 2020, the emergence of an EW version could increase that number.

A new electronic warfare variant of the SAC J-16 reportedly first flew on 18 December 2015. Source: Via Chinese Internet


A close-up of the new electronic warfare pod on the wingtips of the SAC J-16 shows a similarity to the Northrop Grumman AN/ALQ-218 Tactical Jamming Receiver. (Via Ifeng web page)



The National Interest

Revealed: U.S. Navy's Plan to Defeat Russia's Deadly S-400

The U.S. Navy has decided to upgrade its Boeing EA-18G Growler fleet with the new high-speed Tactical Targeting Network Technology (TTNT) datalink and other new hardware following a successful demonstration of the new technologies at Fleet Experiment 2015 this summer. According to Boeing, all new Growlers currently in production will be fitted with the enhanced hardware while older jets will be retrofitted the new standard.
“This enhanced targeting capability provides our aircrews with a significant advantage, especially in an increasingly dense threat environment where longer-range targeting is critical to the fight,” said Capt. David Kindley, U.S. Navy F/A-18 and EA-18G program manager.
The enhanced hardware would allow multiple Growlers to coordinate their efforts against ever more capable enemy systems that proliferating around the world as part of the Naval Integrated Fire Control-Counter Air (NIFC-CA) battle network. According to Boeing, the upgrades include an advanced targeting processor, high-bandwidth datalink and a Windows-based tablet, which is integrated with the Growler’s mission system. The new upgrades are necessary to keep paces with an ever-changing threat environment.
“The complexity of global threat environments continues to evolve,” said Dan Gillian, Boeing F/A-18 and EA-18G programs vice president. “This long-range targeting technology is essential as we advance electronic attack capabilities for the conflicts of today and tomorrow.”
The Navy’s decision to upgrade the Growler fleet comes after the Fleet Experiment 2015 exercise validated the service’s concept to use multiple EA-18Gs to generate a “weapons quality track” against enemy emitters. Under the NIFC-CA construct, Rear Adm. Mike Manazir, the Navy’s director of air warfare, told me in December 2013 that the service would need a minimum of two airborne EA-18Gs linked via a high-speed datalink both to each other and to a third point—a Northrop Grumman E-2D Hawkeye—to perform a time distance of arrival analysis to precisely locate threat emitters.
With the three separate points, the Navy expects to be able to narrow down the location of multiple mobile threat emitters to a narrow enough “ellipse” as to generate a weapons quality track in real time. The tactic works best when there are three Growlers working in conjunction with each other—but an E-2D Advanced Hawkeye can substitute for one of the EA-18Gs. While the Hawkeye has an excellent electronic support measures suite, it has neither the capability of the EA-18G nor can it get as close to the threat.
The new technique is essential to the Navy’s plans to fight in a threat environment dominated by advanced integrated air defense systems that could include VHF radars better capable of tracking stealth aircraft and highly mobile double-digit surface-to-air missile (SAM) systems like the Russian–built S-400 Triumf (SA-21 Growler) or Chinese HQ-9.
Older techniques to suppress or destroy enemy air defenses relied on satellite imagery and long-range intelligence gathering aircraft to develop an order of battle for fixed enemy SAM sites. Those techniques are not effective against these newer, more mobile threats.
Dave Majumdar is the defense editor for the National Interest. You can follow him on Twitter: @davemajumdar.
Image: Flickr/U.S. Naval Forces Central Command

 http://nextbigfuture.com/

Russia is using french missile technology to develop hypersonic missiles and Russia could also deploy anti-hypersonic missile defense by 2019


Russia is using French missile technology to develop a new, ultra-high speed nuclear attack missile, the House Armed Services Committee disclosed this week.

According to the document, which is labeled “unclassified,” the graphic reveals how the French defense company MBDA Missile Systems and ONERA, the French national aerospace research center, are working with Raduga, a Russian missile manufacturer, and Rosoboronoexport, the Russian state arms company, to develop a hypersonic missile capable of reaching speeds of Mach 4 to Mach 8, or 3,069 miles per hour to 6,138 miles per hour.

Rogers said the hypersonic vehicle appears to be “a new nuclear weapon delivery system,” and questioned retired Air Force Gen. C. Robert Kehler, a former commander of the U.S. Strategic Command, about the weapon.

