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The design was unveiled in Denver, Colorado, on November 15, 2016, and it was initially intended to make its first subsonic flight in late 2017, powered by three General Electric CJ610 turbojets (a civilian J85), with subsequent supersonic flight testing at Edwards Air Force Base, California.
The XB-1 Baby Boom is 68 feet (21 m) long with a 17 ft (5.2 m) wingspan and a 13,500-pound (6,100 kg) maximum take-off weight. Powered by three non-after-burning (“dry”) J85-15 engines with variable geometry inlets and exhaust, the prototype should be able to sustain Mach 2.2 with more than 1,000 nmi (1,900 km; 1,200 mi) of range. As a technology demonstrator for the Boom Overture, the XB-1's trijet configuration matched that of the Overture. In 2022, the Overture was redesigned to a quadjet configuration. The XB-1 retains the original trijet configuration.
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The XB-1 is constructed of lightweight composites, titanium and A286. Materials for the hot leading edges and 307 °F (153 °C) nose, and epoxy materials for cooler parts, are provided by Dutch TenCate Advanced Composites, high-temperature materials supplier for the SpaceX Falcon 9.[8] The airframe will be primarily intermediate-modulus carbon fiber/epoxy, with high-modulus fibers for the wing spar caps and bismaleimide pre-preg for the high-temperature leading edges and ribs
The rear section of fuselage containing the engines is made from 90% titanium and 10% A286 stainless steel alloys
The rear section of fuselage containing the engines is made from 90% titanium and 10% A286 stainless steel alloys