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The cockpit windows of the B-21 are unique to the aircraft, and designed to eliminate joints and seams to minimize its radar cross-section. The program completed its critical design review in December 2018. [ 21 ]
Somewhat smaller and with a ‘cleaner’ rear-aspect than the B-2, the B-21 is believed to have an even smaller radar cross-section and be optimized for higher altitude operations as hinted by ...
In those situations, it is useful to use a related quantity called the normalized radar cross-section (NRCS), also known as differential scattering coefficient or radar backscatter coefficient, denoted σ 0 or σ 0 ("sigma nought"), which is the average radar cross-section of a set of objects per unit area:
Reduced radar cross section is only one of five factors the designers addressed to create a truly stealthy design such as the F-22. The F-22 has also been designed to disguise its infrared emissions to make it harder to detect by infrared homing ("heat seeking") surface-to-air or air-to-air missiles.
(Reuters) -The U.S. Air Force's B-21 "Raider" bomber shaped like a flying wing took its first flight on Friday, the next step in rolling out a new fleet of long-range nuclear-capable stealth ...
Bussiere said the B-21 is “on track to deliver operational aircraft to its first main operating base in the mid-2020s.” The Raider will replace the B-1 Lancer and operate alongside the B-2 Spirit.
Northrop Grumman and the Air Force unveiled the stealth nuclear bomber during a December ceremony at the defense contractor's factory in California.
However, many within the division were skeptical of the shape, giving rise to the name "Hopeless Diamond" [11] – Kelly Johnson said to Rich, "Our old D-21 drone has a lower radar cross-section than that goddamn diamond". [10] In May 1975, the Skunk Works produced an internal report titled, "Progress Report No. 2, High Stealth Conceptual Studies."