“In general terms, I would be concerned about technology transfer to any potential adversary,” Kehler said. “Whether Russia is an enemy is open for some conversation but I would be very concerned about technology transfer to any of the potential adversaries.”

The chart describes the flight test sequence of a Russian jet-powered hypersonic missile launched from a Tu-22 bomber and initially powered by a first stage derived from an “A84” missile.

After accelerating, the jet-powered missile flies for between 20 and 30 seconds at Mach 4 to Mach 8 over a distance of up to 25 miles before crashing. The missile send telemetry signals to an airborne receiver during the flight.


Thomas K. Scheber, a former Pentagon nuclear weapons policymaker and former Los Alamos National Laboratory official, said China, Russia, Pakistan, and India are developing advanced strike weapons.

“Numerous reports on Russian strategic force developments cite the potential value of deploying conventional warheads on ballistic missiles,” Scheber said, noting plans for conventional warheads on ballistic missiles.

“In November 2014 a Russian defense industry executive announced that Russia would have an air-launched hypersonic missile by 2020,” he added.

On China, Scheber noted that China conducted six test of a hypersonic glide vehicle designed to be launched from a long-range missile.

“The vehicle, dubbed DF-ZF in press reports, is described as capable of maneuvering to avoid defenses and gliding to its target at speeds up to ten times the speed of sound, i.e., hypersonic,” he said, noting that the “DF-ZF could carry either a nuclear warhead or perform non-nuclear strike missions.”

Russia Claiming Anti-hypersonic missile defense will be deployed by 2019

Russia's air defenses will have the ability to effectively repel hypersonic attacks by 2020, according to the Russian Ground Forces' Air Defense Force chief Alexander Leonov.

Russia's next generation air defense systems are set to enter service before the end of 2019.


Monday, December 7, 2015

The potential 100 year life of the B52 bomber and the history of attempted replacements


The B-52 is an Air Force plane that refuses to die. Originally slated for retirement generations ago, it continues to be deployed in conflict after conflict. It dropped the first hydrogen bomb in the Bikini Islands in 1956, and laser-guided bombs in Afghanistan in 2006. It has outlived its replacement. And its replacement’s replacement. And its replacement’s replacement’s replacement.

Air Force commanders are now urging the Pentagon to deploy B-52s in Syria.

76 B-52s still make up the bulk of the United States’ long-range bomber fleet, and they are not retiring anytime soon. The next potential replacement — the Long Range Strike Bomber, which has yet to be designed — is decades away, so the B-52 is expected to keep flying until at least 2040. By then, taking one into combat will be the equivalent of flying a World War I biplane during the invasion of Iraq in 2003.


The Air Force to churn out more than 740 of the swept-wing B52 bombers at a then-unprecedented cost of around $8 million each. The Boeing B-52 Stratofortress is a long-range, subsonic, jet-powered strategic bomber. The B-52 was designed and built by Boeing, which has continued to provide support and upgrades. It has been operated by the United States Air Force (USAF) since the 1950s. The bomber is capable of carrying up to 70,000 pounds (32,000 kg) of weapons. The first flew in 1952 and the last was built in 1962.

The B52's rugged design has allowed it to go nearly anywhere and drop nearly anything the Pentagon desires, including both atomic bombs and leaflets.

Underwhelming jets have been put forth to take the place of the B52.

Even as the B52 bombers were being assembled, defense officials were planning their replacement, but each plan was undone by its own complexity. First was a nuclear-powered bomber able to stay aloft for weeks (too radioactive),

The Convair X-6 was a proposed experimental aircraft project to develop and evaluate a nuclear-powered jet aircraft. The project was to use a Convair B-36 bomber as a testbed aircraft, and though one NB-36H was modified during the early stages of the project, the program was canceled before the actual X-6 and its nuclear reactor engines were completed. The X-6 was part of a larger series of programs, costing US$7 billion in all, that ran from 1946 through 1961.

An air-to-air view of the Convair NB-36H Peacemaker experimental aircraft (s/n 51-5712) and a Boeing B-50 Superfortress chase plane during research and development taking place at the Convair plant at Forth Worth, Texas (USA).

