Key point: America's new B-21 bomber will be very advanced and difficult to stop.

The Air Force’s stealthy long-range bomber will have the endurance and next-generation stealth capability to elude the most advanced existing air defenses and attack anywhere in the world, if needed, senior service officials said.

When the Air Force revealed its first artist rendering of what its new Long Range Strike – Bomber looks like, former Air Force Secretary Deborah James made reference to plans to engineer a bomber able elude detection from even the best, most cutting-edge enemy air defenses.

"Our 5th generation global precision attack platform will give our country a networked sensor shooter capability enabling us to hold targets at risk anywhere in the world in a way that our adversaries have never seen," James said when revealing the image last year.

However, while Air Force developers say the emerging B-21 will introduce new stealth technologies better suited to elude cutting-edge air defenses, Russian media reports have recently claimed that stealth technology is useless against their air defenses. Russian built S-300 and S-400 air defenses are believed to be among the best in the world; in addition, The National Interest has reported that Russia is now working on an S-500 system able to destroy even stealthy targets at distances up to 125 miles.

Nevertheless, James added that the new bomber will be able to “play against the real threats.”

Although official details about the B-21 are, quite naturally, not available - some observers have pointed out that the early graphic rendering of the plane does not show exhaust pipes at all; this could mean that the Air Force has found a new method or releasing fumes or reducing the heat signature of the new stealth plane.

The new bomber, called the B-21, was formally named the "Raider" through a formal naming competition involving members of the Air Force, their families and other participants.

The Air Force has awarded a production contract to Northrop Grumman to engineer its new bomber. The LRS-B will be a next-generation stealth aircraft designed to introduce new stealth technology and fly alongside - and ultimately replace - the service’s existing B-2 bomber.

“With LRS-B, I can take off from the continental United States and fly for a very long way. I don’t have to worry about getting permission to land at another base and worry about having somebody try to target the aircraft. It will provide a long-reach capability,” Lt. Gen. Bunch, Air Force Military Deputy for Acquisition, told Scout Warrior in an interview last year.

The service plans to field the new bomber by the mid-2020s. The Air Force plans to acquire as many as 80 to 100 new bombers for a price of roughly $550 million per plane in 2010 dollars, Air Force leaders have said.

Although there is not much publically available information when it comes to stealth technology, industry sources have explained that the LRS-B is being designed to elude the world’s most advanced radar systems.

For instance, lower-frequency surveillance radar allows enemy air defenses to know that an aircraft is in the vicinity, and higher-frequency engagement radar allows integrated air defenses to target a fast-moving aircraft. The concept with the new bomber is to engineer a next-generation stealth configuration able to evade both surveillance and engagement radar technologies.

The idea is to design a bomber able to fly, operate and strike anywhere in the world without an enemy even knowing an aircraft is there.  This was the intention of the original B-2 bomber, which functioned in that capacity for many years, until technological advances in air defense made it harder for it to avoid detection completely.

The new aircraft is being engineered to evade increasingly sophisticated air defenses, which now use faster processors, digital networking and sensors to track even stealthy aircraft on a wider range of frequencies at longer ranges. These frequencies include UHF, VHF and X-band, among others.

Stealth Technology

Stealth technology works by engineering an aircraft with external contours and heat signatures designed to elude detection from enemy radar systems.

At the same time, advanced in air defense technologies are also leading developers to look at stealth configurations as merely one arrow in the quiver of techniques which can be employed to elude enemy defenses, particulalry in the case of future fighter aircraft.  New stealthy aircraft will also likely use speed, long-range sensors and manueverability as additional tactics intended to evade enemy air defenses - in addition to stealth because stealth configurations alone will increasingly be more challenged as technology continues to advance.

However, stealth technology is itself advancing - and it is being applied to the B-21, according to senior Air Force leaders who naturally did not wish to elaborate on the subject.

“As the threat evolves we will be able to evolve the airplane and we will still be able to hold any target at risk” Bunch said.

Although the new image of LRS-B does look somewhat like the existing B-2, Air Force officials maintain the new bomber’s stealth technology will far exceed the capabilities of the B-2.

At the same time, the B-2 is being upgraded with a new technology called Defensive Management System, a system which better enables the B-2 to know the location of enemy air defenses.

Prior to awarding the contract to Northrop, the Air Force worked closely with a number of defense companies as part of a classified research and technology phase. So far, the service has made a $1 billion technology investment in the bomber.

“We've set the requirements, and we’ve locked them down. We set those requirements (for the LRS-B) so that we could meet them to execute the mission with mature technologies,” Bunch said.

The Long Range Strike-Bomber will be built upon what the Air Force calls an “open systems architecture,” an engineering technique which designs the platform in a way that allows it to quickly integrate new technologies as they emerge.

“We’re building this with an open mission systems architecture. As technology advances and the threat changes, we can build upon the structure.  I can take one component out and put another component in that addresses the threat.  I have the ability to grow the platform,” Bunch explained.

Air Force leaders have said the aircraft will likely be engineered to fly unmanned missions as well as manned missions.

The new aircraft will be designed to have global reach, in part by incorporating a large arsenal of long-range weapons. The LRS-B is being engineered to carry existing weapons as well as nuclear bombs and emerging and future weapons, Air Force officials explained.

“We're going to have a system that will be able to evolve for the future. It will give national decision authorities a resource that they will be able to use if needed to hold any target that we need to prosecute at risk,” Bunch said.

This first appeared in Scout Warrior here. This article first appeared several years ago.

Image: DVIDShub.