Setting aside hypersonic flight, Boeing’s Darryl Davis says a supersonic platform is well within the realm of the possible by 2018. However, a supersonic, intercontinental platform would probably weigh two to 2.5 times as much as a subsonic platform, Davis noted. In aircraft, weight usually equates to cost. Davis said Boeing is looking at hybrid concepts of motherships and drones, or standoff sensors coupled with passive penetrators.
The rate of building B-21 bombers would speed up if the fiscal 2026 defense budget passes. But it remains unclear how much capacity would be added, and whether the Air Force would simply build the bombers faster, or buy more.