Project Pluto was a United States government program to develop nuclear powered ramjet engines for use in cruise missiles. Project Pluto was in the 1960s.

then the supersonic B-58 with dartlike wings (kept crashing), and

B58

then the even faster B-70 (spewed highly toxic exhaust).

B70

The $283 million B-1B Lancer first rolled off the assembly line in 1988 with a state-of-the-art radar-jamming system that jammed its own radar.

B1B

The $2 billion B-2, with its delicate radar-evading coating, had to be stored in a climate-controlled hangar to be effective, and its sensors at first could not tell a storm cloud from a mountain. It soon became known as the $2 billion bomber that cannot go out in the rain.




The Air Force is trying to change the image of the B-52 from indiscriminate carpet bomber to precision weapon. Laser-targeting pods attached to the wing of many of the bombers in recent years allow them to drop guided “smart” bombs.

The Long Range Bomber Program

The Pentagon awarded the most fiercely-fought weapons contest in more than a decade to Northrop Grumman Corp., a $21.4 billion initial deal to build new long-range bombers for the U.S. Air Force.

Northrop Grumman was selected over a Boeing Co. and Lockheed Martin Corp. team to build the first 21 jets to replace aging B-52 and B-1 war planes. The contract eventually could be worth $80 billion and provide 100 planes total. The first aircraft are due to enter service around 2025.

The new radar-evading bomber is designed to fly undetected over potential adversaries such as Russia or China that have upgraded their air defenses. The plane is capable of firing conventional and nuclear weapons, becoming the third leg of the nuclear triad alongside submarine and land-based ballistic missiles



Pentagon officials in recent weeks have provided a few details on what the Air Force has called one of its top three priorities, alongside the Lockheed-built F-35 fighter and Boeing-built KC-46A refueling tanker.

The contract is broken up into two parts — the cost-plus incentive fee development contract awarded today, and a separate agreement on the first five low-rate initial production lots that will be fixed-price incentive fee. Those first five lots will cover the production of 21 bombers.

The service requested that two independent government cost estimators look at the program. The two groups projected that each bomber will cost $511 million in 2010 dollars on average if 100 planes are built, Air Force officials told reporters on Tuesday — substantially less than the original $550 million target cost set by then Secretary of Defense Robert Gates. This translates to $564 million per plane in fiscal year 2016 dollars.

LRS-B’s projected unit cost is higher compared to the B-1, but significantly lower relative to the $1.5 billion price tag of Northrop’s B-2, according to an Air Force handout. The expected development cost overall for LRS-B is also lower than for the B-2, at $23.5 billion.

SOURCES- Wall Street Journal, Defense News, wikipedia, NY Times

 http://www.seattletimes.com/

After 60 years, B-52 bombers slow, rusty and frighteningly effective 


A B-52 undergoes maintenance at Barksdale Air Force Base in Louisiana. The bombers, scheduled for retirement years ago, are now expected to keep flying until at least 2040. (EDMUND D FOUNTAIN/NYT)

The B-52, originally scheduled for retirement generations ago, has outlived its replacement. And its replacement’s replacement. And its replacement’s replacement’s replacement.
OVER THE GREAT PLAINS — Glance down from the ageless expanse of blue sky and look around the cockpit of the Air Force’s largest bomber, where the panorama is more dated: banks of steam gauges quiver above aluminum levers built during the Eisenhower administration, obsolete knobs and dials unused in decades gather dust.
Much of the rest of the mammoth B-52 bomber is just as antiquated. Vacuum tubes have been replaced with microchips, and the once-standard ashtrays are gone. But eight engines along the wings still connect to the cockpit by yards of cables and pulleys, and the navigator often charts a course with a slide rule.
“It’s like stepping back in time,” said Capt. Lance Adsit, 28, the pilot. He banked left to start a mock bombing run, wrestling a control yoke forged decades before he was born. Time had stripped it of paint.
“I love the B-52,” Adsit said. “But the fact that this is still flying is really insane.”
A few minutes later, his onboard navigation computers crashed.
The B-52 is an Air Force plane that refuses to die. Originally scheduled for retirement generations ago, it continues to be deployed in conflict after conflict. It dropped the first hydrogen bomb in nuclear tests at the Bikini Atoll in 1956, and it laser-guided bombs in Afghanistan in 2006. It has outlived its replacement. And its replacement’s replacement. And its replacement’s replacement’s replacement.
Air Force commanders are now urging the Pentagon to deploy B-52s in Syria.
“We’re ready, we’re hungry, we’re eager to be in the fight,” said Col. Kristin Goodwin, who commands the 2nd Bomb Wing at Barksdale Air Force Base in Louisiana, where about half the bombers are based.
The bomber, in its 60th year of active service, is slow, primitive and weighed down by an infamy lingering from the carpet bombing of Vietnam in the 1960s. But 76 B-52s make up the bulk of the United States’ long-range bomber fleet, and they are not retiring anytime soon. The next potential replacement — the Long Range Strike Bomber, which has yet to be designed — is decades away, so the B-52 is expected to keep flying until at least 2040. By then, taking one into combat will be the equivalent of flying a World War I biplane during the invasion of Iraq in 2003.

