USAF Considers B-21-Like Stealth Aircraft for Future Air-to-Air Combat Missions

The U.S. Air Force is considering a stealthy air-to-air combat aircraft based on the B-21 Raider’s design principles. This concept would mark a significant shift from traditional fighter aircraft silhouettes toward long-range, low-observable platforms capable of dominating contested airspace in future conflicts.

Beyond Fighters: Reimagining Air Superiority with Stealth Bombers

Speaking at the Mitchell Institute’s 2024 Future of Warfare Symposium on May 8, Lt. Gen. Richard G. Moore Jr., USAF Deputy Chief of Staff for Plans and Programs, revealed that the service is examining whether a B-21-style platform could be adapted into an air dominance role. “There’s nothing that says that a B-21-like platform couldn’t be an air-to-air platform,” Moore stated.

This statement reflects a broader doctrinal and technological evolution within the USAF’s Next Generation Air Dominance (NGAD) program. Traditionally, fighters like the F-22 Raptor or F-35 Lightning II have defined air superiority roles with high agility and short-range engagements in mind. However, future conflicts—particularly against peer adversaries like China—are expected to require longer-range operations from standoff distances due to advanced anti-access/area denial (A2/AD) systems.

The idea of using a bomber-shaped stealth aircraft for air combat challenges conventional wisdom but aligns with emerging operational needs such as:

Extended range and loiter time over contested areas
Large internal payload capacity for advanced weapons
Low observability optimized for radar evasion
Manned-unmanned teaming and battle management capabilities

The B-21 Raider as a Design Reference Point

The Northrop Grumman B-21 Raider—currently undergoing flight testing—is designed as a long-range penetrating strike bomber under the Long Range Strike Bomber (LRS-B) program. While its primary mission is strategic bombing with nuclear and conventional capabilities, its stealth shaping and modular open systems architecture (MOSA) make it an attractive candidate for adaptation into other roles.

According to Northrop Grumman and USAF officials, the B-21 includes digital engineering foundations that allow rapid reconfiguration of mission systems and payloads. This flexibility could enable variants tailored for electronic warfare (EW), intelligence/surveillance/reconnaissance (ISR), or even air dominance missions.

If adapted for air-to-air roles, such a platform could potentially carry:

Long-range air-to-air missiles such as AIM-260 JATM or future hypersonic interceptors
Advanced AESA radar arrays integrated flush into its skin
Directed energy weapons or electronic attack pods in internal bays
Crewed or optionally-crewed command-and-control modules to direct Collaborative Combat Aircraft (CCA)

The NGAD Ecosystem: More Than Just One Fighter

The NGAD program is not centered around one single aircraft but rather an integrated “system-of-systems” approach comprising:

A manned sixth-generation fighter (sometimes referred to as F-X)
Multiple types of Collaborative Combat Aircraft (CCA)—autonomous drones acting as sensors/shooters/decoys
A family of supporting platforms including tankers, ISR nodes, EW assets—all networked via secure data links like Link-16 successors or ABMS constructs

In this context, a stealthy long-range platform derived from the B-21 could serve dual purposes:

A missile truck launching volleys of long-range interceptors beyond visual range (BVR)
An airborne command node coordinating unmanned assets in denied environments where traditional AWACS may be vulnerable

This concept also aligns with recent comments by Secretary of the Air Force Frank Kendall emphasizing “affordable mass” through CCAs paired with fewer but more capable manned aircraft.

Morphing Form Factors: From Fighter Jets to Flying Wings?

The potential shift toward flying-wing designs—traditionally associated with bombers—for air combat reflects how survivability now trumps maneuverability in some mission profiles. With modern active electronically scanned array (AESA) radars enabling beyond-line-of-sight targeting and off-boresight missile capabilities reducing reliance on dogfighting agility, shape optimization for radar evasion becomes paramount.

This trend is visible globally:

China’s JH-XX concept reportedly explores bomber-sized platforms with AAM payloads.
Russia’s PAK DA program hints at multi-role strategic bombers potentially equipped with defensive/offensive AAMs.

If realized by the USAF, this would represent one of the most radical redefinitions of what constitutes an “air superiority” platform since the jet age began—prioritizing endurance and signature management over thrust-vectoring agility.

Challenges Ahead: Cost, Doctrine & Industrial Capacity

Despite its promise, adapting a bomber-like design into an effective fighter faces several hurdles:

Cost:

Tactics & Doctrine:

Sustainment & Logistics:

Munitions Compatibility:

Boeing’s LANCER Concept Offers Parallel Vision

Boeing has previously teased its Large Agile Next-generation Combatant Engineered Response—or LANCER—a tailless flying wing concept designed specifically for NGAD missions. While details remain classified or speculative, renderings suggest that industry players are already envisioning alternatives to traditional fighter shapes optimized around survivability and sensor fusion rather than raw kinematics alone.

Toward Operational Decision Points by Late Decade

The USAF intends to field initial elements of NGAD by circa FY2030. Whether this includes a modified B-21-type platform remains uncertain—but Moore’s comments suggest serious internal consideration is underway within both ACC planning circles and acquisition offices under SAF/AQ oversight.

If successful testbeds can demonstrate high-performance sensors/weapons integration aboard flying wing architectures—and if cost-per-effect calculations validate their utility—the next generation “fighter” may look far more like a stealth bomber than anything currently flying today.