First rollout of B-21 stealth bomber The U.S. Air Force’s B-21 Raider stealth bomber is described by its manufacturer as “the most advanced military aircraft ever built” NORTHROP GRUMMAN B-21 RAIDER Procurement Minimum of 100 aircraft. Will replace U.S. fleet of B-1 and B-2 bombers Range: Classified Crew: Aircraft can accommodate manned or unmanned operations Speed Likely to be subsonic Artist’s impression of aircraft Stealth features: “Low observable” design and surface coatings to reduce likelihood of interception Weapons Large internal bay for long-range standoff missiles and B61 gravity bombs – conventional and nuclear STEALTH BOMBERS COMPARED B-2 Spirit Wingspan: 52m Entered service: 1997 Engines: Four General Electric F118-100 turbofans Unit cost: $1.157 billion (1998 constant dollars) Payload: 18,144kg B-21 Raider Wingspan: 42m (estimated) Operational: Mid-2020s Engines: Likely two or four Pratt & Whitney F135 turbofans Unit procurement cost $639 million (2019 dollars) Payload: 13,607kg (expected) Sources: Airforce Technology, Defense News, Northrop Grumman, U.S. Air Force © GRAPHIC NEWS