Replacements fall short

The unexpectedly long career is due in part to a rugged design that has allowed the B-52 to go nearly anywhere and drop nearly anything the Pentagon desires, including atomic bombs — and leaflets. But it is also due to the underwhelming jets put forth to take its place. The $283 million B-1B Lancer first rolled off the assembly line in 1988 with a state-of-the-art radar-jamming system that jammed its own radar. The $2 billion B-2 Spirit, introduced a decade later, had stealth technology so delicate that it could not go into the rain.
“There have been a series of attempts to build a better intercontinental bomber, and they have consistently failed,” said Owen Coté, a professor of security studies at the Massachusetts Institute of Technology. “Turns out whenever we try to improve on the B-52, we run into problems, so we still have the B-52.”
Officially, the B-52 is called the Stratofortress, but flight crews long ago nicknamed it the BUFF, a colorful acronym that the Air Force euphemistically paraphrases as Big Ugly Fat Fellow.
Too outmoded to be a stealth bomber, the B-52 has become the anti-stealth bomber: a loud, obvious and menacing albatross. It has pummeled armored divisions in Iraq and has laid thunderous walls of destruction over Taliban positions in Afghanistan.
“The big plane was very good,” said one beaming Northern Alliance commander in 2001. In more recent years, it has flown only what the Air Force calls “assurance and deterrence” missions near North Korea and Russia. In 2013, when China claimed disputed airspace over the South China Sea, two B-52s soared through in defiance.
“The BUFF is like the rook in a chess game,” said Maj. Mark Burley, the co-pilot for the training mission over the Great Plains. “Just by how you position it on the board, it changes the posture of your adversary.”

Embarrassing failures

A front-page story in The New York Times in 1966 said all B-52s would need to retire by 1975 because they would “be too old to continue beyond that point.” But no viable alternative emerged.
In 1982, President Reagan warned: “Many of our B-52 bombers are now older than the pilots who fly them.” Today, there is a B-52 pilot whose father and grandfather flew the plane.
Reagan rushed production of the B-1, which was designed to fly fast and low beneath enemy defenses. It was expected to replace the B-52 in the 1990s, but in a prelude of future problems, the first B-1 unveiled in 1985, before a crowd of 30,000, failed to start. Design flaws and engine fires sidelined the plane during the Persian Gulf War and have limited its use since.
Next came the B-2 stealth bomber in 1997. But the B-2, with its delicate radar-evading coating, had to be stored in a climate-controlled hangar to be effective, and its sensors at first could not tell a storm cloud from a mountain. It soon became known as the $2 billion bomber that cannot go out in the rain.
The B-52 became a technologically humble — but still frighteningly effective — stand-in.
The Air Force is trying to change the image of the B-52 from indiscriminate carpet bomber to precision weapon. Laser-targeting pods, attached to wings of many of the bombers in recent years, allow them to drop guided “smart” bombs. Also in recent years, the big bombers circling high above Afghanistan acted as close air support. “We’re as accurate as a fighter,” said Lt. Col. Sarah Hall, a B-52 pilot who flew missions over Afghanistan.

