Reviving Supersonic Dreams

Boom Supersonic’s first supersonic flight with the XB-1, the Jeju Air crash in Korea, final NTSB report on United Airlines hard landing, and a hydrogen-steam hybrid cycle engine for single aisle aircraft. Also, small DJI drones, the upcoming FlightSimExpo, personal flying devices, SAF for supersonic aircraft, a mid-air collision final report, and a waterbomber damaged by a drone. Aviation News Boom Supersonic XB-1 first supersonic test flight The first supersonic flight of the XB-1 demonstrator occurred January 28, 2025. The Boom XB-1 is the first independently developed supersonic jet, and the first civil supersonic jet built in America. The XB-1 first flew in March of 2024 and has been through a rigorous program of 11 test flights at steadily increasing speeds. Video: XB-1 First Supersonic Flight https://www.youtube.com/live/-qisIViAHwI?si=MZlE45Otsf0X81Z4 The Starlink Connection: XB-1 Flight Tests Harness Satellite Internet Streaming The XB-1 team used a Starlink Mini to live stream XB-1 flight tests from the Northrop T-38 chase plane. Boom worked with SpaceX to pair the Mini with an aviation data plan. The Mini fits into the T-38’s rear cockpit, allows for an occupant of that seat, and does not impede the safe operation of the aircraft or the ejection seat. Korean Airport Exec Dead Of Suicide After Jeju Air Crash The executive was president of the Korea Airports Corporation from 2018 to 2022 and in charge of the 2020 renovation of Muan International Airport in South Korea. He was found dead at his home of an apparent suicide. Last December, a Jeju Air Boeing 737 ran off the runway and into a concrete support surrounding the localizer antenna, killing 179 of the 181 on board. South Korea has mandated the removal of concrete barriers at seven airports.  NTSB Faults United Airlines Pilot For Hard Boeing 767-300ER Landing That Cracked Fuselage United Airlines flight 702, a Boeing 767-300ER (registered N641UA) flying from Newark Liberty International Airport (EWR) to Houston George Bush Intercontinental Airport (IAH) in Texas, experienced a hard landing. The First Officer had control of the plane as the mains touched down but the nosewheel hit hard and bounced a total of three times. The fuselage skin was buckled and fractured, and the underlying stringers and frames were damaged. The aircraft was repaired and eventually returned to operational service. In its report [PDF], the NTSB found that the FO made nose-down inputs, contributing to the nosewheel abnormally impacting the runway, and were contrary to United Airlines' procedures and training. In addition, the NTSB believes that deployment of the speed brakes and thrust reversers while the nosewheel was still in the air likely contributed to the second runway contact of the nosewheel and the subsequent damage to the airplane. Simple Flying Video: NTSB: United Airlines Pilot At Fault For Boeing 767 Hard Landing That Cracked Fuselage https://www.youtube.com/watch?v=BF3_m7hBmrk Pratt & Whitney Unveils Details Of Hydrogen-Steam Hybrid Engine Cycle Pratt & Whitney has unveiled details of their Hydrogen Steam Injected Intercooled Turbine Engine (HySIITE) concept. Although much more work remains to be done, the concept could lead to commercial geared turbofans with zero carbon emissions and vastly reduced nitrogen oxides (NOx). Image courtesy of Pratt & Whitney Neil Terwilliger, technical fellow for advanced concepts at Pratt, said “HySIITE is about us imagining if there were going to be hydrogen and that it was a viable decarbonization pathway, what kind of engine would take the best advantage of it? Should it look like engines do today, or should we do something different?” The steam injection increases mass flow, improves efficiency, and—Pratt says—dramatically lowers NOx emissions. Pratt & Whitney Hydrogen Steam and Inter-Cooled Turbine Engine (HySITE) HySIITE was studied under a two-year $3.8 million U.S.