American bomber missions regularly last 20 hours or more, making the addition of a second pilot vital for crew endurance.

The US Air Force has confirmed the B-21 Raider will operate with a two-pilot cockpit and will launch a transition program allowing experienced weapon systems officers (WSOs) and combat systems officers (CSOs) to become qualified B-21 pilots. The move is designed to expand the B-21 pilot pipeline while retaining decades of operational expertise as legacy bomber and fighter fleets gradually retire. The move also provides one of the clearest indications yet of how the Air Force intends to build the workforce needed for its next-generation stealth bomber.

The B-21 Raider’s (Reported) Specifications

• Year Introduced: Not yet introduced (anticipated 2027)
• Number Built: 3 (prototypes)
• Length: 54 ft (16.46 m)
• Wingspan: 132 ft (40.2 m)
• Weight (MTOW): 180,000 lb (81,646 kg)
• Engines: Two Pratt & Whitney PW9000 turbofan engines (27,000 lbf each)
• Top Speed: ~600 mph (965 km/h) / Mach 0.8
• Range: ~ 6,000 mi (9,650 km)
• Service Ceiling: ~50,000 ft (15,240 m)
• Loadout: Internal weapons bay, 20,000 lb (9,070 kg) payload capacity; expected to field a dual-capable loadout of both nuclear and conventional weapons, including precision-guided munitions like the AGM-181 LRSO cruise missile, B61-12 nuclear glide bomb, and B61-13 nuclear bunker buster bombs
• Aircrew: 2

The B-21 is Northrop Grumman’s next-generation stealth bomber. Featuring a flying-wing design derived from the existing B-2 Spirit, the B-21 was designed for conventional strike, nuclear deterrence, and penetrating heavily defended air space. The B-21 was built with advanced low observable technology, digital architecture, and open systems for future upgrades, and is expected to become the backbone of America’s bomber fleet over the coming decades. 

Why Does the B-21 Need a Second Pilot?

The Air Force has confirmed that the B-21 will fly with two pilots, similar to the configuration within the B-2 and the B-1B Lancer. Earlier reports suggested a possible pilot/WSO crew configuration. But the Air Force has opted instead for two fully qualified pilots, reflecting the reality of long-range strategic bomber operations. 

The reason the Air Force regards two bomber pilots as essential has to do with the duration element of their missions. Modern-day strategic bomber missions routinely last 20 hours or more. During Operation Epic Fury, for example, B-2s and B-1Bs reportedly flew 37-hour round-trip missions from the United States to Iran and back. With two pilots, the team can rotate flying duties and rest during cruise. This allows for reduced fatigue, which should help maintain decision-making over extremely long missions. And given the physiological demands placed on aircrews during long-duration nuclear and conventional strike missions, this load sharing becomes especially important.

Air Force WSOs Will Need to Become Pilots, Too

To address the personnel needs of the emerging B-21 ecosystem, the Air Force will now allow WSOs and CSOs to re-qualify as pilots. WSOs, who are common aboard the B-1B, F-15E Strike Eagle, and B-52, are not pilots; instead, they operate sensors, weapons, targeting systems, and defensive systems. However, they are a natural fit for B-21 pilot training, as they already possess deep tactical knowledge of strike operations. CSOs are even broader mission managers, responsible for navigation, mission planning, electronic warfare’s sensor employment, and command-and-control. CSOs often coordinate complex missions involving multiple aircraft.

Rather than start from scratch with new pilots, the Air Force is leveraging the existing WSO and CSO population, with officers who already understand bomber tactics, weapons employment, missions planning, nuclear operations, and contested air space. Flight training thereby becomes an investment built upon years of operational experience, rather than a gamble on a relative unknown who may or may not have the capacity to perform under the pressure of combat.

The move also allows the Air Force to retain experience. Many eligible WSO/CSO officers are serving aboard aircraft whose fleets are shrinking, or approaching retirement. Without new career opportunities, many of those experienced officers could leave the service altogether. But the B-21 transition should provide the individual with an opportunity for career progression while allowing the Air Force to preserve continuity of experience. 

About the Author: Harrison Kass

Harrison Kass is a writer and attorney focused on national security, technology, and political culture. His work has appeared in Tablet, City Journal, The Hill, The Spectator, and The Cipher Brief. He holds a JD from the University of Oregon and a master’s in Global & Joint Program Studies from NYU. More at harrisonkass.com.

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