Airborne museum piece

While its weaponry has been upgraded, the rest of the plane can look like a midcentury museum exhibit.
Ground crews scouring the aging frames for rust often find graffiti in hidden nooks by previous generations; a recent discovery, perhaps commenting on the planes’ age, featured primitive cave-style animal paintings.
Despite intensive maintenance, the B-52s’ ages are starting to show. On a recent training flight out of Barksdale Air Force Base after three days of rain, leaks in a bomber left its seats soaked and the control panel glistening. One engine refused to start, and then some wiring shorted.
“This is really the full BUFF experience,” the co-pilot said with a patient grin. “But once we get airborne, we’re usually OK.”
A few minutes later, the bomber with a crew of five roared into the sky and banked toward its mock bombing target in Texas.

The Buzz

The XB-70: America's Mach 3 Super Bomber That Never Was



The North American XB-70 Valkyrie was the largest and fastest bomber ever built by the United States, but the massive six-engine Mach 3.0-capable jet never entered production. Only one surviving prototype sits in a museum in Dayton, Ohio, even as the Boeing B-52 it was supposed to one day replace continues to soldier on.
The idea behind the XB-70 originated in the 1950s when it was assumed ever-greater speeds and altitudes would enable American bombers to survive against Soviet air defenses unmolested on their way to delivering their doomsday payloads. At the time, the only effective defense against bombers were fighters and antiaircraft artillery. Even then, anti-aircraft guns were only marginally effective and interceptors were increasingly challenged by ever improving bomber performance.
However, with the advent of surface-to-air missiles (SAM), that began to change—the balance started to tip in favor of the defender. While the U.S. Air Force was aware of Soviet advances in SAM technology, the Pentagon didn’t start to understand the scope of the problem until Francis Gary Powers’ Lockheed U-2 spy plane was shot down while overflying the Soviet Union on May 1, 1960. But development of the XB-70 continued nonetheless.
(Recommended: 5 Places World War III Could Break Out)
With the growing realization that Soviet SAMs posed an increasing threat to American bombers, the Pentagon started to explore low-level penetration as an alternative. Low-level penetration involved flying under the radar horizon using terrain to mask a bomber’s approach, which greatly reduces enemy response times. Moreover, the development of intercontinental ballistic missiles greatly reduced the United States’ reliance on manned bombers. Many leading military strategists of the time believed bombers were too vulnerable to survive the journey into Soviet airspace. As a result, President John F. Kennedy decided to cancel the XB-70 as a frontline  bomber program on March 28, 1961.
Meanwhile, the XB-70 test program continued. The jet made its first flight on Sept 21, 1964, when it flew from Palmdale to Edwards Air Force Base, Calif. But the first XB-70 proved to be a disappointment—it had poor directional stability above Mach 2.5 and made only one flight above Mach 3.0. The second jet, which flew on July 17, 1965, added five degrees of dihedral on the wings for better supersonic stability.
Tragedy struck on June 8, 1966, when the second XB-70 prototype was destroyed in a crash after a midair collision with its F-104N chase plane. Two people were killed and one was severely injured during the accident. The loss of the second aircraft—which was much more capable than the first—was a huge set back. Testing, however, continued until Feb. 4, 1969. Ultimately, the first XB-70 logged eighty-three flights totaling 160 hours and sixteen minutes, while the second XB-70 logged forty-six flights totaling ninety-two hours and twenty-two minutes according to NASA.
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The XB-70, while a technological wonder at the time, was the wrong plane for the wrong time. It came at a time when ballistic missiles were thought to be supplanting manned bombers. Moreover, it was being developed at a time when it was increasingly apparent that high speed and high altitude were not sufficient protection against surface-to-air missiles or the next generation of Soviet fighters.
But the nail in the coffin was the jet’s exorbitant price tag and lack of mission flexibility—the B-70 couldn’t be adapted for the low level role. Let’s hope today’s shadowy Long Range Strike Bomber fares better.
(Recommended: Russia's 'F-22' Is Simply Amazing)
Dave Majumdar is the defense editor for The National Interest. You can follow him on Twitter: @davemajumdar.

Wednesday, March 18, 2015

Small Diameter Bomb

From Wikipedia, the free encyclopedia


GBU-39 (Small Diameter Bomb)
SDB3.jpg
4 SDBs (training/ground handling variant) loaded on an F-15E Strike Eagle
Type Bomb
Place of origin United States
Service history
In service 2006–present
Used by United States
Israel
Italy
Wars War in Afghanistan, Iraq War, Gaza War
Production history
Manufacturer Boeing Integrated Defense Systems
Unit cost US$40,000 (SDB)[1]
US$250,000FY2014[2] (SDB II)
Produced 2005–present
Variants GBU-39 / GBU-40
Specifications
Weight 285 lb (129 kg)
Length 70.8 in (1.80 m)[3]
Width 7.5 in (190 mm)

Warhead AFX-757 Dense Inert Metal Explosive[citation needed]
SDB: penetrating blast fragmentation[4]
SDB FLM: blast ultra low fragmentation[5]
Warhead weight 206 lb (93 kg)[4][5]

Operational
range
SDB I (GBU-39)
more than 60 nmi (110 km)[3]
SDB II (GBU-53)
45 miles (72km) against moving targets[6]
Guidance
system
SDB I (GBU-39)
GPS / INS
SDB II (GBU-53)
GPS/INS with coupled IMU/datalink, IIR and millimeter wave Active radar homing
Accuracy SDB I (GBU-39)
5–8 m CEP
SDB II (GBU-53)
1m CEP est.
GBU-39 Small Diameter Bomb
The GBU-39 Small Diameter Bomb (SDB) is a 250 lb (110 kg) precision-guided glide bomb that is intended to provide aircraft with the ability to carry a higher number of bombs. Most US Air Force aircraft will be able to carry (using the BRU-61/A rack) a pack of four SDBs in place of a single 2,000 lb (907 kg) bomb.[7]
The Small Diameter Bomb II (SDB-II) / GBU-53/B scheduled to enter production in January 2014 will add a tri-mode seeker (radar, infrared homing, and semiactive laser guidance) to the INS and GPS guidance of the original SDB.[8]
The patent of the GBU-39 lists depleted uranium as one of the materials likely to be used for incendiary purposes.[9]

Description

The original SDB is equipped with a GPS-aided inertial navigation system to attack fixed/stationary targets such as fuel depots, bunkers etc. The second variant (Boeing's GBU-40 or Raytheon's GBU-53 (SDB II)) will include a thermal seeker and radar with automatic target recognition features for striking mobile targets such as tanks, vehicles, and mobile command posts.[10]
The small size of the bomb allows a single strike aircraft to carry more of the munitions than is possible utilizing currently available bomb units. The SDB carries approximately 38 pounds (17 kg) of AFX-757 high explosive.[citation needed] It also has integrated "DiamondBack" type wings which deploy after release, increasing the glide time and therefore the maximum range. Its size and accuracy allow for an effective munition with less collateral damage.[11]
  • Warhead penetration: 3 feet (0.91 m) of steel reinforced concrete [12]
  • Fuze: Electronic safe and fire (ESAF) cockpit selectable functions, including air burst and delayed options.
The GBU-39 has a circular error probable (CEP) of 5–8 meters,[11] which means it has a 50% probability of hitting within that distance of its intended target. CEP is reduced by updating differential GPS offsets prior to weapon release. These offsets are calculated using an SDB Accuracy Support Infrastructure, consisting of three or more GPS receivers at fixed locations transmitting calculated location to a correlation station at the theatre Air Operations Center. The corrections are then transmitted by Link 16 to SDB-equipped aircraft.

Development

In 2002, while Boeing and Lockheed Martin were competing to develop the Small Diameter Bomb, Darleen A. Druyun—at that time Principal Deputy Assistant Secretary of the Air Force for Acquisition and Management—deleted the requirement for moving target engagement, which favored Boeing. She was later convicted of violating a conflict of interest statute.[13][14]
On May 1, 2009, Raytheon announced that it had completed its first test flight of the GBU-53/B Small Diameter Bomb II, which has a data link and a tri-mode seeker built with technology developed for the Precision Attack Missile.[15] And on August 10, 2010 the U.S. Air Force awarded a $450 million contract for engineering and development.[16]
Although unit costs were somewhat uncertain as of 2006, the estimated cost for the INS/GPS version was around US$70,000. Boeing and the Italian firm Oto Melara have signed a contract covering the license production of 500 GBU-39s (INS/GPS) and 50 BRU-61/a racks for the Aeronautica Militare, at a cost of nearly US$34 million. US$317m was spent on R&D and spares for SDB II in FY13/14, with US$148.5m requested in these categories for FY15, the total budget split roughly 70:30 between USAF and USN.[2] SDB II production began in FY14 with 144 bombs for the USAF at a unit cost of US$250,000.[2] The FY15 budget requested 246 bombs at a cost of US$287,000 each.[2]

Timeline

  • October 2001 – Boeing is awarded the SDB contract.[17]
  • September 2005 – Small Diameter Bomb certified for operational test, evaluation.[18]
  • September 2006 – SDB team deliver the first SDBs to the USAF.[19]
  • October 2006 – Initial Operational Capability declared for SDB on the F15E.[20]
  • October 2006 – First use in combat.[21]
  • February 2008 – 1,000th SDB I and first 50 FLM delivered.[22]
  • September 2008 – Israel receives approval from the US Congress to purchase 1,000 bombs.[23]
  • December 2008 – Reportedly used against Hamas facilities in the Gaza Strip, including underground rocket launchers.[23]
  • January 2009 – Unnamed Boeing official stated that they have yet to deliver any SDBs to Israel.[24]
  • August 2010 – U.S. Air Force selects Raytheon's GBU-53/B for Small Diameter Bomb II Program.[25]

Aircraft

The SDB is currently integrated on the F-15E Strike Eagle, Panavia Tornado, and AC-130W. Future integration is planned for the F-16 Fighting Falcon, F-22 Raptor, F-35 Lightning II, A-10 Thunderbolt II, B-1 Lancer, B-2 Spirit, and the B-52 Stratofortress. Other aircraft, including UCAVs, may also receive the necessary upgrades.
GBU-39 began separation tests on the F-22 in early September 2007 after more than a year of sometimes difficult work to integrate the weapon in the weapons bay and carry out airborne captive carry tests.

Ground-launched SDB

Boeing is modifying the Small Diameter Bomb with a rocket motor to be launched from ground-based missile systems such as the M270 MLRS. With the Army demilitarizing cluster munitions from M26 rockets, the company says a special adapter case could reuse the rocket to launch the SDB. After the motor launches it to a high enough altitude and speed, the wings will deploy and glide the bomb to its target. The company believes it can fill a gap for long-range precision fires while using its smaller warhead to save larger rocket munitions for strategic targets. While typical MLRS systems follow a ballistic trajectory, the rocket-launched SDB can be launched to an altitude and glide on a selected trajectory.[26][27] Boeing and Saab Group announced a successful GLSDB test in March 2015.[28]

Laser SDB

In mid-2012, the U.S. Senate recommended zeroing out funding for the SDB II due to fielding delays with the F-35 Lightning II. With the delay in SDB II fielding, Boeing recommended an upgrade to their SDB as a temporary gap-filler to get desired performance at a fraction of the cost. Called the Laser Small Diameter Bomb (LSDB), it integrates the laser used on the JDAM to enable the bomb to strike moving targets. Boeing began testing the LSDB in 2011 and successfully hit targets traveling 30–50 mph (48–80 km/h).[29] In June 2013, the Air Force announced it would award Boeing a contract to develop and test the LSDB; the contract is for phase one part two engineering, integration and test, and production support and an LSDB Weapon Simulator. Boeing says the LSDB can be built at a lower cost than the planned Raytheon SDB II, as it will use the same semi-active laser sensor as the JDAM to hit moving and maritime targets. However, Boeing admits that it does not have the capability to engage targets in zero-visibility weather, as it lacks the SDB II's millimeter wave radar.[30]

SDB Focused Lethality Munition (FLM)

Under a contract awarded in September 2006, Boeing is developing a version of the SDB I which replaces the steel casing with a lightweight composite casing and the warhead with a focused-blast explosive such as Dense Inert Metal Explosive (DIME). This should further reduce collateral damage when using the weapon for pin-point strikes in urban areas.[31]
On 28 February 2008, Boeing celebrated the delivery of the first 50 FLM weapons.[32]
The USAF intends to use the same FLM casing on a weapon of 500 pounds (227 kg).[33]
In December 2013, Boeing delivered the last of the 500 FLMs under contract.[34]